72 AN INTRODUCTION TO ZOOLOGY 



into the cloaca. These oviducal openings appear as slit-like aper- 

 tures in the dorsal wall of the cloaca, just in front of the openings of 

 the ureters. Thus the cloaca of the female frog possesses five pores 



leading into it : a pair of genital openings, a pair of urinary openings, 

 and the opening of the bladder. When ripe the eggs are discharged 

 from the ovaries into the ccelom, and find their way forward to the 



