ci/d." 



"ab.p 



A B 



FIG. 349. The URINOGENITAL ORGANS OF Scyllium canicula. (From Parker's 



Practical Zoology.) 



A, male, and B, female. Only the anterior end of the gonad is represented in 

 each figure, and except that in B both kidneys are shown, the organs of the 

 right side only are drawn. In A the seminal vesicle and sperm-sac are dis- 

 sected away from the kidneys and displaced outwards, and the urinary ducts 

 inwards. 



ab.p, depression into which the abdominal pore opens ; el, cloaca ; els, clasper ; 

 ef.d, vasa efferentia extending between the testis and the anterior section of 

 the mesonephros ; e.p, k', middle section of mesonephros ; k, posterior section 

 of mesonephros; Ir, anterior portion of liver; m.d, vestigial Miillerian duct 

 in the male ; oes, gullet ; ov, ovary ; ovd, oviduct (Miillerian duct) ; ovd' 

 common coelomic and ovd", cloacal aperture of oviducts ; r, rectum ; sh.gl, 

 shell-gland ; spd, Wolffian duct (vas deferens) ; sp.s, sperm-sac ; s.v, vesicula 

 seminalis, and s.v', its aperture into the urinogenital sinus ; ts, testis ; u.g.s, 

 urinogenital sinus ; ur, ducts of posterior section of kidney, and ur' their 

 apertures into the cloaca ; u. s, urinary sinus of female. 



