15G PROCEEDINGS OF THE ACADEMY OF [March, 



pale, dull buff, the two colors nearly equally mixed on back, but 

 the buff in excess on sides, where, however, it is clouded by the 

 appearance at surface of the gray (very nearly Eidgway's No. 6) 

 of the under fur. The longer hairs show a distinct bluish metallic 

 lustre. Under parts and inner surface of legs buff to base of 

 hairs. Head similar to back, but grizzle much less coarse, and 

 cheeks washed with buff. Lips and chin whitish. Feet dull 

 dark brown. Ears and tail dark brown. 



Fur and Other External Characters. — As in Mus integer. 



Skull and Teeth. — The skull and teeth closely resemble those of 

 Mus integer, except that the interpterygoid space is wider and the 

 first upper molar somewhat larger. 



Measurements. — External measurements of type : Total length, 

 500; head and body, 245; tail, 255; hind fool, 50 (48.6); ear 

 from meatus, 24; width of ear, 18. 



Cranial measurements of type : Greatest length, 53 ; basal 

 length, 46; basilar length, 43; length of nasals, 21.4; diastema, 

 15; zygomatic breadth, 27; mandible, 32.4; maxillary toothrow 

 (alveoli), 9.4; mandibular toothrow (alveoli), 10. 



Specimens Examined. — Seven (one skull without skin, and one 

 entire animal in alcohol), all from Linga Island. 



Remarks. — Two specimens of 3£us firmus have been compared 

 with the type of 3fu$ mulleri by Dr. F. A. Jentink, of the Leyden 

 Museum. They prove to represent a larger animal with more 

 black on the back, and differing also in certain cranial peculiari- 

 ties, which, however, Dr. Jentink does not specify. 



Viverra tangalunga Gray. 



An adult female Avas trapped on Linga Island by Malays, 

 August 27, 1001. The uterus contained three embryos. 

 Arctogalidia simplex sp. nov. 



Ti/pe.—Xdnh male (skin and skull). No. 113,069 United States 

 National Museum. Collected on Linga Island, South China Sea, 

 August 30, 1901, by Dr. W. L. Abbott. Original number 1,254. 



Characters. — Size and general appearance as in Arctogalidia 

 inornata, of Bunguran Island, North Natunas, but color distinctly 

 darker and median dorsal line plainly visible. 



Color. — Back, sides and outer surface of legs a rather dark, 

 finely grizzled, silvery-gray, the elements of which are as follows : 



