72 Merriam Preliminary Synopsis of American Bears. 



space between anterior and posterior parts of tooth on inner side filled by 

 one or more cusplets ; m 2 large and broad, with heel elongate and broadly 

 rounded posteriorly in male ; shorter and more obliquely truncated in 



FIG. 8. Teeth of Yakutat Bear (Ursus dalli), natural size. 



a. I/ast upper premolar. 



b. First upper molar. 



c. I,ast lower premolar. 



d. First lower molar. 



female ; pm 4 large and high, without distinct heel, the main cusp occu 

 pying nearly the whole crown of the tooth ; a strongly developed peg-like 

 accessory cusp usually present on inner side of main cusp a little behind 

 the middle. 



Measurements of skull of type. Greatest length of cranium (front of pre- 

 maxillary to end of occipital crest), 424 ; greatest basal length (gnathion 

 to occipital condyles), 400 ; basal length (gnathion to basion), 366 ; basilar 

 length of Hensel, 360 ; zygomatic breadth, 269 ; occipito-sphenoid length 

 (basion to suture between basi- and presphenoid), 107 ; postpalatal 

 length, 172 ; basion to plane of front of last upper molar, 242 ; interorbital 

 breadth, 92 ; distance between postorbital processes, 134 ; occipito-nasal 

 length, 360; height of brain case above pterygoid, 148; height of brain- 

 case above basisphenoid, 117. 



FIG. 9. Yakutat Bear ( Ursus dalli). 



Remarks. The Yakutat bear is almost as large as the Great 

 bear of Kadiak and the Alaska peninsula. In fact the total 

 length of the skull from the occipital condyles t'o front of in- 



