306 



COMPARATIVE ANATOMY. 



broader and more compact posterior portion. The latter gives rise 

 to the functional kidney (Fig. 240, N), while the former becomes 

 connected in the male with the generative organs. Delicate ducts, 



711, 



a 



Ov.~- 



FIG. 240. DIAGRAM OP THE URINOGENITAL SYSTEM OF A MALE (A) AND FEMALE 

 (B) UEODELE ; FOUNDED ON A PREPARATION OF Triton tceniaius. (After 

 J. W. Spengel.) 



Ho, testis ; Ve, Ve, vasa efferentia of testis, which fall into the longitudinal canal of 

 the Wolffian body, t ; a, collecting tubes of the niesonephros, which fall into 

 the Wolffian (urinogenital or Ley dig's) duct (Ig, Ig} ; the latter serves in the 

 female (Fig. B, Ig) simply as the urinary duct (Ur) ; the system of the vasa 

 efferentia (testicular network) is here rudimentary ; mg, mg 1 (Od), Miillerian 

 duct ; Ot, peritoneal aperture of latter in the female ; Ov, ovary ; GN, anterior 

 sexual portion of kidney (parorchis of the male) ; N, posterior non-sexual portion 

 of kidney. 



or vasa efferentia, pass out from the testis (Fig. 240, A, Ho, Ve, 

 Ve) into the substance of the anterior portion of the kidney, and there 

 open into the urinary tubules ; they may either enter the kidney 



