new South- American Mammah. 149 



fulvous white proximally and black terminally ; the basal 

 part of the hair being hidden in the underfur, the visible 

 portion of tiie hairs may be said to be black with a whitish 

 snbterminal ring. Underfur scanty, dull greyish proximally, 

 dull fulvous terminally. Face clearer grey, very different to 

 the rufous face of the allied species ; muzzle blackish ; narrow 

 ring round eyes rufous brown ; whole of outer surface of ears 

 and a triangular patch behind their posterior bases bright 

 rufous. Upper lip white, clouded with brown opposite the 

 roots of the whiskers ; a narrow line of rufous edging its 

 junction with the grey of the face. Tip of chin white; inter- 

 ramia more or less darkened, but not, as in the allied species, 

 broadly black to the level of the angles of the mouth. 

 Centre line of throat dull white, terminated by a grizzled 

 grey band across the chest. Belly fulvous white ; the hairs 

 pale fulvous to their bases, gradually becoming white mesially 

 and in the inguinal region. Fore limbs grizzled grey proxi- 

 mally in front, fulvous terminally and on their inner surfaces. 

 Hind limbs nearly all fulvous, darker behind and on the soles, 

 lighter above and in front; no blackish marking above the 

 heels. Tail slender, coarse-haired, coloured like the back, but 

 more heavily blackened ; gland-patch and terminal tuft fairly 

 well marked, but not so conspicuous as in griseus and gracilis. 

 Skull practically identical with that of the Ohilla, but 

 perhaps slightly smaller on the average, and with rather lower 

 bulUe. In the dentition the carnassial, both above and below, 

 is slightly smaller and the grinding-teeth larger than in the 

 allied forms. 



Dimensions of the type (a male, measured in the flesh by 

 collector) : — 



Head and body 580 millim. ; tail 300 ; hind foot (s. u.) 120 ; 

 ear 60. 



Shalls. 

 No. 464. 455. 456. 448. 460. 500. 

 6, 6, 6, d (type), 2- $• 

 aged, adult, adult, yg. adult. 



Extreme length 123 120 118 ' 114 113 107 



Basal length 114 111 109 .. .. 99 



Greatest breadth 68 61-5 61 59 57 67 



Length of nasals 38 88 38 36 35 34 



Interorbital breadth 24 21-5 20 20-5 20 22 



Intertemporal breadth 24 22 21 24-5 23 25 



Breadth of brain-case 44 41-5 41-5 41 39 41 



Palate length from henselion. . 60 58 57 57 55 53 



Teeth :— 



Uppercarnassial, outer length. 10-6 lO'l 9-8 10-4 10 10 



Combined length of m.i and m." 13 4 13 13 13-3 13-1 12-5 



Greatest diameter of m.i .. 10-6 11 10-5 lO'S 



Lower carnassial, length 11-6 12 11-7 12-5 117 11-5 



M., and w-a combined 10-8 9-4 10 lO'l 105 



