2r>2 ^Ir. O. Thomas 07i ncio Mammuh from 



A full list of the iiianiinals will in duo course appear in 

 *N<iva Guinea,' but in the meantime it seems advisable to 

 publish preliminary diagnoses of the new forms. 



13y the generosity of the authorities at Biiitenzorg, the 

 types of the new species are presented to the British Museum. 



]Syctimene celceno, sp. n. 



A large species related to JS\ aello, with similar broad 

 dorsal band, but rather smaller, and of browner coloration. 

 Forearm 83 mm. iSkuU, greatest length 36*5. 

 JIab. North New Guinea. 

 Type. Adult male. B.M. no. 22. 2. 2. 2. 



Rattiis mordax traniitius, subsp. n. 



Like true 77iordad', but colour blackish grey, without fulvous 

 suffusion. 



Head and body 175 mm. ; tail 170 ; hind foot 35-5. Skull- 

 length -il-o. 



IJab. Doormanpad-bivak, N. New Guinea {W. C. van 

 Heurti). 



Type. Female. B.M. no. 22. 2. 2. 13. Original num- 

 ber «6. 



Rattus ccenorum, sp. n. 



Like R, mordax, but larger, stouter, with heavier feet and 

 skull. 



Head and body 207 mm.; tail 230 ; hind foot 44. Skull- 

 length 47.. 



Hob. Pionier-bivak, Mamberano River ( W. C. van Ileum). 



Type. ^ld\Q. B.M. no. 22. 2. 2. 19. Original number 2G. 



Rattus handicidus, sj). n. 



A clumsy, heavily built rat, still larger than coenorum. 



Head and body 252 mm. ; tail 220 ; hind foot 49 ; skull- 

 length 54. 



IJab. Pionier-bivak, Mamberano Biver ( W. C. van Ileum). 



Type. Old male. B.M. no. 22. 2. 2. 22. Original num- 

 ber 25. 



