1904.] NATURAL SCIENCES OF PHILADELPHIA. 445 



Membranes and Fur. — Membranes thick and leathery ; propatagium 

 •broad. Fur long, silky above, woolly below; skin of the head at the 

 -base of the ears and the interorbital region bare; base of ears and 

 greater part of the internal margin of the ear clothed with long hair; 

 muzzle with a number of long setiform hairs. 



Color. — ^Above mars brown, the hair grayish white basally; below 

 •ecru drab, the hair unicolor; flight membranes clove brown; ears and 

 nasal appendages Front's brown ; auricular hairs the color of the upper 

 •surface. 



Skull. — Light and rather fragile ; brain-case strongly elevated above 

 the rostrum. Brain-case when viewed from the posterior aspect sub- 

 tectate, evenly arched longitudinally; sagittal crest distinct; zygo- 

 mata rather evenly arched, but greatest width posterior; interorbital 

 region broad, depressed, curving evenly toward the rostrum and the 

 brain-case. Rostrum moderately produced, rather low, width at 

 canines considerably less than the interorbital width; palate rather 

 narrow, shallowly excavated, posterior extension rather broad with 

 the cleft acute-angulate with the apex blunt; pterygoids strongly 

 •divergent. Mandible rather long; ascending ramus low; coronoid 

 process blunt; condylar process broad transversely; angles blunt, 

 -divergent. 



Teeth. — Median pair of upper incisors narrow, cutting edges entire; 

 lateral upper incisors very small, low and without a distinct cusp or 

 •other structure; upper canines rather heavy, slightly divergent; first 

 upper premolar subelliptical in basal outline with a distinct median 

 •constriction, cusp rectangulate and low; second upper premolar 

 crudely pyramidical in basal outline, the internal posterior margin bear- 

 ing a distinct rounded shoulder; molars of the type usual in the genus. 

 Lower incisors narrow, compressed; lower canines rather heavy, diver- 

 gent, projecting slightly forward; lower premolars subquadrate in 

 basal outline, the first and third more longitudinal than the second, 

 <iusp of the first tooth rectangulate, of the second and third acute; first 

 lower molar with the para-proto-metaconid gi'oup much less sharply 

 defined than in the other lower molars ; third lower molar with the 

 liypo-entoconid group reduced as in the other members of the genus. 



Measurements.^ — Total length 79.3 mm. (Gaumer) ; head and body 

 46; ear 17.2; greatest width of ear 13; tragus 7; forearm 35.5; thumb 

 10; third digit 65.5; tibia 14.9; calcaneum 9; foot 10.5; tail 28 (Gau- 

 mer); nose-leaf and nose-pad, 7.2. 



Skull: Greatest zygomatic width 9.2 mm.; interorbital width 4.2; 



^ From dried skin, unless otherwise credited. 



