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

  • Hill, Jas. P.
Date:
1899
Catalogue details

Licence: Public Domain Mark

Credit: Contributions to the morphology and development of the female 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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    pleteness I here reproduce the main points in my previous description in explanation of figs. 13, 14 and 15. Fig. 13 represents a section through the common median vagina shortly after the point of union of the two canals. It contains here an irregular detritus, but further back contains fragments of what are apparently greatly degenerated broken-up portions of allantoic stalks. Its lumen becomes continuous ventrally with that of the pseudo-vaginal passage, in which there almost imme- diately appear the sections of three allantoic stalks, a larger and more degenerate one measuring '4 mm. by '3 mm. in diameter and two .smaller ones, each 2 mm. in diameter (fig. 14, all.s.) As the genital organs reached me with only two young, it may be that the larger stalk has persisted from a previous parturition. These three persistent stalks completely occupy the lumen of the passage (fig. 14). The}^ are closely surrounded by a loose con- nective tissue sheath derived from the surrounding tissue, and strands of the same pass in between and steparate the stalks. They are here in a more degenerate condition than in the pre- ceding specimen; the larger one has undergone marked fibrous degeneration, and into all three connective tissue corpuscles have penetrated. Fig. 15 represents a section through the urogenital strand behind the terminations of the allantoic stalks and shows very clearly the cleft-like nature of the pseudo-vaginal passage, here containing a detritus of red blood corpuscles and cellular elements. The urogenital sinus and cloaca were not availalile for examina- tion. iv. /’. obemda, with four 3'7 cm. young. The two median vaginal canals, each with a greatly folded lining, continue back and eventually open into each other to form the here extremely short common median vagina, which extends through only four sections as compared with one liundred and thirty-one in specimen ii. There is now no trace of allantoic stalks in any part of the median vaginal apparatus. The lumen of the median vagina must now be described as ending blindly, since the greatly