. On the anatomy of vertebrates. Vertebrates; Anatomy, Comparative; 1866. POISON-GLANDS OF REPTILES. 563 The Crocodiles have glandular follicles, which open at the anus. Hunter preserved ' a section of the skin of a Turtle {Chelone), to show a gland situated near its anus.'' There is a glandular fossa which opens into the dorsal part of the cloaca, close to the termination of the rectum in most Emydians. The anal bags in Serjients are two in number, of an elongate form, fig. 357, m: they are lodged in the base of the tail, and open into the back part of the cloaca: their excretion has a strong
. On the anatomy of vertebrates. Vertebrates; Anatomy, Comparative; 1866. POISON-GLANDS OF REPTILES. 563 The Crocodiles have glandular follicles, which open at the anus. Hunter preserved ' a section of the skin of a Turtle {Chelone), to show a gland situated near its anus.'' There is a glandular fossa which opens into the dorsal part of the cloaca, close to the termination of the rectum in most Emydians. The anal bags in Serjients are two in number, of an elongate form, fig. 357, m: they are lodged in the base of the tail, and open into the back part of the cloaca: their excretion has a strong, disagreeable, nauseating odour. § 102. Poison-glands of Reptiles.â The gland which secretes the poison in ordinary venomous Serj)ents is situated on each side the head, anterior to the tympanic pedicle, inclosed in a strong capsule, fig. 145, a (p. 227), and partly covered by the muscle analogous to the masseter, ib. e, some of the fibres of which, fig. 374, a, are attached to the capsule, ib. b. On reflecting these, as in fig. 374, the gland, ib. c, is seen /J comjjosed of a series of elongated narrow lobes, extending from the main duct at the lower border of the gland upward and backward. Each lobe poiaon apnnti i u \ir Mpera gives off a series of lobules, which are again subdivided into smaller cteca. Their secretion is collected into the dilated beginning of the duct which conveys it to the base of the poison-fang, f; the bristle e passes from the duct into the j3oison-canal of the fang, the structure of which is described, pp. 396-398 : the gum-capsule, d, of the reserve-fangs, g, is laid open. In Hydrophis the poison-gland is of smaller size, narrow, elongate, broadest beliind, and extended upon the maxillary and ecto- pterygoid bones, in advance of the masseter: its capsule is attached to the tendinous tract (p. 228) detached from the digastricus and ectopterygoid : its duct enters the foremost of the series of four to six small fangs attached to the maxillary. The
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Keywords: ., bookauthorowenrichard18041892, bookcentury1800, bookdecade1860
