File:Image from page 627 of "On the anatomy of vertebrates (electronic resource)" (1866) (14732632016).jpg

Identifier: b20416039_001 Title: On the anatomy of vertebrates [electronic resource] Year: 1866 (1860s) Authors: Owen, Richard, 1804-1892 Subjects: Anatomy, Comparative Vertebrates Fishes Reptiles Mammals Birds Publisher: London : Longmans, Green Contributing Library: Wellcome Library Digitizing Sponsor: Wellcome Library

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Text Appearing Before Image: Male organs, Draco 582 ANATOMY OF VERTEBRATES. 390

Text Appearing After Image: Male organs of Emys europcea. xxxvm. larger than in the marine species: it is sub cylindrical,, with anexpanded terminal glans, ib. I, usually ending in a point. The urethral groove, ib. G,extends along the mid-dle of the dorsal surface,and becomes deeper asit approaches the glans :in erection the tumefac-tion of its borders con-verts the groove into atemporary canal, and itthen appears to end byan orifice, K, which isusually divided by apapillary eminence. Thepenis consists of two i corpora cavernosa, ib. H, which are firmfibrous bodies, cohering mesially and attached to the ventral surface of the cloaca; and of two median 391 tracts, fig. 392, 4, of a more vas-cular erectile tissue, forming thewalls of the mediangroove, 5, andcovered by a soft ^wasz-mucousmembrane. Each vascular tractcommences by an enlargement,fig. 390, E, analogous to the bul-bus urethrce. The erectile tissueis continued forward, thinly atfirst, but afterwards increasingin thickness, to the glans, figs.391, i, and

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