740 CLASS XVII. 



2 — 2 

 molars ^ — k > small, with crown compressed, acute. Nose with 

 o — o 



crested membranous folds. Ears moderate, acuminate, furnished 



with tragus. Pollex long, extended in front of alar membrane. 



Tail none. Intercrural membrane small. (Dent. form. Owen, 



.1-1 1-1 2-2 



'' 2^' ^TTl' P- 3-^ = 2^-) 



A genus very distinct from all the rest of the bats by its small molars 

 terminating in a cutting edge, from tropical America. Sp. Desmodus rufus 

 Maxim., Abbild. z. Naturgesch. Bras. Liefer x. ; ejusd. Beitrdge, il. s. 231 

 — 23S, &c. Compare Bdrmeister Syst. Uebers. s. 55 — 57. 



Note. — Genus Diphylla Spix, imperfectly known, allied to Des- 

 modus, is distinguished by the inferior incisors pectinate, somewhat 

 long, the ears lunate, pollex somewhat short, and by the absence of 

 intercrural membrane. Comp. Wagner in Schreber's Sdugth. 

 Supplementhand, i. s. 381 — 383. 



Section II. Frugivorous Bats. 



Molar teeth with crown flat, with middle longitudinal groove. 

 Ears small, destitute of tragus. Index with three phalanges, 

 almost always unguiculate. Tail very short or none. Interfemoral 

 membrane small, deeply excised posteriorly. (Head with face 

 protracted, gape of mouth less than in the preceding.) 



Family XLII. Pterotocyna. (Characters of the section.) 



TKq frugivorous bats are, on the whole, the largest species of this 

 order, and are found in the warm regions of the eastern hemi- 

 sphere only. 



Compare on this division Geoffr. Saint-Hilaire, Ann. du Mus. xv. 

 pp. 86 — 108, PI. 4—8; — IsiD. Geoffr. Saint-Hilaire, article Roussette, 

 Diet, class. d'Hist. nat. xiv. pp. 695 — 708; — Temminck, Monogr. i. pp. 157 

 — 204, 11. pp. 49 — 112. 



Hypoderma IsiD. Geoffr., [Cejphalotes GeOFFR. in part, 



4 2 



Cephalotes Temm.) Incisor teeth in younger j , in adults ^ , in 



aged ^ ; molars g— ^ . Index unarmed. Tail distinct. Membrane 

 of wings produced above the skin of back, continuous. 



