. The Cambridge natural history. Zoology. In Otolithus (Fig. 180) two short tubular canals are given off from the antero-lateral angles of the bladder, each sub- sequently dividing into two elongated, tapering sacs, of which one is directed forwards and the other backwards. In C'orvina lobata (Fig. 181) the lateral margins of the bladder are everywhere fringed with a series of tufts of caeca, each tuft being connected by a short common canal with the cavity of the organ. In the " Drum " {Pogonias chromis) (Fig. 182) each side of the anterior third of the air-bladder has a series of d
. The Cambridge natural history. Zoology. In Otolithus (Fig. 180) two short tubular canals are given off from the antero-lateral angles of the bladder, each sub- sequently dividing into two elongated, tapering sacs, of which one is directed forwards and the other backwards. In C'orvina lobata (Fig. 181) the lateral margins of the bladder are everywhere fringed with a series of tufts of caeca, each tuft being connected by a short common canal with the cavity of the organ. In the " Drum " {Pogonias chromis) (Fig. 182) each side of the anterior third of the air-bladder has a series of digitately branched caecal appendages, the most posterior of which on each side are con- nected by a tubular canal, also bearing branched caeca, with the corresponding postero-lateral extremity of the bladder. CollicMhys ^ has a still more remark- able arrangement. In this Sciaenoid (Fig. 183) twenty-five tubular branches are given off from each side of the bladder, all of which soon subdivide into a dorsal and a ventral division. These still further divide, and their branches either end blindly or are prolonged into a series of arches to the mid-dorsal or mid-ventral line as the case may be, where they become con- tinuous with the corresponding branches of the opposite side. The series of dorsal branches, enveloped in their peritoneal investment, extend between the body of the air-bladder and the roof of the body- cavity, while the corresponding ventral branches, similarly invested, surround that part of the coelom which contains the stomach, intestine, and liver. {d) In addition to the subdivision of the cavity of the air-bladder by the externally obvious, trans- FiG. 180.—Air-bladder of Otolithus. (From Cuvier aud Valenciennes.) ^^ffk. Fro. 181.—Air-bladder of Corvlna lobata. (From Cuvier and Valenciennes.) ' Giinther, Brit. Mus. Cat. Fishes, ii. 1860, p. Please note that these images are extracted from scanned page images that may have been digitally enhanced for r
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1895
