154 MAMMALIA. 
ATHERURUS, CuY. 
Where neither the head nor muzzle is inflated, and in which we 
observe a long non-prehensile tail; the toes are like those of the true 
Porcupines. 
Hyst. fasciculata, L.; Buff. VII, 77; Schreb. 170. (a) (The 
Pencil-tailed Pere apine) The upper part of the spines on the 
back grooved, and the tail terminated by a bundle of flattened 
horny slips, constricted from space to space. 
Eretison, F. Cuy. 
The Ursons have a flat cranium; the muzzle short, and not con- 
vex ; the tail of a middle size, and the spines short, and half hidden 
in the hair. One species only is known, the 
Hystrix dorsata, L.3 Buff. XII, lv. (The Urson.) From 
North America.(2) 
SYNETHERES, F. Cuv. 
The muzzle short and thick; the head vaulted in front, and the 
spines short; the tail long, naked at the extremity, and prehensile, 
like that of an Opossum or Sapajou. There are only four toes, all 
armed with claws ; they climb trees. 
Hyst. prehensilis, L.; Cuendu, Marcg., Hoitztlaquatzin, Hew. 
nand.(3) (The Prehensile-tailed Porcupine.) Hair of a brown- 
ish-black ; spines black and white. 
Hystrix insidiosa, Lichtenst.; the Couwiy of Azzaras Pr. 
Max. Brazil. Smaller; the spines partly red or. yellow, and 
hidden during a part of the year under its long greyish-brown 
hair. 
gs 
Lerpus, Lin. 
Hares have a very distinctive character in their superior incisors, 
which are double, that is, each of them has a smaller one behind 
-- 
(1) This figure, copied from Seba, I, 52, i, istoo short. That of Buff. is better, 
but the slips at the end of the tail are not represented with sufficient distinct- 
ness. We can conjecture no reason by which De Blainville and Desmarets refer 
this species to the genus of Rats; it has the teeth, and other characters of the 
Porcupines, external as well as internal. 
(2) The pretended Coendow of Buffon is also an Urson, but a disfigured specimen 
that had lost itshaif. See Buff. XU, 54. eg ml 
(3) This word, in the Mexican language, means Spiny Opossum. It is the i long 
tailed Coendou of Buff. Supp. VU, 78; but the muzzle in the figure is too short. © 
The figure of Hernandez ¢onveys a much better ‘idea of the animal. 
