The perfect frog, after transformation, is smaller than the larva.
In the rivers and lakes pike, pickerel, white fish and sturgeon supply food for the natives, and the brook trout is found in the small mountain streams. The turtle and frog also appear.
The tadpole of the North American bull-frog measures six inches, and that of the Chilian Calyptocephalus gayi seven and a half inches.
Other genera of the family are parasitic on Hemiptera - bugs and frog-hoppers - but nothing is known as to the details of their life-history.
The order is well represented in Britain by 18 genera, which include several species of Orchis: Gymnadenia (fragrant orchis), Habenaria (butterfly and frog orchis), Aceras (man orchis), Hermin- ium (musk orchis), Ophrys (bee, spider and fly orchis), Epipactis (Helleborine), Cephalanthera, Neottia (bird's-nest orchis), one of the few saprophytic genera, which have no green leaves, but derive their nourishment from decaying organic matter in the soil, Listens (Tway blade), Spiranthes (lady's tresses), Malaxis (bog-orchis), Liparis (fen-orchis), Corallorhiza (coral root), also a saprophyte, and Cypripedium (lady's slipper), represented by a single species now very rare in limestone districts in the north of England.
The importance of the osmotic pressure of sea-water in biology will be easily understood from the fact that a frog placed in sea-water loses water by exosmosis and soon becomes 20% lighter than its original weight, while a true salt-water fish suddenly transferred to fresh water gains water by endosmosis, swells up and quickly succumbs.
Like a frog in a mill pond.
From time to time he had collected into volumes his scattered sketches; of these the first, The Celebrated Jumping Frog of Calaveras County, appeared in 1867, and the latest, The Man that Corrupted Hadleyburg, in 1900.
CUCKOO-SPIT, a frothy secretion found upon plants, and produced by the immature nymphal stage of various plant-lice of the familiar Cercopidae and Jassidae, belonging to the homopterous division of the Hemiptera, which in the adult condition are sometimes called frog-hoppers.
Ranarum is found in the alimentary canal of the frog and growing on its excrement.
A remarkable flying-frog was discovered by Professor A.
(367-paXos, "frog," pin, "mouse," and j.
Esculenta, and the American bull-frog R.
The curious horned frog of the Solomon Islands, Ceratobatrachus guentheri, which can hardly be separated from the Ranidae, has teeth in the lower jaw in both sexes, whilst a few forms, such as Dendrobates and Cardioglossa, which on this account have been placed in a distinct family, have no teeth at all, as in toads.
9, and of a frog (Rana esculents), fig.
(30) "On the Structure and Development of the Hyobranchial Skeleton of the Parsley Frog," P.Z.S., 1897, p. 577.
Do you have a frog in your pocket?
The patient's skin burns, that of a frog is cold to the touch; therefore tie to the foot of the bed a frog, bound with red and black thread, and wash down the sick man so that the water of ablution falls 1 In its technical ecclesiastical sense the ablution is the ritual washing of the chalice and of the priest's fingers after the celebration of Holy Communion in the Catholic Church.
Let the medicine man or magician pray that the fever may pass into the frog, and the frog be forthwith released, and the cure will be effected.
A frog or fowl or guinea-pig held in some unnatural pose, and retained so forcibly for a time, becomes "set" in that pose, or rather in a posture of partial recovery of the normal posture.
Erasmus Darwin, the grandfather of Charles Darwin, set forth ',in' Zoonomia a much more definite theory of the relation of variation to evolution, and the following passage, cited by Clodd, clearly expresses it: "When we revolve in our minds the metamorphoses of animals, as from the tadpole to the frog; secondly, the changes produced by artificial cultivation, as in the breeds of horses, dogs and sheep; thirdly, the changes produced by conditions of climate and season, as in the sheep of warm climates being covered with hair instead of wool, and the hares and partridges of northern climates becoming white in winter; when, further, we observe the changes of structure produced by habit, as shewn especially by men of different occupations; or the changes produced by artificial mutilation and prenatal influences, as in the crossing of species and production of monsters; fourth, when we observe the essential unity of plan in all warmblooded animals - we are led to conclude that they have been alike produced from a single living filament."
Frog-mouths, bee-birds, night-hawks and swifts are found in considerable variety.
An Australian tree-frog (Hyla peronii) is naturalized in many parts of the north island of New Zealand.
ANGLER, also sometimes called fishing-frog, frog-fish, seadevil (Lophius piscatorius), a fish well known off the coasts of Great Britain and Europe generally, the grotesque shape of its body and its singular habits having attracted the attention of naturalists of all ages.
They are waterplants, represented in Britain by frog-bit (Hydrocharis Morsusranae) and water-soldier (Stratiotes aloides).
It grows in Frog-bit - male plant, half natural size.
Small species of boa; crocodiles abound in the rivers and lakes; and numerous species of lizard, chameleon and tree-frog inhabit the woods.
The jackal stands for Anup, the hawk for Har, the frog for Hekt, the baboon for Tahuti, and Ptah, Asiri, Hesi, Nebhat, Hat-hor, Neit, Khnum and Amun-hor are all written out phonetically, but never represented in pictures.
The horny hoof is divided into a wall or crust consisting of the front and sides, the flattened or concave sole, and the frog, a triangular median prominence, notched posteriorly, with the apex turned forwards, situated in the hinder part of the sole.
