In relation to their parasitic habit one or two suckers are always developed, the one at the anterior and the other at the posterior end of the body.
23 and 25); and, fourthly, in structure, being hollow or solid, as in the polyp. In some medusae, for instance, the remarkable deep-sea family Pectyllidae, the tentacles may bear suckers, by which the animal may attach itself temporarily.
Other genera are Aglauropsis, Gossea and Gonionemus; the last named bears adhesive suckers on the tentacles.
As in the preceding, but with suckers on the tentacles.
The fore-legs of many male dyticids have the three proximal foot-segments broad and saucer-shaped, and covered with suckers, by means of which they secure a firm hold of their mates.
Of birds some 30 kinds are known, an owl being the only bird of prey; parrots, pigeons, kingfishers, honey-suckers, rails, ducks, and other water birds are numerous.
Buffalo-fish, paddle-fish, cat-fish, drum, crappie, black bass, rock bass, German carp, sturgeon, pike, perch, eels, suckers and shrimp inhabit the waters of the Mississippi and its tributaries, and oysters, shrimp, trout, Spanish mackerel, channel bass, black bass, sheepshead, mullet, croakers, pompano, pin-fish, blue-fish, flounders, crabs and terrapin are obtained from the Mississippi Sound and the rivers flowing into it.
Instead of these it has moundmaking turkeys, honey-suckers, cockatoos and brush-tongued lories, all of which are found nowhere else in the world.
The wall-eyed pike taken in 1902 were valued at $16,915 (210,936 lb); white fish, $5777 (80,191 lb); pickerel, $4144 (51,711 lb); yellow perch, $ 2 575 (43,9 1 7 lb); sturgeon, $20 5 1 (1 5,59 0 lb), and suckers, $ 18 54 (37,375 lb); other varieties taken in smaller quantities included smelt, sun-fish and eels.
One or two (anterior and posterior) suckers always present.
No buccal appendages or suckers; a very long evaginable proboscis; a quadriradiate terminal branchia.
Head very large, not marked off from the body; neither branchia nor suckers; fins situated near the middle of the body.
The ticks (Ixodes) are not only injurious as blood-suckers, but are now credited with carrying the germs of Texas cattle-fever, just as mosquitoes carry those of malaria.
The former bears two terminal suckers on the flattened dorsal and ventral surfaces, the latter six hooks near the tip of the tail.
The nervous system consists of a ring below the suckers and of a large number of radially arranged tracts running forwards and backwards.
It bears adhesive organs that are either suckers or hooks, and may develop into the most varied outgrowths in order to give increased firmness of attachment to its host.
These complex organs have apparently arisen by the increase in depth and differentiation of an accessory sucker such as is borne on the phyllidia of the former group. Lastly, the scolex of the more familiar Taeniidae (Tetracotylea) carries a rostellum encircled with hooks and four cup-shaped suckers the margins of which do not project beyond the surface of the body.
It seems probable that these suckers are not the true " bothria " but are developed from accessory suckers, the bases of which have disappeared almost completely.
B, head showing the suckers, proboscides and excretory canals; X 25.
The four suckers are here united to form two pairs or fused into a single pair.
Internal to the suckers are the four complex hooked proboscides.
B, invaginated head of a Cysticercus before the formation of the suckers; X 25.
The thicker portion develops a terminal muscular rostellum and two or four suckers, the thinner end (" tail ") is vesicular, more or less elongated, and contains the six embryonic hooks.
(From Lankester's Treatise on Zoology, part iv.) the base of the tail; nervous and muscular systems arise; and finally the rostellum and suckers become completely enclosed in the sac formed by the lateral extension of the " hind-body."
Scolex with four suckers, rarely hooked, and with a rostellum.
Most bats are insect-eaters, but the tropical "flying foxes" or fox-bats of the Old World live on fruit; some are blood-suckers, and two feed on small fish.
As one result of the topping, suckers are usually formed; these also must be removed, although, e.g.
