very light zygoma and narrow frontal and rostral regions. Audital 

 bullae small. 



Color. Deep lustrous seal brown to black all over except cheeks, 

 upper lips, chin and under side of neck, which are grizzled brown, 

 palest on cheeks, under fur light grayish brown at base and gradu- 

 ally darkening to deep rich brown at tips. 



Measurements. Total length, 998; tail vertebrae, 358; hind foot, 

 126. Type young adult male. 



83. Latax. 



I. £:3 c. i=l; p. 3i:3; M. "=• = 32. 



2—2' 1— i' 3—3 s— 2 -' 



Latax. Gloger, Nov. Act., Ac. Caes. Leop. Carol., 1827, pt. 2, p. 511. 

 Type M. luiris, Linn. 

 jPttjiZjOken, Lehrb. Naturg, 1816, Th. iii,p.986. (necScopoli.) 

 Enhydra, Flem., Phil. Zool., 1822, 11, p. 187. (nee Enhydris, 



Merrem, Amph., 1820). 

 Only four incisors in lower jaw; molars massive, cusps rounded 

 smooth; upper molar and posterior upper premolar somewhat oval; 

 anterior lower premolar largest of the lower teeth; skull similar to 

 that of Lutra; hind feet larger, flat, fin-like; fifth toe longest, rest 

 diminishing to the first; claws moderate; tail obtuse, one-fourth the 

 length of head and body. 



522. lutris. (Mustela), Linn. Syst. Nat., i, 1766, p. 66. 



marina, Erxleb. Syst. Regn., 1777, p. 445. 



orientalis, Oken, Lehrb. Natur., 1816, 1 11, p. 986. 



stelleri. Less. Man. Mamm., 1827, p. 156. 



gracilis, Fisch. Syn. Mamm., 1829, p. 229. 



Type locality. "America Septentrionali." 



Geogr. Distr. North Pacific, south to California? Nearly extinct 

 on American shores. 



Genl. Char. Hind feet very broad, webbed soles furry; fore feet 

 very small, palms naked; tail flattish, smooth, one-fourth length of 

 body. Only four lower incisors. 



Color. Adult. Black, frosted with white tipped hairs; head and 

 neck grayish white or yellowish white. 



Measurements. Total length, about 1050; tail vertebrae, 330; hind 

 foot, 150; width, 100. Skull: occipito-nasal length, iii;Hensel, 109; 

 zygomatic width, 98; interorbital constriction, 28; mastoid breadth, 

 96; palatal length, 56; length of brain case, 62; length of first lower 

 molar, 15; width, 13; length first upper molar, 7; width, 11. 



