266 Mr. J. E, Gray on new Mammalia. 



equal folds on each side, the hinder tooth being the narrowest ; the 

 first upper grinder has three equal alternating folds ; the second has 

 three on the outer and two on the inner side, and the hinder one is 

 elongate, narrow, with three slight folds on each side, and an oblong 

 elongated lobe behind. 



Hitherto no true species of Arvicola has been described as inha- 

 biting Southern Asia or South America. 



Arvicola Americana. Fur soft, brown, rather paler beneath ; tail 

 about two-thirds the length of the body ; the front cutting teeth yel- 

 low, with a slight groove on the outer edge. 



Hab. South America. Brit. Mus. : three specimens- , « ( 



This species is exactly like the English water-rat in appearance, 

 but about half the size, and the skull is small in proportion. The 

 cutting teeth of the A. amphibia are usually smooth, but I have one 

 with the teeth grooved as in these specimens. 



Fam. Leporid,e. 



Lagomys rufescens. Fur rather long, pale gray, with a bright ru- 

 fous tinge, brighter on the head ; base of the hairs dark lead-colour ; 

 slightly varied with black on the hinder part of the back ; side of the 

 face, middle of the throat, abdomen, inner sides of limbs and feet 

 whitish ; ears large, hairy, rounded ; whiskers black, some white at 

 the tip ; claws black. 



Hab. India, Cabul, Rocky Hills near Baker Tomb, at about 

 6000 or 8000 feet elevation. Very quick and wary. 



This is easily known from all the other Old World species by its 

 pale colour and rufous tinge. 



Fam. Aspalacid^e. 



Rhizomys minor. Fur gray, with browner ends, long, very silky ; 

 whiskers brown ; sides of head rather browner ; tail naked. Length, 

 body and head, 6 \ inches ; tail, If. 



Hab. India or Cochin China? 



Gerbillus erythroura. Fur gray-brown, rather grisled, under fur 

 lead-coloured ; chin and throat pure white ; the abdomen and inner 

 side of the limbs whitish ; tail covered with rather rigid pale chestnut- 

 brown hairs, those near the end black-tipped ; whiskers black and 

 white ; the upper cutting teeth pale yellow, with a deep central 

 groove in front ; soles of the hind feet flattened ; hinder half naked, 

 with a band of hair behind the toes ; the toes hairy on the edge. 

 Length, body and head, 5" 3'" ; tail, 4" 3'" ; hind foot and toes, 1" 3'". 



Hab. India, Afghanistan. 



Fam. BovidjE. 



Cephalophora coronata. Pale brown, with a narrow naked streak 

 on the cheek ; inner side of the fore legs and thighs, chin and be- 

 neath white ; end of tail blackish ; crown and tuft of hair between 

 the horns bright reddish brown. 



Hab. Western Africa, Mr. Whitfield. In the menagerie of the 

 Earl of Derby. 



