2 CHIEOPTEEA. 



horned ; and the smooth cerebral hemispheres do not 

 extend backwards over the cerebellum. 



The dental series consists of four kinds of teeth — 

 incisors, canines, premolars, and molars; and the 

 dental formula never exceeds, 



Inc.J,c.g,pm.|El,m.g,= 38teeth. 



Suborder I. MEGACHIROPTERA. 



Crowns of the molar teeth Bmooth, marked with a longitudinal 

 furrow ; bony palate continued behind the last molar, narrowing 

 slowly backwards ; second finger* generally terminating in a claw ; 

 sides of the car- conch forming a complete ring at the base ; pyloric 

 extremity of the stomach elongated. 



Prugivorous. 



Limited to the tropical and subtropical regions of the eastern 

 hemisphere. 



Suborder II. IMICROCHIROPTERA. 



Crowns of the molar teeth acutely tubercular, marked by trans- 

 verse furrows ; bony palate ]iarrowing abruptly, not continued 

 laterally behind the last molar ; second finger not terminated by a 

 claw ; outer and inner sides of the ear-conch commencing anteriorly 

 from separate points of origin ; stomach simple, or with the cardiac 

 extremity more or less elongated. 



Carnivorous, feeding principally upon insects ; rarely frugivorous. 



Inhabiting the tropical and temperate regions of both hemi- 

 spheres. 



* In accordance with the custom of the older zoologists and anatomists the 

 writer has, hitherto, in his published papers, used the term " thumb " to indi- 

 cate the first finger, denominating the succeeding fingers as "first," "second," 

 "third," and " fourth " respectively. This custom he now abandons, adopting 

 instead the terminology of most modern writers on zoology and anatomy, in 

 which the thumb is counted as the first finger, as it has the advantage, not only 

 of being more generally used, but also of being absolutely required when treat- 

 ing of the homologies of the limbs. 



