EURYOTIS UNISULCATUS. — F. Cuvier. 
Mammalia. — Plate XXIII. 
E. supra flavo-rufus, brunneo penicillatus; capitis corporisque lateribus sordido-cinereis, flavo-rufo um- 
bratis j subtus pallide griseo-albus, ochreo tinctus ; auribus magnis, patulis, apicibus semicirculanbus, 
externe et interne flavo-albis, brunneo penicillatis ; villo lanuginoso. 
Longitudo ab apice nasi ad basin cauda; 7 unc. ; caudaj 3 unc. 6 lin. 
Otomys rNisuLCATUS, F. Cuvier. 
Colour. — The prevailing colour of the upper and lateral parts of the head, 
neck, and body, intermediate between sienna-yellow and buff-orange, the 
tint much broken by a number of fine umber-brown strice resembling delicate 
lines formed by a pencil. The lateral parts of the head and body dusky ash 
grey, tinged with the predominant colour of the back ; the under parts, from 
the chin to the vent, together with the upper lip and the extremities pale 
cream-yellow. The ears internally and externally pale sienna-yellow, pen- 
cilled with brown. Tail superiorly dull brownish red, inferiorly dirty rusty 
yellow. Whiskers reddish brown; eyes brownish black; incisors dull orange 
yellow. 
Form, &c. — Head moderately large, sides bulging; muzzle narrow, laterally 
compressed; tip of nose bare; upper lip divided anteriorly. Whiskers long, 
bushy, and slightly rigid; ears large, patulous, semicircular, thin, and with a 
moderate coating of short rigid hair. Body robust ; legs and toes short ; claws 
nearly straight, pointed and freely covered with rigid hair. Tail cylindrical, 
tapered, and thinly coated with short bristly hair, the cuticular scales visible 
in rings. The fur consists of two sorts ; the one — the predominant — slightly 
rigid, particularly on the back ; the other which is scanty, is soft, woolly, and 
scattered among the latter towards the skin. The first is longest and densest 
on the back and sides, and in all situations slightly recumbent. The incisors 
of upper jaw, each with a longitudinal curve anteriorly, near to the outer 
