Text-book of comparative anatomy . 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. «-6r- \r Ait1,,, ttz£s aTgg 416, FIG. 228.—A and B, Gills of Astacus fluviatilis. In A the branchiostegite is
Text-book of comparative anatomy . 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. «-6r- \r Ait1,,, ttz£s aTgg 416, FIG. 228.—A and B, Gills of Astacus fluviatilis. In A the branchiostegite is removed. The gillsare seen in their natural position. In 7? the podobranchiae are cut off, and the outer arthrobranchiseturned back downwards. Twice the natural size. O], a->, 1st and 2d antennae; 3, mandible ; ep$,epipodite of the 2d maxilla; 6, 1st maxillipede; 7, 2d maxillipede ; S, 3d maxillipede; 9, forceps(cut-off); 10-13, the 4 succeeding ambulatory feet; pl\, 1st pleopod ; (ib\, 063 1st and 2d abdominalsegments; pdb, podobranchia;; art, inner, art1, outer arthrobranchise; plb, pleurobranchise ; thenumbers attached show the appendages to which the gills belong, in order from before backward,beginning with the anterior antenna as Xo. 1; gh, articular membrane between the body and basaljoint of the protopodite (after Huxley). appendages on the outer lamella? of the abdominal swimming feet(pleopoda). The arrangement of the gills in Siriella (Mysidce)is similar;
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectanatomycomparative
