UQP 



Figs. 332-337. — Urinogenital ducts and their external openings. 332. Cyclostome, 

 Petromyzon. (After W. K. PARKER.) 333. Shark, J. 334. Chimseroid, juv. <J. 335- 

 Ceratodns. 336. Ganoid, "J . 337. Teleost (Salmonoid), 5. (After BOAS.) 



A Anus. AP. Abdominal pore. CL. Cloaca. G. Genital opening. MD, MD . 

 Left and right Miillerian ducts. OFD, OVD' . Left and right oviducts (not Miillerian 

 ducts), i?. Rectum, f/, t/'. Left and right ureters. f/G. Urinogenital opemng. UG' , 

 UG". Left and right urinogenital ducts. UGP. Urinogenital papilla, showing distal 

 opening. UGS. Urinogenital sinus. UP. Urinary papilla. 



267 



