On the anatomy of vertebrates (electronic resource) (1866) (14564550867)

Identifier: b20416039_003 (find matches)
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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on. Fromthe upper part of these culs-de-sac the vaginas are con-tinued upward and outward,forming a curve, like thehandles of a vase, thendescend, converge, and ter-minate close together, as inthe preceding example.2 InDasyurus viverrinus andDidelphys Virginiana the mesial culs-de-sac of the vaginaedescend to the urogenital passage, and are connected to it, butdo not communicate with it or with one another: each canal is,then, continued outward from the upper end of the cul-de-sac,and, forming the usual curve, terminates parallel to the orificeof the urethra. The vaginas in the Dasyures are smaller in pro-portion to the uteri than in the Virginian Opossum, but of asimilar form.3 In the Wombat (Phascolomys) each uterus communicates witha separate and large vaginal cul-de-sac, the lining membrane ofwhich is increased by irregular rugas and papillas: the terminalportion of each lateral canal has a thick muscular coat. Theurogenital canal is lined by a thick epithelium, and its surface is
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Female organs, Didelpliys dorsigera. lxxt xx. vol. iv. p. 151, no. 2734 c. 2 xx. vol. iv. p. 3 xx. vol. iv. p. 154, no. 2738 a. 152, no. 2734 e. FEMALE OKGANS OF MARSUFIALIA. 683 broken up into countless oblique rugae and coarse papillae, be-traying a certain regularity in their arrangement: the surfaceimmediately around the urethral orifice is comparatively smooth. In Macropus major the vaginae, fig. 538, e, epreponderate insize greatly over the uteri c, c ; and, the septum, e, of the de-scending cul-de-sac being always more or less incomplete, asingle cavity, e, is thus formed, into which both uteri open; buthowever imperfect the septum may be, it always intervenes andpreserves its original relations to the uterine orifices, d9 d. Inthe specimen examined by me, this part of the vagina was notcontinuous by means of its proper tissue with the urogenitalcanal, but was connected thereto by areolar tissue.1 In Hal-maturus Bennettii I found an aperture of communication be-tween the median