236 



NORTH AMERICAN FAUNA 74 



Fig. 135. Tumors of the cervix in some Pacific walruses: upper, posteroventral view 

 (uterine horns at top, bladder at lower right) with cervix opened by ventral incision to 

 expose a small spherical tumor (arrow) in its wall; lower, dorsal view (uterine horns at 

 right) showing the greatly enlarged cervix, in the wall of which was a large tumor 

 (arrow). Scales are in centimeters. (Photos by F. H. Fay) 