In Florida, vigorous suckers are sometimes allowed to remain when the plant is cut, and produce a " sucker crop " inferior in character to the first or principal crop, but still serviceable.
Careful examination of a large number of individuals of one variety growing under similar conditions reveals differences in such characters as number of leaves per plant, the size and shape of the leaves, tendency to form suckers, time of maturing and resistance to disease.
They are flattened organisms provided with two or more suckers, hence their name (7 rpThµarc,8rls, pierced with holes), and are exclusively parasitic both in their earlier and mature stages of life.
The ventral surface is characterized by one or more suckers and apertures.
The mouth lies usually in the centre of the anterior vzs and sub-terminal sucker or between two adoral suckers, but in Gasterostomum and its allies it is mid-ventral.
C, Epibdella hippoglossi (from Halibut); ms, the two adoral suckers with the mouth (m) between them; ps, ventral sucker; ov, ovary, to testes.
Intestine; sc; posterior suckers; yk, yolk-glands.
The Trematodes are divided into three orders, primarily distinguished by the character of their suckers, viz.: Heterocotylea, Aspidocotylea and Malacocotylea.
- Ectoparasitic Trematodes, in which a large posterior adhesive apparatus is present and is usually accompanied by a pair of suckers placed anteriorly in relation to the mouth.
Into a number of independent suckers set on a disc or "cotylophore."
In the former position the suckers are developed and growth proceeds for 8 to Io weeks until the metamorphosis of its host.
In addition to these suckers the sides of the anterior region may become infolded and give rise to an accessory adhesive organ (Holostomidae).
When that occurs, the cyst is dissolved and the minute fluke works its way down the alimentary canal into some part of which it inserts its suckers and commences to feed on the blood of its host.
LAMPREY, a fish belonging to the family Petromyzontidae (from r rpos and Ww, literally, stone-suckers), which with the hag-fishes or Myxinidae forms a distinct subclass of fishes, the Cyclostomata, distinguished by the low organization of their skeleton, which is cartilaginous, without vertebral segmentation, without ribs or real jaws, and without limbs.
A third genus, Chonopeltis (Thiele, 1900), has suckers, but has lost its first antennae, at least in the female.
The plant is propagated from suckers and requires very little attention after transplanting to the field where it is to remain, but it takes six to eight years to mature and then yields an average of ten gallons of sap during a period of four or five months, after which it dies.
Many of the lakes and rivers have been stocked with trout and salmon or bass; some, with smelt; the fresh waters of the state also contain pickerel, perch, pouts, eels, suckers, dace, sunfish and shiners.
The most typical family is the Drepanidae, so named for the stout sickle-shaped beak with which the birds extract insects from heavy-barked trees; Gadow considers the family American in its origin, and thinks that the Moho,' a family of honey-suckers, were later corners and from Australia.
The suckers of a mollusc, the socket of the thigh-bone, &c.; and in botany for the receptacle of Fungi.
- Root suckers are young shoots from the roots of plants, chiefly woody plants, as may often be seen in the case of the elm and the plum.
Stem suckers are such as proceed from the base of the stem, as is often seen in the case of the currant and lilac. They should be removed in any case; when required for propagation they should be taken with all the roots attached to them, and they should be as thoroughly disbudded below ground as possible, or they are liable to continue the habit of suckering.
Trees to be grown in the form of a bush are usually budded low down on the stem of the stock as near the root as possible to obviate the development of wild suckers later on.
Remove from raspberries and strawberries all suckers and runners that are not wanted.
Propagate all sorts of herbaceous plants by rooted slips or suckers; take off layers of carnations, picotees and pansies.
In some cases the embryo or the embryo-sac sends out suckers into the nucellus and ovular integument.
The aspen is readily propagated either by cuttings or suckers, but has been but little planted of late years in Britain.
It may be propagated by suckers and layers, by grafting and by sowing.
Suckers afford the strongest and earliest-bearing plants.
Grafted filberts are less liable than others to be encumbered by suckers at the root.
They are similar to those found in rivers; but as there are no suckers nor lampreys here, I know not by what fish they could be made.