QUADRUPEDS. 213 



Without tusks in the under jaw. 



a. The great toe capable of acting like a thumb. Two 

 long incisors in the lower, and six in the upper jaw. The 

 rudiments of tusks sometimes visible in the lower jaw. 



131. PETAURUS. Winged. The skin at the sides be- 

 tween the fore and hind legs expanded, fitting for partial 

 flight. Didelphis pelaurus of SHAW. Probably the D. 

 vygmea of the same author may wan-ant the reception of 

 the genus Phalangista of HIGER. 



132. BALANTIA. Without wings. B. lemurina. 



b. Wanting the great toe. 



133. HYPSYPRYMNUS. With a long tail. Incisors in 

 the upper jaw six, in the lower two. H. minor , or Kan- 

 garoo-rat. 



134. KOALA. No tail. Lower jaw with two long inci- 

 sors, the upper with two long and some lateral short ones. 



B. Without tusks. The corpora lutea are glandular ; 

 the uterus has one os tincae, and the penis is entire. 



135. MACROPUS. Kangaroo. Hind-legs remarkably 

 long. The M. major from New Holland, is the only spe- 

 cies whose history is well known. 



MONOTREMATA*. 



Quadrupeds which do not suckle their young. 



The snout is produced and destitute of hair. The toes 



* Mtvot unua and rgripa foramen, a name given'by GEOFFROY, in reference 

 to the union of the openings of the urinary and sexual organs with the 

 anus, to form one aperture. 



