THE FAMILIES AND GENERA OF BATS. 131 



high sagittal crest and broadly expanded, shelf-like paroccipital 

 processes. Zygomata heavy, a little expanded both anteriorly and 

 posteriorly. Basisphenoid pits evident, though rather shallow. Floor 

 of bra incase forming an evident angle with roof of posterior nares. 

 Audital bullae small and flat, covering about one-half surface of 

 cochleae; the height considerably less than width. Ears moderately 

 large, widely separate. Noseleaf well developed, though simple. 

 Tail less than half as long as femur, projecting from base of moder- 

 ately wide interfemoral membrane. 



Species examined.- — Phyllostomus discolor Wagner, P. hastatus 

 (Pallas), P. latifolius Thomas, P. verrucosus Elliot. 



Remarks. — This genus is at once recognizable by the robust, heavy 

 form of its members, most of which are of medium or large size, the 

 simple, well-developed noseleaf, moderately small, separate ears, 

 short tail, heavy skull, and the combination of two lower incisors 

 with two lower premolars. 



Genus PHYLLODERMA Peters. 



1805. Phylloderma Peters, Monatsber. k. preuss. Akad. Wissensch., Berlin, 



p. 513 (subgenus of Phyllostomus). 

 1866. GjiaiuUra Gray, Pi-oc. Zool. Soc. London, p. 114. 

 1878. Phylloderma Dobson, Catal. Chiropt. Brit Mus., p. 482 (genus). 



Type-species. — Phylloderma stenops Peters. 

 Geographic distribution. — Cayenne. 

 Number of forms. — One, the type species. 

 Characters. — Dental formula: 



-2 3. 1. --34567 . 2-2 1-1 2-2 3-3 



12-. 1. -234567*2-2'° l-±'^ m 3-3' m 3- 3 



Teeth much as in Phyllostomus, but differing in several details: 

 Inner upper incisors bifid, the slender outer cusps longer than the 

 inner ; inner lower incisor nearly twice as wide as outer when viewed 

 from the front, faintly bifid, the outer tooth not distinctly so (the 

 same difference in size is noticeable in crown view of these teeth, and 

 both crowns are more drawn out antero-posteriorly than in Phyl- 

 lostomus) ; anterior face of upper canine without longitudinal groove ; 

 crowns of mandibular premolars narrower and more trenchant than 

 in Phyllostomus, and a minute pm 3 wedged transversely between the 

 two functional teeth; mandibular molars narrower than in Phyllos- 

 tomus, with the W pattern somewhat flattened, though perfectly dis- 

 tinct owing to the presence of all the normal elements of the teeth. 

 Skull apparently much like that of Phyllostomus latifolius, but nasals 

 probably rising more abruptly behind nares, and rostrum probably 

 deeper and shorter. Mandible deeper, and symphysis menti longer 

 and more oblique than in Phyllostomus latifolius. External charac- 

 ters essentially as in Phyllostomus. 



