C74 Ml-. 0. Thomas on 



sericeus. Ami in the lower j.iw, both in carmelitir and cocei/gts, 

 there are three small intermediate unicuspids, while there arc 

 only two in tlio three available specimens of sericeus. 



Dimensions of the type (measured on the skin) : — 



Jlead and body 515 mm.; tail 3130; hind foot 51. 



Skull : condylo-basal length 8() ; zygomatic breadth 53*7; 

 nasals, length 33'0, least breadth 8, greatest breadth 14 ; 

 intertemporal breadth 9 ; mastoid breadth 42 ; diagonal 

 diameter of secator 5 ; combined length of ?«s'"^ 1G*5. 



Hub. Saruwaged Mts., alt. 3000 m. 



Ti/pe. Adult male. Original number 20. Collected August 

 1914 by C. Keysser. 



This species is no doubt very nearly allied to Ph. carmelitcB, 

 but its larger size and the development of a dorsal line seem 

 to justify its being given full specific rank, especially as the 

 third chocolate-coloured cuscus, Ph. sericeu.f, proves to differ 

 from both the other species by a permanent difference in the 

 number of intermediate teeth present. This character is 

 usually considered impermanent and untrustworthy, but is 

 here constant through a series of 14 skulls of the three forms. 



12. Pseudochirus corinncB ar(/enteuSj Forst. 



S , R.M. 5. Saruwaged Mts. 



J, K. 15. Eawlinson Mts. 



Not sexed, E. 10. Eawlinson Mts., 1500 m., June 1911. 



The last specimen appears to be the example of " connn^;," 

 which, by its unusually strong coloration, induced Prof. 

 Forster to apply tiie rather unsuitable name of argeiiteiis to a 

 less rufous example. 



South of the present region there seems to be a definable 

 subspecies of this group, which may be called 



Pseudochirus corinnce ccecias, subsp. n. 



•Size rather smaller than in true corinmv, and colour more 

 reddish brown. General colour above, as compared with that 

 of corinnce, more umber-brown, the rump and base of tail 

 near " Brussels-brown " or even ap})roacliiiig " hazel." Face 

 *' huffy brown " instead of " hair-brown." Otherwise the 

 character of the markings, the dorsal black line, and the light 

 ear-patches are all as in true corinnce. 



Skull smaller than in corbintv ; nasals less expanded behind. 



Dimensions of the type (measured on skin) : — 



Head and body 340 mm.; tail 275 ; hind foot 40. 



Skull: greatest length 61; upper length 58; zygomatic 



