161 



ZOOLOGY 



SECT. 



-m.d 



els 



FIG. 824. The urinogenital organs of Scyllium canicula from the ventral side. 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 dissected away from the kidneys and displaced outwards, 

 and the ureters inwards. <ib. p. depression into which the abdominal pore opens ; rl. cloaca ; 

 els. claspcr ; ef. <l. efferent ducts of spernjary ; k. kidney ; k'., {". anterior non-renal portion 

 of the kidney, forming in the male the so-called " Leydig's gland," which, together with the 

 coiled spermiduct, constitutes the epididymis ; /-;. anterior portion 'of liver*; m. tf. vestigial 

 Mttllerian duct in the male ; oes. gullet ; or. ovary ; oril. oviduct ; ovd'. its coelomic aperture ; 

 ovd". the common aperture of the oviducts into the cloaca ; /. rectum; sli. <jl shell-gland ; 

 x/itt. spermiduct; sp. . sperm-sac; s. r. seminal vesicle; a. >-'. its aperture into the urino- 

 genital sinus; f.s. spermary ; u. y. s. urinogenital sinus; m: ureters; u/. their apertures 

 into the urinogenital sinus ; u. a. urinary sinus. (From Parker's Practical Zoology.) 



