1881.] VAGINAL APPARATUS IN THE MACROPODID/E. 



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The vaginal apparatus of Macropus rufus, natural size. 

 The median vaginal canal and the urogenital sinus have been laid open from 

 the dorsal side. A probe, a, is passed through the posterior unopened 

 part of the median canal ; the projecting orifice of the latter is seen 

 between the two longitudinal folds, lying just dorsad of the opening of 

 the urethra, through which probe b is passed, c c, the posterior openings 

 of the lateral vaginal canals ; c' c', their anterior openings ; d, the 

 opening of the left uterus; ej, the lateral vaginal canals; ur, tbe 

 ureters ; uf, tbe uteri. 



