1890.] 71 [Allen. 



The back of the trunk measures 35 mm. across, and is covered with 

 dark-brown hair with ashy tips. It becomes more woolly and brown at 

 the rump. Hair of the same texture extends a little beyond the knees on 

 the dorsal surface of the posterior extremities, but is entirely absent from 

 the front. With the exception of a few hairs on the flexor surface of the 

 forearm near the elbow the membranes are naked. Ears a little longer 

 than the muzzle, naked (save a few hairs at the base), ovate, nowhere 

 emarginate. 



Palatal ruga? between the molars but four in number. 



Skull.— Ecto-pterygoid process with trenchant laminated pedicle which 

 reaches to the anterior margin of the undivided foramen ovale. Post- 

 glenoid process in height equals one-third the anterior and posterior 

 measurement of the glenoid cavity ; zygomatic arch curved above the 

 level of the optic foramen. * The sagittal crest elevated, entire. An 

 orbito-froutal foramen lies behind the postorbital process. Frontal bone 

 with scarcely any inflation at the inner border of the orbit and on the 

 vertex. 



The maxilla as it lies in the orbit is marked by a tuberosity placed to 

 the median side of the groove which leads to the infraorbital canal. The 

 median border of condyloid process is flat, thin, not robust. 



Teeth. — Maxillary incisors not touching ; they possess well-defined pos- 

 terior cingules. The incisorial series but slightly arched. The lateral 

 incisors larger than the centrals and grooved anteriorly. The first pre- 

 molar in contact with the second. The second premolar with a well- 

 defined palatal cusp. The second molar one-third the length of the first 

 which lies in line with the infraorbital canal and not under the root of the 

 zygomatic process. 



The mandibular incisors scarcely separated. The lateral incisors larger 

 than the central but moderately raised above their level. The first pre- 

 molar larger than the maxillary or mandibular last molar. It almost 

 occupies the interval between the canine and the second premolar. The 

 second premolar with conspicuous lingual cusp. 



The maxillary canine on the right side with a rudiment of a postero- 

 lateral cuspule. The maxillary second premolar shows a similar rudiment 

 on the external cusp much the same as in P. keraudrenii. The teeth of 

 the left side of the maxilla and those of the mandible are without these 

 rudiments. No antero-basal projection present on the maxillary third 

 premolar. • 



This species is most closely allied to P. phceoceplialus. Like it it belongs 

 to the same group of the genus with P. keraudrenii and P. molossinus. 

 The latter species I have not seen. P. keraudrenii is a larger species and 

 quite differently colored. P. molossinus agrees closely in size, but differs 

 in distribution and color of the fur. The other species which resemble 

 it in size are P. rubricollis, P. temminckii, and P. personatus. 



* By this expression is meant that when the skull is viewed in profile the zygomatic 

 process lies above the plane of the optic foramen. 



