202 PROCEEDINGS OF THE ACADEMY OF [Feb., 



Skull. — Rather strongly built; moderately elongate, zygomata but 

 little expanded; brain-case moderately elevated above the short and 

 broad rostrum. Brain-case subglobosc, somewhat depressed, crests 

 faint. Rostrum of medimii height, comparatively short and distinctly 

 expanded, considerably less than the brain-case in length; nasal de- 

 pression distinctly though shallowly excavated; palate subequal in 

 width, moderately excavated, posterior projection extending but little 

 beyond the major portion, the cleft narrowly rounded; pterygoids 

 considerably divergent. Mandible with the ascending rami low and 

 quite weak, the angle being considerably elevated and moderately 

 produced laterally. 



Teeth. — Median upper incisors moderately large, shallowly bilobate. 

 the external lolje considerably smaller than the internal; external 

 upper incisors over half the size of the median pair in basal outline, 

 the cusp very low and weak, no space present between the incisors and 

 canines; upper canines very slightly divergent and moderately re- 

 curved; first upper premolar reniform in basal outline, the greatest 

 length of the tooth oblique, cusp low and simple ; second upper pre- 

 molar crudely triangular in basal outline, the apex anterior, cusp 

 caniniform; first and second upper molars with the protocone and hypo- 

 cone distinct and acute. Lower median incisors trilobate; lower 

 lateral incisors bilobate, not half the size of the median pair and 

 crowded between them and the canines; lower canines considerably 

 divergent, slightly recurved ; first lower premolar subquadrate in basal 

 outline, cusp moderately elevated, compressed; second lower pre- 

 molar low, circular and strongly crowded between the first and third 

 premolar; third lower premolar oblong in basal outline, the single 

 cusp acute; third low^er molar smaller than the two preceding teeth 

 and the entoconid and hypoconid somewhat weaker when compared 

 with the para-proto-metaconid group. 



Measurements. — ^Averages of series: Length of head and body [3] 

 67.5 mm. (62.5-72) ; total length [4] 89 (80-95) ; length of head [3] 25.3 

 (24-26.1) ; ear [3] 2L5 (21-22) ; tragus [3] 5.7 (5.5-6) ; forearm [4] 60.6 

 (59-63); thumb [3] 10.7 (10.3-11.5); third digit [3] 96.6 (92-101): 

 tibia [4] 22.1 (22-22.5); foot [3] 14.5 (14-15); tail [3] 24.9 (23-26). 



Total length of skull [averages from two skulls] 22.7 mm. (22.5-23); 

 greatest zygomatic width 12.9 (12.5-13.3) ; breadth of brain-case above 

 roots of zygomata 11.2 (11-11.5); interorbital width 5; height at base 

 of second premolar 5.4 (5.3-5.5); height of brain-case 8.5; width of 

 palatal constriction 1.8 (1.7-2); length of palate from anterior fora- 

 mina 9.7 (9.6-9.8); width of palate including teeth 8; greatest length 

 of mandible 17.8. 