FROG, 1 a name in zoology, of somewhat wide application, strictly for an animal belonging to the family Ranidae, but also used of some other families of the order Ecaudata of the sub-class Batrachia.
Frogs proper are typified by the common British species, Rana temporaria, and its allies, such as the edible frog, R.
These may be various transferred applications of the name of the animal, but the "frog" of a horse was also called "frush," probably a corruption of the French name fourchette, lit.
Among these may be mentioned the hairy frog of West Africa, Trichobatrachus robustus, some specimens of which have the sides of the body and of the hind limbs covered with long villosities, the function of which is unknown, and its ally Gampsosteonyx batesi, in which the last phalanx of the fingers and toes is sharp, claw-like and perforates the skin.
To this family also belong the Rhacophorus of eastern Asia, arboreal frogs, some of which are remarkable for the extremely developed webs between the fingers and toes, which are believed to act as a parachute when the frog leaps from the branches of trees (flying-frog of A.
In the lower jaw of most of the Ecaudata the symphysial cartilages ossify separately from the dentary bones, forming the so-called mento-meckelian bones; but these symphysial bones, so distinct in the frog, are less so in the Hylidae and Bufonidae, almost indistinguishable in the Pelobatidae and Discoglossidae, whilst in the Aglossa they do not exist any more than in the other orders of batrachians.
One of the interesting recent discoveries is that of the "hairy" frog (Trichobatrachus), in which the sides of the body and limbs are covered with long villosities, the function of which is still unknown (36).
But the close relation of its very rich frog-fauna to that of the Ethiopian and Indian regions speaks against attaching too great importance to these negative features.
" Description of a new Tree-frog of the genus Hyla, from British Guiana, carrying eggs on the back," op. cit., 1904, ii.
At first we thought to throw a frog-pond on to it; but concluded to let it burn, it was so far gone and so worthless.
In almost all climes the tortoise and the frog are among the precursors and heralds of this season, and birds fly with song and glancing plumage, and plants spring and bloom, and winds blow, to correct this slight oscillation of the poles and preserve the equilibrium of nature.
The worm inhabits the lung of the frog and toad, and is hermaphrodite (Schneider) or parthenogenetic (Leuckart); the embryos hatched from the eggs find their way through the lungs into the alimentary canal and thence to the exterior; in a few days they develop into a sexual larva, called a Rhabditiform larva, in which the sexes are distinct; the eggs remain within the uterus, and the young when hatched break through its walls and live free in the perivisceral cavity of the mother, devouring the organs of the body until only the outer cuticle is left; this eventually breaks and sets free the young, which are without teeth, and have therefore lost the typical Rhabditis form.
It is absurd to call the larva of a newt or of a Caecilian a tadpole, nor is the free-swimming embryo of a frog as it leaves the egg a tadpole.
Kolliker (Development of Cephalopods, 1844), Remak (Development of the Frog, 1850), and others had laid the foundations of this knowledge in isolated examples; but it was Kovalevsky, by his accounts of the development of Ascidians and of Amphioxus (1866), who really made zoologists see that a strict and complete cellular embryology of animals was as necessary and feasible a factor in the comprehension of their relationships as at the beginning of the century the coarse anatomy had been shown to be by Cuvier.
Within a quarter of an hour after a quantity of cinnabar has been injected into the blood of the frog nearly every particle will be found engulfed by the protoplasm of the leucocytes of the circulating blood.
Homoptera This sub-order includes the cicads, lantern-flies, frog-hoppers, aphids and scale-insects.
- Stone Yoke, carved in the so-called frog-type.
There are various peculiar species of frogs, lizards and snakes, including the great frog Rana Guppyi, from 2 to 3 lb in weight.
He studied the nature of muscular contraction, causing a muscle to record its movements on a smoked glass plate, and he worked out the problem of the velocity of the nervous impulse both in the motor nerves of the frog and in the sensory nerves of man.
Three coecilians, three batrachians (including a mountain-frequenting frog) and three fresh-water crustaceans are also indigenous, and about twenty-six species of land shells.
The bull-frog of the eastern United States and Canada, reaching a length of nearly 8 in.
Pseudis was first described by Marie Sibylle de Merlon (1647-1717), in her work on the fauna of Surinam (published first in 1705 at Amsterdam, republished in Latin in 1719), as a frog changing into a fish.
In this capacity he is sometimes accompanied by the frog-headed goddess Heket.
Of Reptilia Chile is singularly free, there being recorded only eleven species - five saurians, four ophidians, one frog and one toad - but a more thorough survey of the uninhabited territories of the south may increase this list.
The Italian name of calamita, which still persists, for the magnet, and which literally signifies a frog, is doubtless derived from this practice.
It includes about 200 species, distributed over the whole world 1 The word "frog" is in O.E.
They live for some time in water or mud, occasionally entering the bodies of water snails, but undergo no change until they reach the lung of a frog, when the cycle begins anew.
In the frog, lizard, and even bird, it is thin and poorly developed.
==Reptiles and Amphibians== Very little naturalization has been effected, or indeed apparently attempted, in regard to these groups, but the occurrence of the edible frog of the continent of Europe (Rana esculents) as an introduced animal in certain British localities is well known.
Another statue, "The Sluggard," of equal merit, was exhibited in 1886; and a charming statuette of a nude figure of a girl looking over her shoulder at a frog, called "Needless Alarms," was completed in the same year, and presented by the artist to Sir John Millais in acknowledgment of the gift by the latter of his picture, "Shelling Peas."