He was more anal than me, so I know everything is in order.
In the dorsal fin they have from 17 to 20 rays, and in the anal fin from 16 to 18; there are from 53 to 59 scales in the lateral line and 54 to 56 vertebrae in the vertebral column.
G, Anal papilla with rectum leading from it.
2, sub-costal; 3, radial; 4, median; 5, cubital; 6, 7, 8, anal nervures.
In Hemiptera this telson is absent, and the anal orifice is placed quite at the termination of the eleventh segment.
Z, Anal aperchief centres still remain in the ectoderm, and the fibrils form e, Heart.
- These start from highly developed and specialized aquatic branchiferous forms, exhibiting a prosoma with six pediform pairs of appendages, an intermediate prae-genital somite, a mesosoma of six somites bearing lamelliform pairs of appendages, and a metasoma of six somites devoid of appendages, and the last provided with a post-anal spine.
HADDOCK (Gadus aeglefinus), a fish which differs from the cod in having the mental barbel very short, the first anal fin with 22 to 25 rays, instead of 17 to 20, and the lateral line dark instead of whitish; it has a large blackish spot above each pectoral fin - associated in legend with the marks of St Peter's finger and thumb, the haddock being supposed to be the fish from whose mouth he took the tribute-money.
The ventral and anal fins are white, tinged with pale red; and the dorsal, pectoral and caudal tipped with black.
There are several curved median and cubital nervures and a single anal, but few cross nervures or areolets.
Ten segments can be distinguished in the tapering abdomen, the ninth frequently bearing a pair of tail-feelers (cerci), and the tenth, attached ventrally to the ninth, having the anal opening at its extremity and performing the function of a posterior limb, supporting and temporarily fixing the tail end of the insect on the surface over which it crawls.
The larvae of Elateridae are elongate, worm-like grubs, with narrow bodies, very firm cuticle, short legs, and a distinct anal proleg.
F, Foot; op, operculum; mn, anal papilla; ry, dry, two portions of unabsorbed nutritive yolk on either side of the intestine.
In the more generalized insects the abdomen evidently consists of ten segments, the hindmost of which often carries a pair of tail-feelers, (cerci or cercopods) and a terminal anal segment.
From another hinder trunk arise the two-branched cubital nervure and three separate anal nervures.
In the hind-wing of many insects the number of radial branches becomes reduced, while the anal area is especially well developed and undergoes a fan-like folding when the wings are closed.
In many insects ten, and in a few eleven, abdominal segments can be clearly distinguished in addition to a small terminal anal segment.
Eleven of these may perhaps " be considered as true segments, but the twelfth or terminal one is different, and is called by Heymons a telson; in it is placed the anal orifice, and the mass subsequently becomes the upper and lower laminae anales.
Wings usually well developed, net-veined; the forewings of firmer texture than the hind-wings, whose anal area folds.
Forewings similar in texture to hind-wings, whose anal area folds fanwise.
The Plecoptera and Orthoptera agree in their numerous Malpighian tubes and in the development of a folding anal area in the hind-wing.
BURBOT, or EEL-Pout (Lota vulgaris), a fish of the family Gadidae, which differs from the ling in the dorsal and anal fins reaching the caudal, and in the small size of all the teeth.
The posterior occlusor muscles lie in a special closed space which Blochmann also regards as coelomic. The posterior end of the intestine is similarly surrounded by a closed coelomic space known as the peri-anal sinus in which the rectum lies freely, unsupported by mesenteries.
PA, Post-anal spine.
42) the six somites of the mesosoma are not fused to form a carapace at an early stage, and they are followed by three separately marked metasomatic somites; the other three somites of the metasoma have disappeared in Limulus, but are represented (From Lankester, loc. cit.) by the unsegmented prae-anal region.
Following the metasoma in Limulus, we have as in Scorpio the post-anal spine - in this case not a sting, but a powerful and important organ of locomotion, serving to turn the animal over when it has fallen upon its back.
