MYOPTERIS MAMMALIA. 75 



nose, as in the two preceding genera, but not provided with 

 operculi ; upper lip very thick ; tail composed of six vertebrae, 

 free above the membrane ; interfemoral membrane large. 



T. Senegalensis, Geoff. Desm. Fur brown above ; brown ash-co- 

 loured below ; auricle rounded. Body 2| inches long. Africa. 



T. Mauritianus, Geoff. Desm. Fur chestnut above, reddish below ; 

 auricle terminated by a sinuous border. Body 3 \ inches long ; 

 spread of the wings above nine inches Isle of France. 



T. perforatus, Geoff. Desm. Fur gray red above; ash-coloured 

 below ; auricle dolabriform. Three inches long, spread of the 

 wings nine inches. Inhabits Egypt at Ombos and Thebes, in the 

 tombs of the kings Geoff. Egypt, ii. pi. 3. fig. 1. 

 M. Desmarest is of opinion that this and the T. Senegalensis are the same. 



T. lepturus, Geoff. Desm. (Pespertilio lepturus, Schreb.) Fur gray, 

 paler below than above; auricle very short and obtuse; a fold 

 towards the tail, formed by the membrane of the wings. Body 

 about an inch and a half long. Surinam. Schreb. Saugh. i. pi. 57. 



T. rufus, Harlan. Fur of a reddish cream colour ; membranes of a 

 dusky red. Four inches long ; spread of the wings 12 inches. 

 Inhabits Pennsylvania. Harlan, Faun. Amcric. 23. 



Gen. 42. MYOPTERIS, Geoff. 



Incisors f , canines |-, molars f-, = 26. Inferior incisors 

 bilobed ; nose simple ; forehead flat, without leaves, mem- 

 branes, or furrow ; muzzle short and thick ; ears large, tail 

 long, half enveloped at its base, free at the extremity. 



M. Daubentonii, Geoff. Desm. Upper part of the head and body 

 of a brown colour ; below of a dirty white, with a slight tint of 

 fawn colour. Body three inches in length. Country unknown. 



Gen. 43. CEL^NO, Leach. 



Incisors f , the upper acuminated and simple, the lower formed 

 as it were of four columns ; molars f , the anterior teeth in 

 both jaws acuminated, the three posterior acutely tuberculated. 



C. Brooksiana, Leach. Back ferruginous ; belly and shoulders 

 yellowish ; membrane black ; ears acuminated, distinct. Lin. 

 Trans, xiii. 70. 



Gen. 44. AELLO, Leach. 



Incisors f , molars T 8 I? the two upper acuminated, the third bi- 

 fid, and the fourth with three edges ; in the lower jaw, the 

 three anterior acuminated, the three posterior bifid. 



A. Cuvieri, Leach. Isabella ferruginous yellow ; wings dark brown ; 

 ears short, approximate, broad ; no auricle ; tail not reaching be- 

 yond the membrane Lin. Trans, xiii. 71. 



