Contributions to the morphology and development of the femal urogenital organs in the marsupialia / by Jas. P. Hill.

  • Hill, Jas. P.
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Licence: Public Domain Mark

Credit: Contributions to the morphology and development of the femal urogenital organs in the marsupialia / by Jas. P. Hill. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    unexpected occurrence of the direct median passage in Dasyurus impressed on me the necessity of testing the above assumption by the examination of serial sections of the median vaginal apparatus in Trichosurus, with the result that a pseudo-vaginal passage was also found to occur in this form. The female genital organs of Trichosurus were described and figured by Brass* in 1880, and in the following year W. A. Forbes, t in a paper on the Koala, very shortly, in a footnote, refers to the uteri and median vaginal apparatus without alluding to Brass’s account. According to the latter author, the uteri open “indie, von Vaginae gebildeten, colossalen Blindsacke. Dieselben sind in dcr Mittellinie vollstiindig durch ein Septum von einander yeschie- den und bis hinab zum Sinus urogenitalis verlangert ohne jedoch in denselben einzumiinden ” (p. 13. Italics mine). His fig. 1 of Taf. ii., representing the organs from the dorsal side, shows the median vaginal apparatus ending abruptly in contact with the approximated posterior portions of the lateral vaginal canals, while his fig. 2, repre.senting a horizontal section, shows the same part terminating freely behind and unconnected in any way with the lateral canals. I would again point out that such repre- sentations of the relations of these parts are wholly inaccurate. The posterior section of the median vaginal apparatus of 'Tricho- surus passes down to enter, and lies imbedded in, the connective tissue, which also encloses the posterior portions of the lateral vaginae and the urethra. According to Forbes, “each os tincae projects as a prominent and quite free papilla into the common vaginal chamber, formed by the coalescence and fusion of the two diverticula present in Phascolomys and Phascolarctos. This chamber is capacious and has only a very slight indication of a median partition left ” (p. 190. Italics mine). * Beass, a. “ Beitrage zur Kenntniss des weiblichen Urogenitalsystems der Marsupialen.” Inaug. Diss. Leipzig, 1880. t Loc. cit. (ante), p. 190. Footnote.