1904 ] Allen, New South American Mammals* 335 



brown like the flanks, the color of the upper parts encroaching upon 

 the ventral surface and not sharply demarked ; throat with the pelage 

 dingy brown at base and tipped with grayish fulvous, becoming still 

 lighter on the chin; proximal portion of limbs like the adjoining parts 

 of the body; feet and apical part of limbs black; tail conspicuously 

 ringed with black and pale fulvous, about eight black rings and a 

 black tip, the black rings about twice as wide as the light rings. Pelage 

 coarse and harsh not fine and soft as in N. olivaceus meridensis. 



Total length (type), 814 mm.; head and body, 495; tail vertebrae, 

 319; hind foot (in dry skin), 82, with nails, 88; ear (dry), 26. Skull 

 Total length, 121; basal length, 119; basilar length (Hensel), 103 

 zygomatic breadth, 60; interorbital breadth, 25; postorbital breadth, 

 26; mastoid breadth, 42; width of braincase, 43 ; nasals (imperfect 

 in type); incisors to pterygoid process, 81; upper toothrow (c-m^). 

 46.5; middle molar (m 2 ), 7x7; audital bullae, very convex anteriorly, 

 15 x 9. This skull is practically of the same size as female skulls 

 of corresponding age of N. 'nasua' from Chapada, Matto Grosso, 

 Brazil, but the teeth are much larger, m 2 being i mm. larger in both 

 diameters, and the bullae are longer and narrower and more convex 

 anteriorly. 



This form of the N. nasua group appears to be well charac- 

 terized by its gray head and the absence of facial markings, 

 its coarse harsh pelage, general coloration, and heavy denti- 

 tion. Represented by the type, an adult female, and a young 

 but nearly adult male, both taken at Suapure on the same 

 day. They agree very closely in all details of coloration. 



