140 MUSTELA. 



Genl. Char. Size very small; tail exceedingly long; skull large 

 and heavy; teeth large; canines long, narrow. 



Color. Top and sides of head black graduating into chestnut- 

 brown of upperparts and sides of body; this hue extending well on to 

 the underparts between the limbs; limbs, hands, feet and tail chestnut- 

 brown, the last tipped with black; white spot above eye and white 

 stripe from above eye to ear; chin and throat white reaching into the 

 dark ochraceous-buff of the underparts. . 



Measurements. Total length, 598; tail vertebrae, 246; hind foot, 

 59; ear, 23. Skull: Total length, 60; Hensel, 54; zygomatic width, 

 34; interorbital width, 8; palatal length, 24; length of upper tooth- 

 row including canine, 16; length of canine, 9; length of mandible, 35; 

 of lower toothrow including canine, 20. 



Subgenus Lutreola. 



1 Mustela macrodon (Prentiss). 



Lutreola macrodon Prentiss, Proc. U. S. Nat. Mus., XXVI, 1003, 

 p. 887. 



Lutreola vison antiquus Loomis, Am. Journ. Sci., XXXI, 1911, p. 

 228. 



Type locality. Shellheaps at Brooklin, Hancock, Maine. 



Measurements. Skull: Fragment only obtained, consisting of 

 superior maxillae; portion of nasals, right zygoma, and palate extend- 

 ing but 6 mm. behind molars. Incisor row, 8.25; length of premolars, 

 18.25; width of palate between canines, 9; width of palate between 

 molars, 12.50; from middle of incisor row to inner tubercle of molar, 

 30; space between an torbital foramina, 22; width of narial opening, 

 9.25; width of an torbital foramen, 6X4; length of incisor row to tip 

 of nasals, 14.25. Type in United States National Museum. 



Mustela vison vulgivaga Bangs. 



Mustela (Lutreola) vulgivaga Bangs, Proc. Bost. Soc. Nat. Hist., 



XXVI, 1895, p. 539- 

 Type locality. Burbridge, Plaquemines Parish, Louisiana. 



Mustela vison nesolestes (Heller). 



Lutreola vison nesolestes Heller, Univ. Calif. Pub. Zool., V, 1909, 



P- 259. 

 Type locality. Windfall Harbor, Admiralty Island, Alaska. 



1 According to Hardy (Forest and Stream, 61, 1903, p. 125) this animal became 

 extinct about 1860. 



