THE SEA OTTER IN THE EASTERN PACIFIC OCEAN 17 



Figure 10. — The baculum of an adult male sea otter (No. KWK 60-8). Above, 

 dorsal view; middle, ventral view; below, side view. The baculum is at- 

 tached to the ischium by a ligament, composed of the ischiocavernosus and 

 bulbocavernosus muscles, which inserts on the left. (KWK 66-15) 



Figure 11. — Adult male sea otter. The penial and testicular bulges are evident 

 when the outer pelage is wet and slick. They are less apparent when the 

 pelage is dry and fluffy, making identification of sex difficult in the field. 

 Note loose skin pouches beneath each foreleg. These are used to store 

 food organisms as they are gathered from the bottom, until they are eaten 

 at the surface. (KWK 56-29-11) 