The nature of the post-anal spine has been strangely misinterpreted by some writers.
The agreement of the grouping of the somites, of the form of the parapodia (appendages, limbs) in each region, of the position of the genital aperture and operculum, of the position and character of the eyes, and of the powerful post-anal spines not seen in other Arthropods, is very convincing as to the affinity wise suppressed praegenital somite.
38), like that of Limulus and Scorpio, and that lateral spines on the pleura of the somites are frequent as in Limulus, and that neither metasomatic fusion of somites nor post-anal spine, nor lateral pleural spines are found in any Crustacean, nor all three together in any Arthropod besides the trilobites and Limulus - the claim of the trilobites to be considered as representing one order of a lower grade of Arachnida, comparable to the grade Entomostraca of the Crustacea, seems to be established.
In the most highly developed forms the two anterior divisions (tagmata) of the body, prosoma and mesosoma, each exhibit six pairs of limbs, pediform and plate-like respectively, whilst the metasoma consists of six limbless somites and a post-anal spine.
I to 12 are the somites of the opisthosoma; 13, the post-anal spine.
Paf, Post-anal segmented filament corresponding to the post-anal spine of Limulus.
Opisthosoma without trace of appendages; its posterior somites narrowed to opistho form a movable tail for the support of the post - anal sclerite, which has no poison glands.
Post - anal sclerite modified as a long, many-jointed feeler.
Post-anal sclerite short and undivided.
Pa, Post-anal lobe of the male - a conical body with narrow basal stalk.
Pa, Post-anal lobe of the female (compare the jointed filament in Thelyphonus, fig.
Opisthosoma without post-anal scierite and posterior caudal elongation: with frequently a pair of small lobate FIG.
58); 5, the fifth, and 11, the eleventh tergites of the opisthosoma; pa, the conical post-anal lobe.
3 and 4, Appendages of the third and fourth opisthosomatic somites, which are the spinning organs, and in this genus occupy their primitive position instead of migrating to the anal region as in other spiders.
An, The anal aperture.
Opisthosoma was movably articulated to the prosoma, and consisted of from eight to ten segments furnished with movable lateral plates, the anal segment being overlapped dorsally by a laminate expansion of the preceding segment.
The opisthosoma consisted of eight or nine segments, whereof the anterior five or six were very short in the dorsal region, and the posterior three exceptionally large with the anal orifice terminal.
Fins without spines; caudal fin, if present, without expanded hypural, perfectly symmetrical, and supported by the neural and haemal spines of the posterior vertebrae, and by basal bones similar to those supporting the dorsal and anal rays.
The genus Gadus is characterized by having three dorsal and two anal fins, and a truncated or notched caudal fin.
In the cod and haddock the base of the first anal fin is not, or but slightly, longer than that of the second dorsal fin; in the whiting, pout, coal-fish, pollack, hake, ling and burbot, the former is considerably longer than the latter.
The cod, Gadus morrhua, possesses, in common with the other members of the genus, three dorsal and two anal fins, and a single barbel, at least half as long as the eye, at the chin.
In Fredericella belonging to this order it is, however, circular, but the systematic position of the genus is sufficiently indicated by its possession of an "epistoine," a lip-like structure guarding the anal side of the mouth in all Phylactolaemata and absent throughout the Gymnolaemata.
And 13, anal or lanceolate 8.
The limits of the large area formed by the flap over the head and neck (ecr) can be traced, and we note the anal i - papilla showing through FIG.
I, The sub-anal tract of the large nephridium given off near its papilla and seen through the unshaded smaller nephridium.
The oesophagus leads into a remarkable stomach, plaited like the manyplies of a sheep, and after this the intestine takes a very large number of turns embedded in the yellow liver, until at last it passes between the two renal sacs to the anal papilla.
The eggs deposited by the beetle in the ground develop into yellowish-brown wire-like grubs with six legs on the first three segments and a ventral prominence on the anal segment.