1. DIDELPHTS. 361 



eaudata. EhinariTim naked, projecting backwards in the centre on 

 the top of the muzzle. Ears very small and rounded, laid forward 

 they reach only about halfway towards the eye ; their internal 

 basal projection and metatragus both weU developed. Centre of face, 

 crown, nape, and whole of the centre of the back uniform finely 

 grizzled oUve-grey. Cheeks, a narrow ring round eye, sides of neck, 

 shoulders, flanks, hips, and base of tail bright rufous. Chia clear 

 reddish ; chest and belly with the hairs basaUy grey, terminally red. 

 Mammae (PI. XXYIII. fig. 6) exceedingly numerous, the two lateral 

 series sometimes running the whole way from just behind the 

 axillse backwards nearly to the vulva, and the median set consisting 

 of five, arranged as shown in the Plate, the formula varying from 

 6-5-6=17 to 11-5-11=27*. Whole of arms and legs, aU round, 

 bright red ; hands and feet pale brown. Hind pads (PI. XXVIII. 

 fig. 5) small, rounded, and prominent, the two parts of the hallucal 

 pad widely separated. Tail about equal in length to head and body, 

 its base alone furry, the remainder scaly, nearly naked ; a few fine 

 thinly scattered hairs only present, brown above, red below. 



STcull (PI. XXVII. fig. 7) short and stoutly buUt. Interorbital 

 space evenly rounded ; no postorbital processes or temporal ridges. 



Teeth narrow and delicate. Upper premolars markedly increas- 

 ing backwards, p.^ rather disproportionally smaller than p.* Length 

 of the three anterior upper molars about 4"3 millim. Lower p.* 

 rather longer than p.' Lower molar series about 6 miilim. in 

 length. 



Dimensions. 



d. 2- 



(t). a (in spirit). 



— Adult, 



millini. millim. 



Head and body 108 106 



Tail 55 62 



Lower leg 22 



Hind foot 15-5 



Muzzle to eye 13 



Ear , . 5-3 



Skull, see p. 367. 



Sab. Entre Eios and Eio Grande do Sul. 

 Type in collection. 



This species is no doubt that referred to, but not named, by 

 Hensel in his paper on the Mammals of South Brazil J. 



* The type has 11 on one side and 9 on the other, i. e. 11-5-9 = 25. Speci- 

 men i is in too bad a condition for the exact number to be made out. On the 

 other hand, a specimen of this species from Entre Eios, preserved in the Genoa 

 Museum, and kindly lent to me by the Marquis Gr. Doria, has only 6-5-6=17 ; 

 ■ thus showing that while the outer series are variable in number, the middle set 

 are fairly constant. 



t Prom Hensel, loo. infrU cit. 



X Abb. At. Berl. 1872, p, 128. 



