. On the anatomy of vertebrates. Vertebrates; Anatomy, Comparative; 1866. 582 ANATOMY OF ortriii^ of Emus cuyojKca. xxxviir. 391 larger than in the marine species: it is sul^cylindrical, with an expanded terminal glans, il:). I, usually ending in a point. The urethral groove, ib. G, ^ ^° extends along the mid- dle of the dorsal surface, and becomes deeper as it approaches the glans : in erection the tumefac- tion of its borders con- verts the groove into a temporary canal, and it then a}i2'>ears to end by an orifice, k, which is usually divided by a jiapillary eminence. The l)
. On the anatomy of vertebrates. Vertebrates; Anatomy, Comparative; 1866. 582 ANATOMY OF ortriii^ of Emus cuyojKca. xxxviir. 391 larger than in the marine species: it is sul^cylindrical, with an expanded terminal glans, il:). I, usually ending in a point. The urethral groove, ib. G, ^ ^° extends along the mid- dle of the dorsal surface, and becomes deeper as it approaches the glans : in erection the tumefac- tion of its borders con- verts the groove into a temporary canal, and it then a}i2'>ears to end by an orifice, k, which is usually divided by a jiapillary eminence. The l)enis consists of two ' corpora cavernosa,' il:). ir, wliich are firm fil)rous Ijodies, cohering raesially and attached to the ventral surface of the cloaca; and of two median tracts, fig. 392, 4, of a more vas- cular erectile tissue, forming; the walls of the mediangroove, 5, and covered by a soft quasi-nracons membrane. Each vascular tract commences by an enlargement, fig. 390, E, analogous to the bul- hus iift'fhra'. The erectile tissue is continued forward, thinly at first, but afterwards increasing in thickness, to the glans, figs. 391, I, and 392, which it chiefly constitutes. On each side of the mid-line of the penis is a canal, fig. 392, /, wliich at one end communicates with the cavity of the peritoneum, and by the other end is prolonged into the substance of the glans, where it terminates, blindly or by a kind of reticulate sinus.' The penis is provided with two retractors, fig. 391, 55, . .xxxvHT. fig. 392, 55', arising from the XX. vol. iv. p. 02, ]irep. no. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Owen, Richard, 1804-1892; Cornell University. College of Veterinary Medicine. Flower-Sprecher Veterinary Library. fmo. London, Longmans, Green
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Keywords: ., bookauthorowenrichard18041892, bookcentury1800, bookdecade1860
