492 



MB. J. GEAHAM KEEB OJV 



Nov. 19, 



Text-fig. 53. 



,.M.D 0. 



A. View of the genito-ui-inary appa- 



ratus of a (breeding) male 

 Protojjtenis annectens, as seen 

 from the ventral aspect. The 

 greater part of the cajciun has 

 been cut away, and, for the sake 

 of clearness, the posterior por- 

 tion of the vestigial Miillerian 

 ducts is omitted in the figure. 



B. Figure on larger scale, showing 



the relations of the vestigial 

 posterior end of the Miillerian 

 ducts. 



C. Oloacal CEeoum. 

 K^. Kidney (mesonephros). 

 Ko. Posterior genital region 

 of kidney. 

 Conjoined posterior ends 

 of Miillerian ducts. 

 M.D.O. Ooelomic funnel of Miil- 

 lerian duct. 

 Formative region of testis. 

 Vesicular region of testis. 

 U.Gr.P. Urogenital papilla, with 

 the slit-like openings of 

 the Wolffian ducts. 

 W.D. Wolffian duct. 



M.D. 



T... 



— U.G.P. 



Tlie genito -urinary apparatus of Protopterus, 



