SKULL. 283 



Matxmrments of the Metacarpal and Phalangeal Bones of an Adult Female* 



Measurements of the Metatarsal and Phalangeal Hones of an Adult Female.* 



SKULL. The skull in Zaloplius calif ornianus, as compared 

 with the skull in allied genera, is remarkable for the narrow- 

 ness and great elongation of the facial portion, which is even 

 much more elongated and slenderer than in Arctoccplialus. In 

 its general configuration (excepting, of course, the great devel- 

 opment of the sagittal and occipital crests in the very old males) 

 it more resembles the Arctocephaliue type than any other. 

 The maximum breadth (i. <?., at the zygomata) in the females 

 barely equals or falls a little short of half the length, while in 

 the old males it rather exceeds this proportion. In very old males 

 the crests of the skull are enormously developed, and, con- 

 trary to what usually obtains in the other genera of this family, 

 are considerably developed in very old females. The superior 

 outline (in old males) slopes rapidly from the high sagittal 

 crest to the end of the nasals. The postorbital processes are 

 long and rather narrow, and are directed backward in old age; 

 the nasals are long and narrow, decreasing in width posteriorly. 

 The superior edge of the intermaxilla? is very narrow, and is 

 prolonged backward nearly to the middle of the nasals. The 

 postorbital cylinder is long and narrow, and often abruptly 

 contracted posteriorly. The bony palate is nearly flat, but little 

 depressed, and is rather deeply emarginate posteriorly. The 

 *Specirnen No. 6159, Coll. Mus. Conip. Zoology. 



