Mammals from South America. 153 



without projecting plate, very much as in 0. dryas. Palatal 

 foramina narrow, equally contracted posteriorly and anteriorly. 



Dimensions of the type (an adult female, measured in 

 skin) : — 



Head and body 118 millim. ; tail 148; hind foot s. u. 

 (wet) 23; ear (wet) 16. 



Skull: back of interparietal to tip of nasals 27; greatest 

 breadth 14*6; nasals 8*8x3; interorbital breadth 3"5 ; 

 palatal foramina 5*1 x 1*9 ; upper molar series 4' 7. 



Hub. Pita R., above the Chillo Valley, Ecuador. Alt. 

 3500 metres. 



Type B.M. no. 98. 8. 1. 7. Collected May 5, 1898, and 

 presented by Consul L. Soderstrom. 



This species is readily distinguished from 0. niveipes, its 

 only near ally, as also from the externally similar 0. laniger, 

 by its abnormally diminished muzzle, which gives its skull a 

 quite different appearance to that of any known species. 



Lonckeres punctatus, sp. n. 



Size medium. Fur spinous, the spines on the middle of 

 the back about 19 millim. long and 1*3 millim. broad. 

 General colour pale ferruginous, punctulated with white, the 

 head and limbs greyer. The rufous of the back is due to the 

 hairs, which are reddish terminally, with greyer bases. Spine3 

 of back greyish white basally, their tips either all black or 

 black broadly tipped with white, the white-tipped spines 

 being most numerous posteriorly, and prominently contrasting 

 with the general colour. Head, both above and laterally, 

 coarsely mixed black and white. Ears with a few fine 

 blackish hairs on their edges and a small tuft of whitish hairs 

 on the antitragus ; an indistinct patch behind their posterior 

 bases white. Sides coarsely mixed whitish grey. Under 

 surface throughout white, with a slight tinge of buffy, the 

 line of demarcation well marked. Inner side of limbs white, 

 outer grizzled grey ; metacarpals grey ; metatarsals grey ex- 

 ternally, white internally ; digits whitish. Tail of medium 

 length, rather thinly haired, the scales showing through; 

 uniformly brown, scarcely or not lighter below. 



Skull with the nasals just about equalling the premaxillary 

 processes behind ; frontal region flattened, the supraorbital 

 ridges very broadly expanded ; pterygoid processes narrow, 

 not spatulate. 



Dimensions of the type (an adult male, measured by the 

 collector in the flesh) : — 



Head and body 236 millim.; tail 233; hind foot s. u. 34; 

 ear 20. 



Ann. & Mag. N. Hist. Ser. 7. Vol. iii. 11 



