14 



PKOCEEDINGS OP THE NATIONAL MUSEUM 



greater need for mobility in otariids, which is accomplished partly 

 by a reduction in the width of the joint. 



The paroccipital processes vary greatly in the degree of their 

 distinctness in pinnipeds. In otariids they are apparently always 

 well defined and continuous, by a crest, with the mastoid processes. 



^r^AX. NASO-LKQ- 



presphenr 



pterygoid- 

 alLsphea.' 



baslspKen 



baslocc'ip.-^ 



F. -^TNLOrAKST.' 





F. LKCEHUIA POST./ 



T. COND\L./ 

 Fig. 4. — Ventral view of the skull of Zalophus ; names of bones in small type 



D>&KS>TR\C. 



"RtCT. C^.P. A.NT. MINOR 

 ■T\t.CT. CNP. KKT. rAN3. 



In those phocids in which they are distinct they are never continuous 

 with the latter, but they may be either sharp and projecting 

 {Monachus, Stenorhynchus) , or absent as true processes (Mirounga) , 

 their position being indicated merely by slight swellings in that part 



