Text-book of comparative anatomy . alled gills andthe cephalo-thorax; pc, pericardium; 7i, heart: sa, -\ , • ,1 • j sternal artery; Z, nepitopancreas; d, intestine; respiratory plates 111 this Order abm, ventral longitudinal muscles running to the have already been described. The abdomen ; dbm, dorsal longitudinal muscles run- crj^Jg of the PlllllloDodil are 6DlDodial ning to the abdomen; b»i, ventral chord; sn, to subneural vessel; bf, ambulatory foot; vs, ventral appendages, perhaps COlTCSpOnd- sinus; oi, ovary. The arrows indicate the direc- ing with the gills of the Thora- tion in which th
Text-book of comparative anatomy . alled gills andthe cephalo-thorax; pc, pericardium; 7i, heart: sa, -\ , • ,1 • j sternal artery; Z, nepitopancreas; d, intestine; respiratory plates 111 this Order abm, ventral longitudinal muscles running to the have already been described. The abdomen ; dbm, dorsal longitudinal muscles run- crj^Jg of the PlllllloDodil are 6DlDodial ning to the abdomen; b»i, ventral chord; sn, to subneural vessel; bf, ambulatory foot; vs, ventral appendages, perhaps COlTCSpOnd- sinus; oi, ovary. The arrows indicate the direc- ing with the gills of the Thora- tion in which the blood flows (after Huxley and i Plateau). In the Leptostraca (Neoaha), besides the delicate shell-fold, the lamellate thoracic feet function ina special manner as respiratory organs. Their two branchial plates(epipodite and exopodite) correspond with the branchial and respiratoryplates of the Phyllopoda. The branchial plate (epipodite) of theproximal joint of the protopodite is morphologically equivalent to aDecapodan FIG. 227.—Transverse section through, thecephalo-thorax of the Cray-fish near the heart,diagrammatic: M, Branchiostegite ; k, gills ; kh, V CR USTA CE A—GILLS 327 In the Isopoda the delicate-skinned lamella of the pleopoda servefor respiration, either both the lamella? of a foot or only the inner, theouter one being hard-skinned and serving as a covering plate to protectthe inner one. The gills of the Stomatopoda (Squillo.) are found as branched
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectanatomycomparative
