MAMMALIA. 
95 
Sub-Division II. — Tail villous. 
Petaurista pigmcea. — The Pigmy Petaurtsta. 
Plate XVII. fig-. 10. 
Fur uniform mouse-gray, somewhat reddish on the back, 
and white underneath. Inhabits New Holland. 
Division III—Incisory teeth the lower ones very long 
and oblique ; canines 
Genus 8. — Potorous. — Desmarest. 
Generic Character. —Incisors canines grinders |-5. 
total 30. The canines are small, the four posterior grinders 
in both jaws having blunted tubercles; head long; muzzle 
acute ; upper lip cleft; ears large ; fore legs short; feet with 
five toes ; claws sharp; hind feet long, with four toes, two of 
which are united and small; tail long, thick ; hair woolly. 
Female with an abdominal pouch. 
Potorous marinus. — The Kangaroo Rat. 
Plate XIX. fig-. 2. 
Fur brownish above, and gray beneath ; ears rather large and 
rounded. Size of a Rabbit. Inhabits New Holland. 
Genus 9.—Kangurus. — Geojfroy. 
Generic Character. —Incisory teeth |, no canine teeth, grin¬ 
ders total 28. The head elongated; ears large and 
pointed ; eyes large ; fore legs very short, with five toes on the 
feet, which have strong claws ; hind legs very strong and long, 
having only four toes, the two inner small and united; the cen¬ 
tral ones very large, long, and strongly clawed; the outer toe 
moderate ; the metatarsus very long and thin ; the soles of the 
feet applied their whole length to the earth; tail long, very 
thick at the base, tapering and very strong, but not prehensile ; 
is used to assist the animal in leaping. Female furnished with 
an abdominal pouch, in which the teats are situated. 
