618 CLASS XVII. 



Desmar., Petaurus australis Shaw, Hepoona Roo White New South Wales, 

 PI. 6 1, p. 288, Gould Mamm. of Austr. 1. PI. 3 ; smaller than the pre- 

 ceding, a dark streak along the back; the ears longer and naked, the 

 under surface yellowish, &c. 



In a very small species the tail is shorter than the body and furnished 

 along the two sides with long transverse hairs. Sp. Phalangista pygmcea, 

 Petaurus pygmceus Desmae., Dldelphis pygmcea Shaw, Scheeb. Sdugeth. 

 Tab. 144 A, GuERiN Icon., Mamm. PI. 21, fig. 3; it keeps in hollow stems 

 of trees. Prom this species the genus Acrohata Desm. (or Acrobates) is 

 formed. With the exception of the parachute, it closely corresponds with 

 Phalangista nana or Dromicia. 



Family V. Peramelma. Incisors, canines and molars; upper 

 middle incisors not larger than the rest. Snout porrect, acumi- 

 nate. Hind feet with second and third toes conjoined as far as 

 the claws, with first (or pollex) mostly imperfect or indistinct. 



n 



Tarsvpes Gervais. Teeth very small, separate ; incisors ^ , 



1-1 



the lower larger, procumbent, canines :j — r , molars inconstant, deci- 

 3—3 1—1 



duous, mostly ^ — o j remote. Snout very long, attenuate. Ears 



rounded, moderate. Feet pentadactylous, posterior somewhat longer, 

 with pollex apart, clawless ; claws flat, except those of the second 

 and third toes of the hind feet acute, suberect. Tail long, with 

 short fur, prehensile. 



Sp. Tarsipes rostratus Geevais in Gueein Magas. de Zool. 1842, Mamm. 

 I*l- 35—37. Wateeh. Mamm. 1. Tab. 11, fig. i, PI. 19, fig. 6 (cranium), 

 Gould Mamm. of Austr. i. PI. i ; in Western Australia; a small insecti- 

 vorous animal living in trees, agreeing in some respects with Phascologale 

 and Myrmecobius, but having the posterior thujnb of the Phalangistce. 

 The teeth are quite abnormal, as they are in the genus Proteles amongst 

 the carnivora; a ccecum is absent. 



5 — 5 



Perameles Geoffe., Thylacis Illig. Incisors ^ — 5 , the upper 



6 — 6 1 — 1 

 and outer on each side separate from the rest ; canines .— — j- , 



1 7-7 • T 3-3 4-4 ., \ 



nioiars =— -- , spurious molars k-— 5 5 true -. —^ , with crown quad- 

 rate, tuberculate. Snout porrect, acuminate. Ears elongate. Fore 

 feet pentadactylous, with outer toe apart, very short; hind feet 

 elongate, with pollex very short, clawless, apart or none. Tail 

 moderate or somewhat short. 



