39S Mr. 0. Thomas on some 



Emhallonura mgrescens, Gray, 



c? . 53 ; ? . 52. Gira River ( W. Stalker). 

 The small size of these specimens confirms the recent 

 separation * of E. n. solomonis from the typical form. 



Mus ringens, Peters & Doria. 



c?. 0,5. 



" Native name ' Kura.' ''—C. A. W. M. 



This is the Papuan representative of Mus terrce-regincBf 

 Alst., with which it may have to be united when enough 

 material exists to justify the expression of a definite opinion. 

 Both may be distinguished from their allies by the yellow 

 mottling of the tail. 



^ "* Mus mordax, sp. n. 



? . 16. 14th November, 1903. Type.— BM. no. 4. 8. 3. 1. 



'' Native name ' Kaisi.' "— C. A. TV. M. 



Closely allied to Mus prcetor^ Thos., of which it appears to 

 be the Papuan representative. Fur coarse, harsh, and spinous, 

 with many longer bristles intermixed. General colour above 

 of the same coarsely grizzled bistre-brown as in prcetor, 

 becoming rather more tawny on the rump. Under surface 

 soiled clay-colour, the bases of the hairs dull slaty. Ears 

 short, unitormly dark brown. Upper surface of hands and 

 feet brown. Tail coarsely scaled, 9-10 scales to the cm.; 

 dark brown throughout ; its numerous hairs rather over one 

 scale in length. Mammge 2 — 2 = 8. 



Skull broad, rounded, smoother and less heavily ridged 

 than in prcetor ; supraorbital edges square, faintly beaded, 

 the beading forming a distinct postorbital projection. In 

 prcetor the supraorbital ridges are evenly divergent, without 

 postorbital projections, and are more strongly developed on 

 the parietals. Palatal foramina parallel-sided, not or scarcely 

 more widely open in the middle than at the posterior end, 

 reaching back to the level of the front edge of m^. In prcetor 

 the foramina are widely open at their middle, narrowmg to 

 sharp points behind as well as in front. Incisors unusually 

 broad, smooth, and rounded in front^ not specially deep antero- 

 posteriorly. Below the}' are equally thick and their roots are 

 carried up nearer to the corouoid notch than is the case in 

 M. jyrcetor. 



Dimensions of the type : — 



Head and body 190 mm. ; tail 136 ; hind foot (s. u.) 32. 



* Ann. & Mag. N. H. (7) xiv. p. 200 (1904). 



