666 CHIROPTERA 



deposits being an allied extinct genus. A number of European 

 Miocene species have been referred to F'espertilio, but the term in 

 these cases must be used in a somewhat wide sense. Vespertiliavus, 

 of the Phosphorites of Central France, differs from FespertUio in the 

 proportions of its premolars. 



Section EMBALLONURINA. 



Tail perforating the interfemoral membrane and appearing on 

 its upper surface, or produced considerably beyond the truncated 

 membrane ; the middle pair of upper incisors generally large and 

 close together. 



Family EMBALLONURID^E. 



First phalanx of the middle finger folded (in repose) on the 

 dorsal surface of the metacarpal bone (except in Noctilio and 

 Mystacops). Nostrils opening by simple circular or valvular aper- 

 tures at the extremity of the muzzle, not surrounded or margined 

 by foliaceous cutaneous appendages ; tragus distinct. 



The Emballonmidce are generally easily distinguished by the 

 peculiar form of the muzzle, which is obliquely truncated, the 

 nostrils projecting more or less in front beyond the lower lip ; by 

 the first phalanx of the middle finger being folded in repose 

 forwards on the upper surface of the metacarpal bone ; by the tail, 

 which either perforates the interfemoral membrane or is produced 

 far beyond it; and by the upper incisors, which are generally a 

 single pair separated from the canine and also in the middle line. 

 The family is cosmopolitan like the Vespertilionidce, but rarely 

 extends north or south of the thirtieth parallel of latitude. 



Subfamily Emballonurinae. Tail slender, perforating the inter- 

 femoral membrane, and appearing upon its upper surface, or 

 terminating in it ; legs long, fibula very slender ; upper incisors 

 weak. 



In the Furipterine division the tail terminates in the interfemoral 

 membrane ; the crown of the head is greatly elevated above the 

 face-line ; the thumb and first phalanx of the middle finger are very 

 short ; and the dentition is i f , c $, p f , m f ; total 38. 



Represented by two genera, Furipterus l and Amorphochilus? each 

 including one species of peculiar aspect; the latter distinguished 

 from the former by the widely separated nostrils and the great 

 extension backwards of the bony palate. Habitat South America. 



In the typical or Emballonurine division part of the tail is 

 included in the basal half of the interfemoral membrane, the remain- 



1 Bonaparte, Faun. Ital. vol. i. (1832-41) : Syn. Furia, F. Cuvier, Mim. du 

 Mustum, vol. xvi. p. 150 (1828). Preoccupied by Linn. 1766. 



2 Peters, Monatsber. Ak. Berlin, 1877, p. 185. 



