664 



DR. P. CHALMERS MITCHELL ON THE 



transvei-se fold (text-fig. 124, A) from tlie second, mucli narrower 

 urodjeum. The paired uretei's open into the latter (text-fig. 1 24, U) 

 on the dorsal surface but leather laterally placed. The actual 

 apertui-es are situated on a small ridge and were very difficult to 

 see, considering the size of the bird. I found them eventually by 

 passing a horse-hair backwards through the ureter, and I think 



A 



U. 



^R 



\r 



Cloaca of Baleeniceps . Ventral view. 



The sphinctei- lias been cut through in the middle ventral line and folded outwards; 

 portions of the dorsal wall of the gut have been removed. 



L.I. Cut end of large intestine. 



A. E^old separating Coprod^um from Urodaeum. 



B. Fold separating Urodteum from Proctodseum. 

 U. Aperture of Ureter. 



G. Genital aperture. 



C. Glandular crj'pts. 



D. Cut sphincter muscle. 



F. Aperture of Bursa Fabricii ; x. Dorsal wall of Bursa. 



it possible, although I am not certain, that there were several 

 very small apertures at each side instead of one lai^ge one. 

 Rather lateral and slightly j^osterior to the ureters were the 

 minute openings of the vasa deferentia (text-fig. 124, 0). There 

 was no genital papilla, but the specimen was a very immatui-e 

 male, and the testes were minute. The vas deferens accompanied 



