786 
Genus.—Erina&ceus. 
3—3 44 3—3 up 
Teeth.—I. 33 13h oy M. Per 36. 
Head.—Muzzle rather elongated. 
Limbs.—Feet with five toes. 
Body.—Thickly covered with sharp quills or spines above, 
and with quills and hair below; capable of contraction into 
a ball. 
Tail.—Short. 
Habitat.—Enurope, Asia, and Africa. 
Genus.—Centétes. 
2-2 , 1—l1 3—3 33 ‘ 
Teeth.—I. - =, C 12 M. =o38. § - 
ee I 323 at 3-3" 33 ome 
times I. = Canines large, round, and conical, separated 
from other teeth by vacant space. 
Head.—Muzzle elongated—Ears short and rounded. 
Body.—Covered on upper surface with mixed spines and 
bristles. 
Tail—None. 
Habitat.—Madagascar, 
Family.—MAcrorips, 
Sub-family.—Phalangistina. 
Skin of flanks developed into a parachute-like expansion, 
and affixed to the fore and hinder limbs. Hind feet with 
five toes, the thumb opposable to the others, and without a 
claw, the two next joined together as far as the claws. 
Genus.—Acrobates. 
Testh I. 2=s,.0, =) Bo Me a 
0 Sh 8} 3—3 
true molars nes each with four acute cusps, premolars 
large and sharp pointed. 
Hairs of tail stiff, and set in double row like the barbs of 
a feather. 
The 
Genus.—Petaurus. 
Teeth,— = 40, 
Tail hairy, but not prehensile, and extremely long. 
Genus.—Petaurista. 
Teeth.—_Space between the molars and incisors oceupied 
=f 
= ”. The four last 
are true molars, and are furnished each with four pyramid- 
by two rudimentary minute teeth. M. 
ical cusps, except the last tooth in the upper jaw, which | 
only bears three cusps. 
Genus.—Cuscus. 
Teeth, as in Phalangista. 
Tail.—Prehensile, destitute of hair except at the base, and 
covered with small tubercles. 
Genus.—Phalangista. 
Teeth.—Variable, incisors always j oa = and true molars 
6—6 
Molars, either ——, , —— te 
= 6—6’ 7=7 8—8 
canines very small, and close to the incisors, 
Tail.—Prehensile, and coloured with hair except at tip, and 
a naked stripe along the under side of the extremity. 
Ears.—Elongated and triangular. 
Inferior 
always = 
4 
COMPENDIUM OF GENERIC DISTINCTIONS. 
Genus.—Phascolaretos. 
4—4 
“£4 
crown of each true molar furnished with four angular 
pyramidical tubercles. 
Toes of fore-feet in two sets, the one comprising the two 
inner, and the other the three outer toes. 
Tail.—None. 
= 30. The 
Teeth.—I. °—,c, pv 
I=) 0—0 1—1 
Sub-family.—Macropina, 
Hinder feet much longer than those of fore-limbs, fie 
nished with four toes, the two inner toes being small, and 
connected together as far as the small claws. 
Teeth.—Six incisors above, two below, lying nearly 
horizontally in the jaw, and projecting. Canines either 
wanting, or only in upper jaw, very close to the incisors. A 
| considerable space between the canines and molars, which 
5 
are a The front molar has its crown narrow and com- 
= 
pressed, but the others are furnished with two transverse 
tubercles. 
Tail—Long, covered with hair, but cannot be curled or 
twisted. 
Genus.—Dendrélogus. 
123 i Mo 
1 a ; 
two middle incisors zs he jaw a ar larger than the 
lateral. 
Feet.—Hinder feet scarcely longer than fore-feet—Claws 
of fore-feet very strong, curved, and compressed—Fore- 
feet themselves larger than ordinary. 
Tail—Longer than body, powerful, and covered with 
hair. 
Teeth. eC: = P. : as _ 98 The 
Genus.—M4cropus. 
Teeth—Same as in preceding genus, but the two middle 
incisors of the upper jaw are equal in length to the other. 
The outermost on each side being broad. 
Feet.—Hind-feet much longer than fore-feet—Claws, only 
of fore-feet, strong, curved, and compressed. 
Tail.—Powerful, covered with hair, not so long as body. 
Genus.—Halmatirus. 
Teeth—Two middle incisors of upper jaw longer than the 
lateral. 
Head.—Rather elongated. Muzzle, naked. 
Feet.—Hinder far surpassing the fore-feet—Claws of fore- 
feet, flattish and strong. 
Tail.—Shorter than the body, and covered with scales 
towards the tip. 
Genus.—Petrégale. 
Teeth.—Canines wanting ; upper incisors equal, but the 
front rather the longest, and slightly curved inwards ; hinder 
one hatchet-shaped, dilated towards the edge, and neried 
in the centre. 
Head.—Muzzle bald. 
T'ail.—Cylindrical, furnished with a well-marked tuft 
at tip. 
Genus.—Bettongia, 
Teeth.—Canines placed near the incisors, the space being 
about equal to one of the incisor teeth. Foremost com- 
pressed molar furnished with many vertical grooves ; true 
molars nearly square. 
Head.— Short and broad. 
