M A< ROPID.K. — I'KTAl'Itrs. 1 lit 



Pam. 4. MACROPID.E. 



ACROBATA. 



Teeth : — Incisors S ; Canines ^ ; Premolars ^ ; Molars ^| ; = 30. 



The Oposscji Mouse. Acrohata pygniaea. 



Owen, Odont. pi. 100. fig. 5 (lower jaw), text p. 380. — Waterhouse, 

 Nat. Hist. Mamm. i. pi. 19. fig. 5 (skull). 



Cervical vertebrae 7 



Dorsal 14 



Lumbar 5 



Sacral 2 



Caudal 29 



*a. Skull. New Holland. Prom Mr. Gould's Collcctiou. 

 6, c. Skulls. Prom the Zoological Society's Collection. 

 d. Skeleton : male. Prom Mr. Stevens's Collection. 



PETAURUS. 



Teeth: — Incisors ^; Canines ^7; Premolars |j|; Molars ^ ; = 40. 



The Sugar Squirrel. Petaurus sciureus. 



Cervical vertebra? 7 



Dorsal 14 



Lumbar o 



Sacral 2 



Caudal 17 



a. Skeleton. New Zealand. Presented by Captain P. P. King. 



b. Skeleton (imperfect). From the Zoological Society's Collection. 



The Short-headed Petaurus. Petaurus brevicep3. 



Waterhouse, Trans. Zool. Soc. ii. p. 404 pi. 3 (base of skull). 



Cervical vertebra? 7 



Dorsal 13 



Lumbar 6 



Sacral 3 



Caudal 19 (imperfect). 



a. Skull. Australia. 



f>. Skeleton. Australia. Prom Mr. Prince's Collection. 



The Ariel. Petaurus ariel. 

 *a. Skull. Port Essington. Presented by Capt. W. Chambers, P..N . 



