142 MUSTELA. LUTRA. 



6; length of mandible, 14.4; length of lower molar series, 7.3. Ex 

 type in United States National Museum. 



Mustela peninsulas olivacea Howell. 



Mustela peninsula olivacea Howell, Proc. Biol. Soc. Wash., XXVI, 

 1913, p. 139. 



Type locality. Autaugaville, Alabama. 



Genl. Char. Like M. peninsula, but paler in winter. Skull with 

 broad braincase, wide zygomata; inflated bullae and heavy molars. 



Color. Summer. Head Vandyke-brown; small white spots be- 

 tween eyes; upperparts mummy-brown, this color extending over 

 flanks on to belly; underparts cartridge-buff ; toes of front feet cream 

 color, those of hind feet whitish; tail like back, tip black. 



Winter. Upperparts buffy brown; head darker; white patch 

 behind eyes; underparts straw-color blotched with cartridge-buff; 

 toes of fore feet cream-buff, of hind feet whitish; tail buffy brown, tip 

 black. Ex type in United States National Museum. 



Measurements. Total length, 420; tail, 140; hind foot, 50. Skull: 

 Occipito-nasal length, 49.1; Hensel, 46.1; zygomatic width, 29.3; 

 intertemporal width, 9; length of nasals, 6; palatal length, 21.6; 

 length of upper molar series, 11.5; length of mandible, 30; length of 

 lower molar series, 13.8. Ex type in United States National Museum. 



Subfamily Lutrinae. 



Genus Lutra (131). 



Lutra latidens Allen. 



Lutra latidens Allen, Bull. Am. Mus. Nat. Hist., XXIV, 1908, p. 

 660. 



Type locality. Lavala, Matagalpa, Nicaragua. 



Color. Head and upperparts snuff-brown; varying in depth of 

 shade according to the light; flanks paler; outer side of limbs like 

 back; chin and throat pale fulvous; rest of underparts and inner 

 side of hind legs pale brown; tail like back. Ex type in American 

 Museum of Natural History. 



Measurements. Total length, 1280; tail, 490 (collector). Skull 

 is broken into small pieces, so general measurements cannot be given. 

 Length of the molar series, including as usual the premolars, 37.5; 

 length of lower molar series, 37.5; length of mandible, 72; length of 

 pms, 16; width at middle, 8; width near posterior border, 7.6. Ex 

 type in American Museum of Natural History. 



