322 CALLOEHINUS URSINUS NORTHERN TUR SEAL. 



transverse and vertical diameters equal; in the females the 

 posterior nares are depressed, their transverse diameter being 

 greater than the vertical. The nasal bones are much broader 

 in front than behind. 



The lower jaw is strongly developed, but relatively less mass- 

 ive than in Uumetopias. The coronoid processes are high and 

 pointed, but much more developed in the males than in the 

 females. The ramial tuberosities are greatly produced, espe- 

 cially the hinder one. 



FlO. 41. CaUorhinus itr^inus. Fomcale. 



Fig. A2.CallorM7tus ursinim. Feuialo. 



