492 



MB. J. BBAHAM KKRR OX 



Text-fig. 53. 



.M D 0. 



') 



K -"' 



A. View of the genito- urinary appa- 



ratus of a (breeding) male 

 Protojjteru* annectetu, as seen 

 from the ventral aspect. The 

 greater part of the ca-cum has 

 been cut away, and, for the sake 

 of clearness, the posterior por- 

 tion of the vestigial Mullerian 

 ducts is omitted in the figure. 



B. Figure on larger scale, showing 



the relations of the vestigial 

 posterior end of the Mullerian 



duct- 



C. Oloacal ofeettm. 



K r Kidney (mesonephros). 

 K^. Posterior genital region 

 of kidney. 

 M.D. Conjoined posterior ends 

 of Mi'illerian ducts. 

 M.D.O. Coelomic funnel of Mul- 

 lerian duct. 

 T v Formative regic;n of testis. 

 T ,. Vesicular region of testis. 

 U.QrJB. Urogenital papilla, with 

 the slit-like openings of 

 the Wolffian duets. 

 W.D. Wolffian duct. 



— U.G.P. 



The genito-urinary apparatus of Protoptenu. 



