260 University of California Publications in Zoology. [Vou 5 
CHARAcTERS.—Size large; coloration of upperparts vandyke 
brown; upper molars enlarged, the last molar proportionately 
much greater than in any other described form. 
CoLoration.—General color of long hairs on upperparts van- 
dyke brown, becoming lighter on cheeks and sides, and deep- 
ening on tail to dark seal brown, the tip quite blackish. Limbs 
above dark like the dorsal region. Underparts walnut brown. 
The scrotum and the tail terminally very dark seal brown; tip 
of chin, an irregular spot on the throat, a wide stripe on the 
chest, a small area at the insertion of the arm, and an irregular 
abdominal and inguinal patch, creamy white. Under fur every- 
where slightly less reddish than mars brown. Ears lighter brown 
than dorsal region. 
Skuuu.—Skull large and heavy, nearly the size of that of 
ingens, with wide spreading zygomatic arches; audital bullae 
short; teeth very large, greatly crowded, the last upper molar 
greatly enlarged; palate narrow. 
Pig. 3.—Lutreola vison nesolestes, Fig. 4.—Lutreola vison energumen- 
new subspecies. Type, No. 201, os (Bangs). No. 3265, 6 ad.; 
6 ad.; Admiralty Island, Alas- Klamath Co., Oregon. X 1. L. 
ka, x1. Iu. Nash; del. Nash, del. 
