File:On the anatomy of vertebrates (electronic resource) (1866) (14748650264).jpg

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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alf of the canal. In the Bats the uterus has two very short horns: the longcorpus uteri opens by an os tineas into the vagina: in Pteropusthe vagina extends into a cul-de- sac beyond the os tineas. § 386. In Bruta.—The absence of the valvular or mechanicallimit between uterus and vagina, noticed in certain Insectivora, isan inferior character repeated in the present order of Lissen-cephala. In the Armadillos (Dasypus Peba, e.g.) the uterinewalls gradually become thinner, the epithelium denser andsmoother, and longitudinal furrows finally denote the vagina, 1 Of the two specimens of Centetes setosus transmitted to me by the Hon. W. R.Rawson, Treasurer of the Mauritius, one had brought forth twenty young: he hadknown an instance of twenty-two at a birth, the more usual number being twelve toeighteen. I added dissections of the foetus to the Hunterian Series under theNo. 3577, a, to show the close analogy in form and structure of the male and femaleorgans at that period. VOL. III. Y Y
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Female organs, Rluinchoeyon. cxxxiv. 690 ANATOMY OF VERTEBRATES. which opens into a wide urethra about an inch from the end ofthe clitoris, the groove of which is continued from the urethra.The usual subordinate relations of urethral and vaginal canalsare here reversed. The clitoris in Dasypus 6-cinctus is longerthan in the 9-banded species, measuring nine lines in the un-erect state : it is of a pointed form, covered with a leaden-colouredintegument, and situated an inch anterior to the anus : the vulvais placed on an eminence. From this orifice the urogenital canalextends eight lines, receiving the vagina by a transverse semilunarslit, and being then continued for five lines further without anydiminution of diameter, and terminating in the form of a cul-de-sac, into which the urethra opens by a very small orifice. InDas. Peba, the urogenital cavity is not separated by a corre-sponding contraction from the urinary bladder, but is a moredirect continuation of it. In this Armadillo the

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