264 COMPARATIVE ANATOMY AND PHYSIOLOGY. 



Fig. 110. Renal and Generative Organs of 



Ericulus sct(j8us. , 



course ; thus in 

 Gymnura they 

 open into, and in 

 Ericulus near, the 

 neck (Fig. 110); 

 in in an th ey e n te r 

 the walls of the 

 bladder at its 

 base, but run in 

 its walls for 

 about three- 

 quarters of an 

 inch before open 

 ing into the ca- 

 vity of the blad- 

 der ; in the rab- 

 bit they open far 

 up on the hind 

 wall, and in the 

 coney at the top. 

 Thebladderitself 

 varies consider- 

 ably in size and 

 form ; when, as 

 in the higher 

 forms, the cloaca 

 disappears, the 

 urino-genital ori- 

 fice is in front of 

 the anus, 

 page 170.) 



Kidneys ; /, testes ; 

 ut, ureter ; ?-'d, vas 

 deferens ; 6, bladder; 

 pg, prostate gland ; 

 eg, Cowper's gland ; 

 lp t levator penis; cc, 

 cystic urethra; pr. 

 prepuce, divided and 

 reflected ; p, penis. 

 lAf ter Dobson.) 



