GG MAMMALIA. 



III. According to the characters of M. GeofFroy, we further separate 

 from the Roussettes tlie Cephalotes which have the same kind of 

 grinders, but whose index finger, short, and consisting of three phalanges, 

 like that of the preceding, wants, however, the nail. The membranes 

 of their wings, instead of meeting at the flank, are joined to each other 

 on the middle of the back, to which they adhere by a vertical and longi- 

 tudinal partition. Very often they have but two incisors. 



C. Peronii, GeofF. ; Ann. du Mus. XV. pi. 4. (The Cephalote 

 of Peron). Brown or red. From Timor. 



The Roussettes being withdrawn, we have the true Bats left, which 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 finger never has a nail, and, one subgenus ex- 

 cepted, the membrane is always extended between the two legs. 



They should be divided into two principal tribes. The first has three 

 ossified phalanges in the middle finger of the wing, but the remainder, in- 

 cluding the index itself, consists of but two. 



To this tribe, which is almost exclusively foreign, belong the following 

 subgenera. 



MoLossus, Geoff. — Dysopes, Elkj. 



Has the muzzle simple ; ears large and short, arising near the angle of 

 the lips, and uniting with each other on the muzzle ; the tragus short, 

 and not enveloped by the conch {a). The tail occupies the whole length 

 of their inter-femoral membrane, and, more frequently, even extends 

 beyond it. They have almost always two incisors in each jaw, though, 

 according to M. Temminck, several of them have at first six below, of 

 which four are successively lost. 



The DiNOPS of M. Savi belong to the Molossus with six inferior in- 

 cisors. There is one species in Italy — Dinops cestonii, Savi, Giorn. de 

 Letter., No. 21, p. 230. 



M. Geoffrey calls those in which he has counted four inferior incisors 

 Nyctinomus*. 



The Molossi, at first, were only found in America f; at present, how- 



* The Nyctinome of Egypt, Geoff, Eg. Mammif., pi. 11, f. 2, and Temm., Monog. 

 des Mammif. pi. 19; — the Nycihiome oi Brazil, Isid. Geoff., Ann. des Sc. Nat., I. 

 pi. 22, or Mol. nasutus, Spix, pi. 35, f. 7; — the N. slender tenuis, (Horsfield, Java, N. 

 No. 5), and Temm. Monog. pi. 19, bis. 



f Buffon has three of them confounded by Gmel., under the common name of 

 Vespertilio molossus; M. longicaudatus, Buff. X. xix, 2; — M. fusciventer, lb. 1; — M. 

 guyanensis, Id. Supp. VII. Ixxv. Since then they have been increased. M. rufus, 

 Geoff., Ann. Mus. VI. 155 ; — M. alecto, Temm., Monog., pi. xx; — M. abrasus, Temm., 

 lb., pi. xxi; — M.velox, Natterer, Temm., pi. xxii, 1; — M. obscurus, Geoff., Temm., 

 lb., pi. xxii, 2. These species, however, have not been sufficiently compared with 

 those of Buffon, nor with the M. ursinus, Spix, pi. xxxv, f. 4, and the M. fumarius, 

 lb., f. 5 and 6. 



^ (a) The conch is a deep conical cavity, situated within the eminences of the 

 outer part of the ear; it is bounded above by a prominent curved margin, wliich is 

 called the antihelix; and the conch leads to the canal, through which the sound 

 passes into the interior of the ear. — Eng. Ed. 



