164 PROCEEDINGS OF THE ACADEMY OF [Marcll, 



beyond the tail. Fur loug, soft and silky, the posterior part of 

 the ueck with a collar of longer hair; throat and chin with short 

 floccose fur; ectopatagium considerably furred; forearm not 

 furred ; upper lip heavily haired. 



Cofor.— General tint above and below orange-rufous, slightly 

 darker over the shouldei*s, palest around the head and on the 

 throat. ^^ Membranes pale chestnut. 



Skull. — Rather light and fragile; cranial portion abruptly ele- 

 vated and thrown forward ; foramen magnum very large and wholly 

 above the level of the orbital region. Brain-case comparatively 

 large, and forming a right angle with the line of the face ; auditory 

 bullre moderately prominent, projecting under the glenoid fossae, the 

 latter being large and subquadrate. Rostrum low, the upper surface 

 deeply channeled centrally; palate considerably excavated, pos- 

 terior projection narrow, the cleft acute-angulate with narrowly 

 rounded apex ; zygoma slightly projecting, sublamellate. Man- 

 dible rather long, thin, moderately deep ; condyle greatly elevated ; 

 coronoid process low. 



Teeth. — Central pair of upper incisors much longer than the 

 small lateral pair, flat, the cutting edge bilobate; upper canines 

 loug and falciform, the tips slightly spread ; first upper premolar 

 with the basal outline of the tooth crudely rhomboid ; second upper 

 premolar with a large caniniform, posteriorly placed cusp; upper 

 molars broad, the first and second with W-shaped arrangement of 

 the ridges, the protocone being more strongly developed on the first 

 than on the second molar ; third molar transverse, with N-shaped 

 fold ( para-hypoconoid) and a marked protocone. Lower mcisors 

 equal in size, trilobate ; canines moderately long, the bulk of the 

 tooth being anterior ; premolai's with the same general unicuspidate 

 form, the cusp of tlie first being placed anterior to the centre of the 



" The color is best seen by examining the specimen while immersed 

 in alcohol, the wet specimen taken from the preservative appearing 

 much darker. ;Mr. Osborn {Proc. Zool. Soc. London, 1865, p. 73) de- 

 scribes the fur of a freshly killed specimen as being bright chestnut, 

 above rather paler. The same writer (p. 73) observes that the tint varies 

 from a sandy bulf to deep reddish-brown. It is possible from this that 

 two marked phases exist. Since writing the above I have been enabled 

 to examine a skin from the collection of the United States National 

 ]\Iuscum. My notes on it are as follows : General color a rufous-orange 

 lint, suft'used above with smoky brown, this tint restricted to the tips of 

 the hair, and strongest on the lateral portions of the back and rump ; 

 long hair on the interscapular region naturally parted showing a i)atch 

 of the lighter general color. Membranes browuish-black. 



