20 



VULTURIDiE. 



38. Gyps fulvus. 41. Gypaetus barbatus. 



39. Otogyps auiicularis. 42. Gyparchus papa. 



40. Vultui- monacbus. 43. Saicoihamphus gryphus. 



V. MAMMALS. 



MONOTREMATA. 



1. The loMest in organization among the Mammalia aie 

 the MoNOTREMATA, which have frequently been repre- 

 sented in the collection by the Echidna, and of which, 

 through Dr. Bennett of Sydney, there is now a prospect 

 of the Society's possessing the only other form, namely, 

 the Australian Ornithoi-hynchus. 



2. The Marsupialia have always occupied the atten- 

 tion of the Society, altiiough the nature of the soil in the 

 Regent^s Park is extremely unfavourable to the Kangaroos 

 which inhabit the dry plains and mountains of Australia. 

 The rarest form of this class which appears in the Cata- 

 logue is undoubtedly the Thylacine, of which three living 

 specimens only have reached Europe. The great Red 

 Kangaroo {Osphranter rvfus) is also unique in the Society's 

 collection. 



The species are as follows : — 



1. Phascolomys ursinus. /• Halniaturus ruficoUis. 



2. Macropiis major. 8. Hypsiprymnus murinus. 

 3, melanops. 9. Bettongia cuniciilus. 



4. Osphranter rufus. 10. Plialaiigista vulpina. 



5. Halmaturus beunetti. 11. Thylacinus cynocephalus. 



6. thetidis. 



3. The RoDENTiA, including the Rats, Mice, and many 

 other small forms, are so numerous an Order, that the 

 known species actually amount in number to one-third of 

 the whole Mammalian Class. 



It is therefore neither desirable nor possible that any 

 representation of the variations of form in so immense a 

 group beyond that of the most striking and important 

 genera should be attempted. 



The Beavers, the Cavies, and Porcupines, the 

 Hares, and the Squirrels, appear to be a sufficient 

 limit, and of these the Society counts on an average about 

 the following number of species : — 



