158 MAMMALIA. 
The only species known is also from Brazil, somewhat sur- 
passes the Guinea-Pig in size, and is of an olive-grey. 
Cutoromys, Fr. Cuv.—Dasyprocra, Mig. 
The Agoutis have four toes before and three behind ; four grinders 
throughout, almost equal, with flat crowns irregularly furrowed, 
rounded borders notched on the internal edge in the upper jaw, and 
on the external one in the lower. In disposition, and in the nature 
of their flesh, they resemble Hares and Rabbits, which they may be 
said to replace in the Antilles and hot parts of America. 
C. acuti; Cavia acuti, L.; Buff. VIII, 1,1. (The Common 
Agouti.) The tail reduced to a simple tubercle ; fur brown. 
The male fawn coloured on the croup; as large as a Hare. 
& C. acuchi; Cavia acuchi, Gm.; Buff. Supp. II, xxxvi. (The 
Acouchi.) Six or seven vertebre in the tail; brown above, 
fawn coloured beneath ; size of a Hare. 
C. patagonicus; Cavia patagonica, Penn. and Schreb. 3 the 
Pampas Hare of the Creoles of Buenos Ayres. This animal 
appears to be a species of Agouti, with longer ears, and a 
very short naked tail ; but its molars are not known. 
* Ca ocenys, Fr. Cuy.(1) 
The Pacas, in addition to teeth very like those of the Agoutis, have 
avery small toe on the internal edge of the fore foot, and one on each 
* side, equally small.on their hinder one, making five toes every where. 
Besides this, there is a cavity formed in their cheek which dips un- 
der the border formed by a very large and projecting zygomatic 
. arch,(2) which eves a very extraordinary aspect to the bony head. 
Their flesh is said to be very good. 
There is one species or variety fawn coloured, and another 
brown » both of which are spotted with white, the Cavia paca, 
oL.; Buff. =: xliiil ; Supp. III, xxxy. 
F indie there remains an anima! perhaps nearly allied to the 
Cavias, and possibly more so to the Lagomys or the Rats; which 
we are unable to dispose of, on account of our ignorance of its teeth : 
I mean the Chinchilla, thousands of whose skins are to be had, but 
of which we have never yet been able to procure the entire body. It. 
isa A a ae | ace. ; , 
(1) Anema, without strength ; Chloromys, yellow rat ;) Dasyprocta, hairy but-_ 
tock ; Celogenys, hollow cheek ; Hydrocherus, w ater-pig. 
(2) Dr Harlan (Faun. Americ., p. 126) has made a new genus from a head pre- . 
served in the Philadelphia Museum, which he names Osteopera; but from the de- 
scription, it appears to us to be nothing more than that of the Paca. Desmarets 
has already made the same observation. 
