6 CLASS MAMMALIA. 



Roussettes with a small tail: four incisors in each jaw. 



These comprehend all the species described for the 

 first time by M. Geoffroy. One of them, woolly and 

 grey, (Pier, fflgyptiacus,) lives in Egypt in the cata- 

 combs, vaults, fyc. Another of a reddish hue, with 

 a tail somewhat longer, and to a certain extent in- 

 volved in the membrane, (Pter. Amplexica?idus,J 

 Geoff. Ann. Mus, t. XV. pi. i\\, comes from the 

 Archipelago of the East Indies, §-c. To these may 

 be added, the Pteropus Griseus, Geoff. Ann. Mus. 

 torn. XV. pi. vi. ; Pteropus Stramineus, Seb. I« LVII. 

 I, 2, ; Pteropus Marginalus, Geoff, loc. cit. pi. v.; 

 Pteropus Minimus, id. 



3. Following the relations pointed out by M. Geof- 

 froy, we shall moreover separate from the Roussettes 

 the Cephalotes, which have cheek-teeth of the same 

 character, but in which the index or fore-finger, 

 though short and furnished like the preceding spe- 

 cies with three phalanges, is, however, without a 

 nail. The membranes of their wings, instead of 

 being joined to the flanks, are both of them united 

 together on the middle of the back, to which they 

 adhere through the medium of a vertical and longi- 

 tudinal partition. Very frequently they have but 

 two incisors. 



The Cephalotes of Peron, (Cephalotes Peronii, Geoff.) 

 Geoff. Ann. Mus. XV. pi. iv. 



Brown or red. Habitat, Timor. 

 When the Roussettes have been thus detached, 



