ON THE NEW-GUINEA MAMMALS. 183 



56. Mallomys Rothschildii Thomas. 



The type-specimen, an adult male, is a large stuffed 

 rat in the Tring-Museum ; its skull is in the British 

 Museum. It is a very heavy animal, having head and 

 body 40 cm. and tail 38 cm. (my M. ArmandviUei from 

 Flores has these figures 42 cm. and 35 cm.); it has 

 been captured between Mounts Musgrave and Scratchly, 

 British New-Guinea, The genus Mallomys is allied to 

 Crateromys (from the Philippines) and Lenomys (from 

 Celebes) says Thomas (Novit. Zoolog. 1898, p. 1). 



57. Hyomys Meeki Thomas. 



The type, a female, has been collected by Meek at 

 Avera, Aroa-river, British New-Guinea. Thomas stated that 

 this new genus, Hyomys, is not distinguished by any 

 single character of marked importance, but the gigantic 

 rat upon which it is based cannot be referred to any of 

 the known Papuan genera of Muridae. Head and body 

 measure 39 cm., tail 34.5 cm. (Ann. Mag. N. H. 1903, p. 

 198). Fur harsh, a number of bristles 60 to 70 mm. long; 

 it was no doubt an arboreal animal, as indicated by its 

 shortened hind-feet, and it is probable that the large point- 

 ed scales of its tail served a purpose analogous to that of the 

 caudal "climbing-irons" oi Anomalurus (Thomas^ 1. c, p. 199). 



58. Anisomys imitator Thomas. 



Another new genus of rats with a single species, 

 based upon a male and a female, collected by Meek 

 in British New-Guinea, Avera, Aroa-river. This genus seems 

 to be even less allied to any known one than Hyomys 

 and it cannot be said what are its nearest relations. Size 

 large, form less bulky than in Hyomys; mammae 6; 

 molars small and delicate; the lower incisors nearly 

 resemble in shape those of Dauhentonia ; combined they 

 are of only the same breadth in front as a single upper 



Notes irora tlie Leyden IMuseum, "Vol. XXVIII. 



