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Show 486 DR. J. MURIE ON SAIGA TARTARICA. [June 9, wardly protuberant. The white fibrous septum known as tbe corpus highmorianum, is linear, rather indistinct, and occupies the mesial axis. Owen f remarks of the Giraffe, where the septum is similarly situated, that, as in the Deer and the Antelope, it thus more readily permits of the expansion of the tubular structures in the rutting-season. The sigmoid flexure of the penis(P.)occurs rather behind the middle or the organ. There are two strong band-shaped retractores penis (R.p) fixed in front of tbe bend ; but delicate fibres are carried beyond, as a membranous-looking sheath. The praeputium (p) is attached by a frsenum 2 inches behind the point of the penis. The attenuated glans has an inferior oblique papillar extension of tbe corpus spongiosum (c. s.), which terminates in a minute orifice, the meatus urinarius. Combined bulbo-cavernosus muscles (B. ci) produce a swelling almost as large as a chestnut. Each ischio-cavernosus (/. c.) is large and fleshy. The continuous tbickish layer of the circular and oblique muscular fibres of the constrictor urethrse (C. u.), 2| inches long, form a powerful sphincter. Two Cowper's glands (C.gli), each as big as a bean, but pedicil-late, are situated on the rectal side of the urethra, and immediately behind the root of the bulb. They are yellow-coloured, moderately firm, and separated from each other by fatty and fibrous tissues. The vasa deferentia (v. d*.) at the upper end of the neck of the bladder approximate, enlarge considerably, and form a thick, smooth, flattened, elongate mass, which fills the superior fissure between a pair of large glands. These glands, as I have noticed in the anatomy of the Prongbuck, may either represent prostate, vesiculae seminales, or both. Considered as the homologue of a bifid prostate (P. gl.), they each are 1*2 inch long, *7 inch deep, and together have a breadth of 0*8 in front, and 1*2 inches behind. In side view they are kidney-shaped, with an inferior mesial indentation. From above, including the enlargement of the vasa deferentia, they are somewhat quadrate, narrowing slightly in front. Their surface is smoothish, with the exception of the indentation above spoken of. A nipple-like process from the vasa deferentia pierces the compressor urethras behind ; and the combined secretion of the testes and prostate enters the urethra by a double orifice ; ejaculatory ducts (e.d.) behind the middle of the membranous portion of the urethra. The kidneys agree with the characters assigned them by Pallas, namely, subglobularly oval, a shallow hilus, and unsyrnmetrieally placed in the loins. As he observes, the right one lies near the last rib, whereas the left one is much nearer the ilium. Both, in the male Saiga, were enveloped in a large mass of suety fat. They are smooth-surfaced, without lobulations. The cortical substance is unusually thick ; and the single deepish sinus has some half dozen undefined pyramids aud infundibula. In the male each kidney measured 2*8 inches long and 1*6 across. Pallas notes that the suprarenal bodies are oblong or oval, green-t Trans. Zool. Soc. vol. ii. p. 239. |