78 MAMMALIA. 



Pter. vulgaris, Geoff.; Buff. X, 14. (The Common Rous- 

 sette.) Brown, face and sides of the back fawn-coloured. From 

 the Isle of France and Bourbon, where it is found on the trees 

 in the forests. Its flesh has been compared to that of the hare 

 and partridge. 



Pter. rubicoUis, Geoff.; Buff. X, 17. (The Red-collared Rous- 

 sette.) Greyish brown, the neck red. From the same islands, 

 where it lives in the hollows of trees and in caverns.(l) 



b. With a small tail and four iyidsors in each jaw. 



M. Geoffroy was the first who described the species of this 

 subdivision. One of them grey and woolly, P/er. a?^2//JiiCM5, is 

 found in the caves of Egypt. A second is reddish, and has a 

 somewhat longer tail, half involved by the membrane Pter. 

 amplexicaudus, Ann. du Mus. tom. XV, pi. 4. From the Indian 

 Archipelago, 8cc.(2) 

 c. According to the indicia of M. Geoffroy, we also separate from 

 the Pteropi the Cephalotes which have the same kind of grinders, 

 but whose index, short, and consisting of three phalanges, like that 

 of the preceding, has no nail. The membranes of their wings, in- 

 stead of meeting at the flank, are joined to each other on the middle 

 of the back, to which they adhere by a vertical and longitudinal par- 

 tition. Very often they have but two incisors. 



C. Peronii, Geoff,; Ann. du Mus., XV, pi. 4. Brown or red. 



From Timor. 



The Pteropi being taken away, we have the true Bats left, which 



are all insectivorous, and have three grinders on each side in each 



jaw, bristled with conical points, that are preceded by a variable 



number of false molars. Their index never has a nail, and, one 



(1) Add Pter. medlus; Pier, phxops; Pter. poliocephalus; Pter. dasymallus; 

 Temm., Mamm. ,pl. 10. Pier. ]}allidus; Pter. Keraudrenius, Quoy and Gaym., 

 Voy, de Freycinet; Pter. griseus, Geoff. Ann. Mus. pi. 3, XV, vi, cop. Temm., 

 pi. 11; Pter. personatus; Pier, melanocephalus, Temm.pl. 12. 



(2) Add Pier, stramineus; Pier, marginaius, Geoff, loc. cit. pi. 5; Pter. 

 minimus, id. or the Kiodote, Fr. Cuv., or tlie Pter. rostratus, Hor.sf. 



M. Isidore Geoffroy Diet. Class. d'Hist. Nat. article Roussette, gives us a 

 monography of this genus, in which he forms the Pter. personatus of Temm., and 

 some neighbouring- species into the subgenus Pachisoma, which has four molars 

 less than the others, and the zygomatic arches more projecting; the Pter. minimus 

 or rostratus into the subgenus Mackoglossa, in which the muzzle is longer and 

 more slender, and where there are spaces between the grinders. Its tongue is 

 thought to be extensible. He, finally, separates the Cephalote of Peron from that 

 of Pallas, and gives to the first the name of Htpodermis, on account of the com- 

 plete dorsal insertion of the membrane of its wings. 



