142 ON MAMMALS FROM THE PHILIPPINE ISLANDS. [Feb. 5, 



the A. caliginosus group, oi' pei-liaps more of a member of the 

 subgenus Melanomys. 



Size rather larger than in C.fallax of Luzon. Fur close and 

 fine, but i-ather stiff owing to the admixture of a number of fine 

 flattened spines ; hairs of back about 6-7 mm. in length. General 

 colour above blackish brown, neai'est to bistre of Ridgway 

 but darker; the under surface nearly as dark as the upper, 

 without any line of demarcation. Individually the hairs of the 

 back are dull slaty basally, with buffy tips ; the spines slaty with 

 black tips. Ears very short, closely haired, brown. Whole of 

 limbs, including hands and feet, blackish brown. Tail short, very 

 finely scaled (scales about 18 to the centimetre), finely haired, the 

 hairs about 1 1 scales long ; uniformly blackish thi'oughout. 



Skull less flattened than that of G. fallax, but this may be due 

 to youth. The brain-case long, comparatively parallel-sided, in 

 continuation of the broad interorbital region. Supraorbital edges 

 with scarcely a trace of beading. Outer plate of zygoma-root cut 

 back just as in C.fallax. Palatal foramina short, nai-row in front, 

 broadened behind, not parallel-sided as iw fallax. 



Molars rather like those of a very simple type of Mus, without 

 any supernumerary lateral cusps. M^ and M^ each with a small 

 median posterior cusp as in C.fallax. 



Dimensions of the type, which is barely adult : — 



Head and body 98 mm. ; tail 68 ; hind foot (s.u.) 25 ; ear 13. 



'^\x\\\ — greatest length 28 mm. ; basilar length 22 ; zygomatic 

 breadth 14; length of nasals 9*2; interorbital breadth 5*6; 

 breadth of brain-case 12-3; palatilar length 11; diastema 7 ; 

 palatal foramina 3-8 x 2-2 ; length of tipper molar series 4*1. 



Hah. and Type as above. 



The characters of this remarkable species are a great puzzle, 

 and only add to the difficulty of assigning a proper position to 

 the type of the genus, Crunomys fallax. The single specimen of 

 the latter is very old, and in the worn-down state of the teeth it 

 was not clear whether they were or were not of hydromyine 

 structure. The teeth of the present animal are certainly not 

 typically hydromyine, but rather murine, while at the same time 

 it is possible that in wearing down they might acquire the slight 

 resemblance to hydromyine teeth shown by C.fallax. This being 

 the case, I have decided to describe the species, though with doubt, 

 as a Cnmoviys, but until younger specimens of C. fallax, or older 

 ones of the present form, are available for examination, it would 

 be advisable not to express any definite opinions as to the 

 systematic position of either. As a species C. melanias is at once 

 distinguishable by its blackish colour and heavier feet. 



7. Sus sp. 



4 skulls. Mount Apo, Mindanao. 



