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KX Mustela xanthogenys. (Yellow-cheeked Weasel.) B.M. 



Brown ; tip of tail black ; spot before the ears, chest, and be- 

 neath yelloM' ; a small spot under each eye and the chin white ; feet 

 white. 



'Miislela xanthogeuys, Gra'i, Ann. Sf Mag. N. H. 1843, p. 118; 



Zool. Vol/. Sulphur, t. 9; P. Z. S. I860, p. llo. 

 Putoriiis xanthogenys, Baird, Mamm. N. A. p. 176. 



Hah. California. 



Veiy like M. brasiliensis ; but the head is coloured like the back, 

 and the spot before the ears is yellow. There is a very small white 

 spot over the orbit on one side. 



M. de BlaiiiviUe (Osteographie) figures the upper jaw of a Mus- 

 tehi under the name of M. patagonica, with small teeth and a very 

 short brim-like transverse tubercular grinder, that is quite unknown 

 to me, and very unlike M. Humholdtii, figured on the same plate. 



4. VISON. 



Body elongate, slender. Limbs stout ; feet rather hairy ; pads 

 bald, exposed ; space between them bald. Tail moderate, shorter 

 than the body, hairy. SkuU elongate, depressed. Teeth 34; false 

 grinders ^ ; the upper tuberculated grinder rather large, inner lobe 

 with one tubercle, outer edge with three. 



Foetoiius, Keys. 4'- Bias. p. 21. 

 Mustela, § Lutreola, Schinz, Si/n. Mamm. i. p. 346. 

 ISlustfla, § Putorius, Xilsson, Skand. Faun. p. 152. 

 Putorius (sp. ), Baird. * 



Yisou, 6'/-«y, P. Z. S. I860, p. 115. 



Body nearlj' as stout as that of an Otter. Very destructive in 

 farmyards. The pads of all the toes are naked, not overgrowni 

 with hair ; the soles with four pads placed at the base of the digits, 

 the largest at the line of junction between the third and fourth 

 digits, and well furred between the pads {Baird, p. 178). Feet in 

 summer more nuked than in winter. 



a. The upper tubercular grinder large, the inner half much larger and longer 

 than the outer one ; upper lip brown. American Vison. 



1. Vison lutreocephala. (American Yison.) B.M. 



Brown ; lower lip and chin more or less white. 



Mustela lutreola, Foster, I'hil. Trans. Ixii. p. -371. 



Mustela vison, Briss. ; Blainv. (htcogr. Mustela, t. 13 (teeth). 



Mustela (Putorius) vison, liichardson, Fauna B.-A. p. 48. 



Mustela (Martes) vison, Dism. Manim. i. p. 183, 1820. 



Mustela lutreocephala, Harlan, Fauna Amer. p. 03. 



Mustela vison, var. americana, Schinz, Syn. Mamm. p. 347. 



Mustela canadensis, Er.il. Syst. i. p. 447. 



Miistela canadensis, /3. vison, Bodd. Blench. Anim. p. 186. 



