(1399 ) 



the Wolffian duct grows forlli and takes its course archwise through 

 the mesorcliium in the testicle. (Fig. 4 id. //.). Here is brought about 

 in one place (Dasyurus) a connection with the future spermatic tubes, 

 which are still present in the stadium of solid cords of cells. 



The mesonephridial tubules disappear almost quite, so that at a certain 

 stadium (Dasyurus viverrinus 53 m.m.) the Woftian duct, strongly 

 grown forth in length, runs twisting through the mass of tissue, which 

 must be considered as the epididymis, without any appearance of 

 tubules in the form of the coni vasculosi. 



Fig. L 



Relation of the genital ducts 



to the testicle. 

 t. Testicle. 

 m. Mesorchium. 

 m.g. Remnants of the Miillerian duct. 

 w.g. Woltïian duct (vas deferens). 

 ^.6'. Genital cord. 

 s.u.g. Sinus uro-genitalis. 

 v.a. Vas aberrans. 



Relation of the genital duct 

 to the testicle. 

 t. Testicle. 

 7)1. Mesorchium. 

 m.g. Remnants of the Miillerian duct. 

 d.r/. Glandule part in the epididymis. 

 iv.g. Wolffian duct (vas deferens). 

 g.s. Genital cord. 

 s.u.g. Sinus uro-genitalis. 



Meanw^hile the Miillerian duct is for the greater part reduced. The 

 cranial extremity remains as a remnant of the duct either beginning 

 with an ostium abdoiuiualo or not, and oudiuu- caudally blind in the 

 epididymis tissue. 



