THE REPRODUCTIVE ORGANS. 



97 



diverticulum of tlie vas deferens, near its posterior end, which 

 serves as a receptacle for the semen. 



Wd M 



Fia. 27. — Diagram exhibiting the relations of the female (the left-hand figure, $ ) and of tha 

 male (the right-hand figure, $ ) reproductive organs to the general plan (the middle fig- 

 ui*e) of these organs in the higher Vertebrada. 



CI, the cloaca ; iJ, the rectum ; Bl, the urinary bladder ; IT, the ureter ; K, the kid- 

 ney; Uh, the urethra; (r, the genital gland, ovary, or testis; TF, the "Wolffian body; 

 W(l, the Wolffian duct; M, the Miillerian duct; Pst, prostate gland; Qj, Cowper''8 

 gland ; Csp, the corpus spongiosum ; Cc, the corpus cavernosum. 



In the female, F, the vagina ; Ut, uterus ; Fp, the Fallopian tube ; Gt, Gaertner's 

 duct; P.», the parovarium; A, the anus; (7c, Csp, the clitoris. In the male, Csp, (7c, 

 the penis ; Ut, the uterus masculinus ; F«, vesicula seminalis ; Fc?, the vas deferens. 



If the Wolffian bodies, the genitalia, and the alimentary 

 canal of a vertebrate embryo, communicated with the exterior 

 by apertures having the same relative position as the organs 

 themselves, the anus would be in front and lowest, the Wolf- 

 Qan apertures behind and highest, and the genital apertures 

 would lie between the two. But the anal, genital, and uri- 

 nary apertures are found thus related only among certain 

 groups of fishes, such as the Teleostei. In all other Vertehrata 

 there is either a cloaca^ or common chamber, into which the 

 rectum, genital, and urinary organs open ; or, the anus is a 



