382 



MR. R. COLLETT ON NEW 



[May 20, 



Ph. albertisii. Length of the skull 65 millim., the greatest breadth 

 39 millim. 



Fig. I. 



Phalangista archer i J ■ 

 Skull, view as seen from above. 



Teeth much like those of Ph. albertisii. Iu the upper jaw the 

 incisors are 3 in number ; the first long, canine-like, its lengtli from 

 the maxillary 5 millim. ; the second short, compressed, with flat- 

 tened crown, more like a small premolar ; the third very small, shorter 

 than the canine (in Ph. albertisii the canine is the longer of the 

 two). The canine is small, pointed. The first premolar small (very 

 much like the third incisor) ; the second somewhat larger, with two 

 cusps ; the third still larger, and with two large and two small cusps. 

 The four molars large. 



In the lower jaw the incisor is very large, directed almost hori- 

 zontally, its length from the mandible 8 millim. The next tooth is 

 very small, close to the root of the incisors, and may be regarded as 

 the second incisor. The single premolar large, but not broad, with 

 three cusps. Then follow the four molars, much like those in the 

 upper jaw. 



In the upper jaw the canines and the first premolar are separated 

 from the other teeth by a short distance ; in the lower jaw all the 

 teeth are closely set. 



Dental formula:— m. \, p. % c. \, i. f=J c. \, p. \, m. J=36. 



