The animal kingdom, arranged after its organization : forming a natural history of animals, and an introduction to comparative anatomy . of a large rounded scale, deeply notched at its posterior extremity. The shell occupies at least themoiety of the length of the body. This subtribe comprises two genera of Miiller [^Argulus and Califfusi. * The two fore-legs may represent the mandibles of the Decapods ;the four following feet, their maxillte, and the sis hind-legs, theirfoot-jaws : so that the fin-feet of the second part of the shell wouldthence be the representatives of the thoracic legs of
The animal kingdom, arranged after its organization : forming a natural history of animals, and an introduction to comparative anatomy . of a large rounded scale, deeply notched at its posterior extremity. The shell occupies at least themoiety of the length of the body. This subtribe comprises two genera of Miiller [^Argulus and Califfusi. * The two fore-legs may represent the mandibles of the Decapods ;the four following feet, their maxillte, and the sis hind-legs, theirfoot-jaws : so that the fin-feet of the second part of the shell wouldthence be the representatives of the thoracic legs of the higherCrustacea. t The composition of this beak is not well understood. It is evi-dent, from Jurines figure of Argului foliineiit, that it incloses a sucker ; but is it the same with the others ? and what is the numberof the pieces of which it is composed ? This we are ignorant of,although I presume that it consists of a labrum, mandibles, and atongue, which forms the sheath of the sucker. J [Latreille says, * dix dcrni^res paires ;* but he evidently intendedonly x\\cfive posterior pairs, or ten posterior legs.] 446 Fig-. 24.—Arijulus fiJiaceusthe aoimal magnified ;of the iarjre anterior sufeet ; i, ihe siphon ; 4, !length. Argulus, Miill., at first named by me Ozolus, but not sufficiently described. The younger Jurine subsequentlyexamined the species which is the type of the genus, with the most scrupulous attention, observing it in all itsstages. The shield is oval, notched posteriorly, covering the body, with the exceptionof the posterior extremity of the abdomen, and supporting, on a triangular frontalspace termed the clypeus, two eyes, four very minute antenna;, nearly cylindrical,placed in front—of which the superior, very short and 3-jointed, have, at the base, astrong, toothless, recurved hook, and of which the inferior are 4-jointed, with a smalltooth upon the basal joint. The siphon is directed forwards. The legs are twelve innumber. The two anteri
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Keywords: ., bookcentury1800, bookdecade1840, booksubjecta, booksubjectzoology
