452 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxviii. 



worn to furnish characters flistinouishing- them from those of Mus., 

 (»xce})t th:it the incisors arc rclativeh' much narrower. Pelage long 

 and dense, tiiat of un(ler})arts resem])ling (h't/zonri/s; tail hairy, 

 esy)ecially near the end, where the annuli are concealed; ears moder- 

 ate in size, coated on edge and outer surface with short hair; feet 

 broad, with underside smooth and naked, with tubercles iJattened, the 

 sixth or postero-external one obsolete. 



LIMNOMYS SIBUANUS, new species. 

 SIBUAN RIVER MARSH-RAT. 



Tij2^e. - AdxxM female (skin and skull), Cat. No. 125228, U.S.N.M. 

 Collected on Mount Apo at 6,600 feet altitude, southern Mindanao, 

 Philippine Islands, June 30, 1904, by Edgar A. Mearns. (Original 

 number, 5688.) 



CJiaracters. — Those of the gemis. Tail concolor, with annuli six- 

 teen to the centimeter at middle, and extreme base smooth and naked 

 })elow; whiskers long, extending to the shoulders; belly so densely 

 furred that the manuna' can not be detected; longest hairs of rump, 

 35 nmi. in length. 



Color. — General color of upperparts raw umber, washed with tawny- 

 olive on sides, darkest on middle area of upperparts, where the most 

 l)lack hairs are intermixed; entire underparts, except tail, cream-buff, 

 washed with clay color on chest and around vent; tail grayish brown; 

 up})er surface of feet ))roadly banded with seal brown, with toes and 

 sides of feet brownish white; nail-tufts grayish white; claws flesh 

 color tipped with horn color; ears dark drab, with pale yellowish 

 tufts of fur at anterior ))ase; muzzle grayish drab; whiskers mixed 

 black and white; pelage of upperparts gray (No. 6 Ridgway) at base, 

 of underparts cream-bufl' to the base. 



Reinarl'. — The unicpie type was trapped on a wet, mossy growth of 

 vegetation, on the left l)ankof a little stream which in its lower course 

 becomes the Sibuan River, flowing from Mount Apo. In spite of 

 persistent efl'orts we failed to procure other specimens. 



Cranial measurements of the l!lj>e, an adult femah', from Mount Aj>o, Miiidiniao. 



Measurement. 



Basilar length ( Hensel ) 



Occiiiito-nasal lengtli 



Interparietal breadth {l)et\veen outer edj^e of ni)per parietal margins) . 



Lengtii of internasal suture 



Greatest breadth of rostrum 



Length of upper toothrow 



No.125228, 



U.S.N. M., 



type. 



mm. 

 26 

 32 



14.5 

 12 



5.5 



5 



