1902.] 



Allen, North Pacific Phocidce. 



the young skull both pm 8 and pm 3 are set obliquely. In another very 

 young skull (No. 38013) from Bering Island, pm 8 is strongly oblique and 

 pm 3 is slightly oblique. In No. 1 14652, a young female, pm* on the left 

 side is oblique, but the corresponding tooth on the right side, and all of the 

 other premolars on both sides stand in a straight line. In No. 38011, a 

 young adult male, from Avatcha Bay, all the upper premolars are set 

 obliquely, while in No. 38012, also a young adult male, only pm 8 , on both 

 sides, is set obliquely, all the other teeth standing parallel to the axis of 

 the toothrow. In No. 38014, a female from Petropaulski, all of the teeth 

 in both jaws are set in straight lines. Thus in the maxillary series pm 2 

 is always strongly oblique to the toothrow, and pm 8 more or less so in 

 male skulls, while only pm 2 , and this apparently rarely, is placed ob- 

 liquely in the female. 



Fig. 8. Phoca stejnegeri. Type ; U. S. Nat. Mus. No. 21310, old male. Crown 

 side views of upper and lower teeth. Nat. size. 



and out- 



In the lower toothrow pm 2 and pm 3 and sometimes pm 4 have a posi- 

 tion strongly oblique to the axis of the toothrow in both sexes, especially 



