72 Merriam — Preliminary Si/nojjsis of American Bears. 



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

 one or more cusplets ; ni ^ large and broad, with heel elongate and broadly 

 ronnded 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. 



j^_^ 



c. I^ast lower premolar. 



d. First lower molar. 



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

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

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

 the middle. 



Meamremeiits of skull of type. — Greatest length of cranium (front of pre- 

 maxillary to end of occipital crest), 42-4 ; greatest basal length (gnathion 

 to occipital condyles), 400 ; basal length (gnathion to basion), ;^66 ; 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 (i'lsus dalli). 



Remarks. — The Yakutat bear is almost as large as tlie fireat 

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

 length of the skull from the occipital condyles to front of in- 



