I05; postpalatal length, 167; basion to plane of front of last upper 

 molar, 238; interorbital breadth, 98; distance between postorbital 

 processes, 132.5; occipito-nasal length, 358; height of brain case 

 above pterj-goid, 160; height of brain case above basisphenoid, 123. 

 (Merriain.) 



No measurements of the bod}' of this bear have been recorded, 

 but among a number of individuals the size varies greath-, some be- 

 ing comparatively small. 



469. dalli. {Ursus), Merr., Proc. Biol. Soc. Wash., 1896, p. 71, figs. 

 8, 9, p. 72; pi. V, fig. i; pi. vi, fig. 5. 



*si(kensis, Merr., Proc. Biol. Soc. Wash., 1896, p. 73, pi. \i, fig. 

 i; pi. V, fig. 3. 



Type locality. Yakutat Bay, Alaska. 



Geogr. Distr. Coast country between Copper River to and in- 

 cluding Baranof Island, Alaska. 



Genl. Char. Size slightly less than the Kadiak bear; skull long 

 and massive; frontals rather flat and only slightly elevated above 

 orbits; postorbital processes strongly developed and decurved in old 

 age; par-occipital process very large and heavy, but relatively short. 

 Molariform teeth large and heavy; fourth upper premolar extraordi- 

 narily large and high, nearly as broad as long, quadrituberculate (an 

 accessory cusp on inner side in front of posterointernal cusp), lower 

 first molar much as in the grizzlies, the interspace between anterior 

 and posterior parts of both on inner side fitted by one or more cusp- 

 lets; upper second molar large and broad, with heel elongate and 

 broadly rounded posteriorly in male; shorter and more obliquely 

 truncated in female; fourth lower premolar large and high without 

 distinct heel, the main cusp occupying 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. 



Mt-asurements of Skull of Type. Greatest length of cranium, 

 424; greatest basal length, 400; basal length, 366; Hensel, 360; zygo- 

 matic breadth, 269; occipito-sphenoid length, 107; postpalatal 

 length, 172; basion to plane of foot of last upper molar, 242; inter- 

 orbital 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. (Merriam.) 



Color. No description of the color of this bear nor any meas- 

 urements than those above have been given. 



* I agree with Mr. Lydekker, P. Z. S.. 189;. p. ^16, that the district in which these bears are 

 found is too limited to admit of two species so closely allied, and differences in skulls and cheek 

 teeth among individual mammals of the same genus are easily found. 



