1904,] NATURAL SCIENCES OF PHILADELPHIA. 187 



scapular region with burnt-umber, a slight silvering of pale hairs scat- 

 tered irregularh' ; beneath uniform fawn color. Brown phase: above 

 sepia, around the head and neck paler as there the ecru under color is 

 very apparent; below pale Isabella color, the hair seal-brown basally. 

 Membranes ranging from vandyke-brown to almost pure black in color. 



Skull. — Rather fragile in character; elongate, zygomata not mark- 

 edly expanded ; brain-case considerably elevated above the moderately 

 depressed rostrum; foramen magnum placed slightly above the basi- 

 cranial axis. Brain-case subglobose, crests but slightly marked; audi- 

 tory bullae considerably inflated, of medium size. Rostrum rather 

 low, of moderate length, evenly expanded; nasal depression consid- 

 erably excavated and visibly compressed; palate subequal in wddth, 

 moderately excavated, posterior projection extending but little 

 beyond the major portion, the cleft narrowly rounded; pterygoids 

 rather strongly divergent. Mandible with the ramus rather strong, 

 ascending ramus low and comparatively weak; condyle small; coro- 

 noid process very weak and not elevated above the condyle ; angle of 

 the mandible strongly developed and directed laterally, forming a pro- 

 nounced subfalciform process. Skulls of females are considerably 

 smaller, and have the rostral portion much more buUate than in the 

 males, in this respect approaching the race inflata, from wMch they 

 can, however, be separated by the slenderer skull and narrow palate. 



Teeth. — Central pair of upper incisors much larger than the lateral 

 pair, broad, cutting edge bilobate; lateral incisors with a single acute 

 posteriorly placed cusp; upper canines conoid, very slightly diverging; 

 first upper premolar subreniform in basal outline, the posterior portion 

 lying against the internal border of the second premolar smaller than 

 the anterior portion ; second upper premolar with a large hastate pos- 

 terior cusp, basal outline subpentagonous ; first and second upper molars 

 subquadrate, protocone and hypocone developed as low pointed cusps; 

 third upper molar strongly transverse, protocone developed as a jagged 

 elevation, para-hypoconoid ridge N-shaped. Lower incisors crowded, 

 equal in size, trilobate; canines slender; first lower premolar uni- 

 cuspidate, the labial face considerably excavated; second lower pre- 

 molar very minute and crowded between the first and third and dis- 

 placed toward the lingual face; third lower premolar unicuspidate, 

 slightly more acute than the first premolar; molars equal in size. 



Measurements. — Average of series f Total length [5] 61 mm. (59-65) ; 



^ Numbers in brackets designate the number of specimens examined for that 

 particular measurement. This is necessitated by the condition of material, as 

 some alcohohc specimens are shriveled to sucli an extent that but few measure- 

 ments can be taken. Figures in parentheses have their usual significance as 

 extremes. 



