;86 



COMPENDIUM OF GENERIC DISTINCTIONS. 



Head. Muzzle elongated, and blunt at extremity 

 Ear round and naked. 



Limbs. Feet with five toes, three central toes 

 largest. 



Body. Long bristles scattered among the fur. 



Tail. Rather long, scantily haired, and scaly. 



Habitat. Malacca and Sumatra. 



Genus. Krinaceus. 

 3-3 44 33 



Teeth.-I. , P. , M. = 36. 



33 22 33 

 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. Europe, Asia, and Africa. 



Genus. Centetes. 

 2 2 i i 3 3 3 3 



Teeth. I. , C. , P. , M. = 38. 



33 11 33 33 



Sometimes I. 



33 

 33 



Canines large, round, and coni- 



cal, 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. MACROPID^E. 

 Sub-family. Phalangistina. 



Skin of flanks developed into a parachute-like ex- 

 pansion, 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. 



Teeth. I. 



33 



C. 



i i 



P. 



33 



33 

 M. = 36. 



33 



i i i i 3 3 



The true molars furnished 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. 



Genus. Petaurus. 



33 i i 33 44 

 Teeth. I. , C. , P. , M. = 40. 



i i i i 33 44 

 Tail hairy, but not prehensile, and extremely long. 



Genus. Petaurista. 



Teeth. Space between the molars and incisors 



66 

 occupied by two rudimentary minute teeth, M. . 



55 



The four last are true molars, and are furnished eacn 

 with four pyramidical cusps, except the last tooth in 

 the upper jaw, which only bears three cusps. 



Genus. C uscus. 

 Teeth, as in Phalangista. 



Tail. Prehensile, destitute of hair except at the 

 base, and covered with small tubercles. 



Genus. Phalangista. 



33 

 Teeth. Variable, incisors always , and true 



x i 



44 66 77 



molars always . Molars, either , , or 



44 66 77 



J tj 



. Inferior canines very small, and close to the 



88 

 incisors. 



Tail. Prehensile, and colored with hair except at 

 tip, and a naked stripe along the under side of the 

 extremity. 



Ears. Elongated and triangular. 



Genus. Ph ascolarctos. 



Teeth. I. 



33 



C. 



i i 



P. 



i i 



M. 



44 



30- 



i i o o i i 4 4 

 The 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. 



Sub-family. Macroplna. 



Hinder-feet much longer than those of fore-limbs, 

 furnished 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. Ca- 

 nines either wanting, or only in upper jaw, very 

 close to the incisors. A considerable space between 



r_r 



the canines and molars, which are . The front 



55 



molar has its crown narrow and compressed, but the 

 others are furnished with two transverse tubercles. 

 Tail. Long, covered with hair, but cannot be 

 curled or twisted. 



Teeth. I. 



Genus. Dendrologus. 

 33 oo i i 



C. 



P. 



M. 



44 



= 28. 



i i o o i i 4 4 

 The two middle incisors of upper jaw hardly larger 

 than the lateral. 



Feet. Hinder-feet scarcely longer than fore-feet 

 Claws of fore-feet very strong, curved, and com- 

 pressed Fore-feet themselves larger than ordinary. 



Tail. Longer than body, powerful, and covered 

 with hair. 



Genus. Macropus. 



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 com- 

 pressed. 



Tail. Powerful, covered with hair, not so long as 

 body. 



Genus. Halmatiirus. 



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. Petrogale. 



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 notched in the centre. 



Head. Muzzle bald. 



