384 



MR. R. COLLETT ON NEW 



[May 20, 



crests are flattened behind \ and converge towards the occipital 

 bone. The nasal bones converge to a common truncated point in 

 the frontals. 



Fig. 3. 



Phalangista kerberiensis, 5 . 

 Skull, viewed from the top. 



Teeth. — Upper jaw. The incisors are three, closely set ; the first 

 is large (length from the maxilla 5 milhin.), but is only half the 

 length of the first lower incisor ; the second and third are small. 

 The canine is separated by a considerable space from the incisors 

 and the first premolar : it is small (of the same size as the second 

 and third incisors). The first premolar small, not larger than the 

 canine; second premolar larger, with 1-2 cusps; third still larger, 

 but not reaching the size of the molars, dilated behind, and with 

 2-3 cusps. The four molars are large. 



Lower jaw. The first incisor is very large, its length from the 

 mandible 10 millim., directed horizontally; the second incisor is 

 rudimentary, hardly projecting above the gnm, and only visible in 

 the sliull. The canine is as rudimentary as the second incisor, and 

 in both skulls only visible on one side. Tlie single premolar situated 

 close to the molars, and of nearly the same size, but wanting the 

 central groove. The molars four ; their series perfectly straight. 



Dental formula: — m. |, p. |, c. j, i. |5|, c. \, p. \, m. |=38. 



^ In the female ; the skull of the male is immature. 



