466 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. XXVI. 



Measurements of Mus catellifer. 



Locality. 



Number. 



Pulo Mansalar 



Do 



Do 



Do 



Do 



Do 



Do 



Do 



Do 



Do 



Do 



Do 



114588 

 114.^89 

 114590 

 114593 

 114596 

 114612 

 114591 

 114592 

 114594 

 114.595 

 114611 

 114613 



Sex. 



Total 

 length. 



Female adult. 



do 



....do 



do 



do 



do 



Male adult . . . 

 Male young . . 

 Male adult . . . 

 Male young . . 



do 



do 



vim. 



('322 

 376 

 348 

 366 

 333 

 383 

 338 

 297 

 398 

 333 

 328 

 309 



Head 

 and 

 body. 



mm. 

 220 

 208 

 202 

 222 

 177 

 219 

 183 

 1.57 

 221 

 186 

 179 

 176 



Tail. 



mm. 



«102 

 168 

 146 

 144 

 1.56 

 164 

 1.55 

 140 

 177 

 i47 

 149 

 133 



Hind 

 foot. 



Hind 

 foot 



with- 

 out 



claws. 



a Type. 



l> Tail damaged. 



LENOTHRIX, new genus. 



Type: Lenothrix canus, new species. 

 Chrrracfers.—Yoi'm as in the larger species of 3fus; tail longer than 

 head and body. Fur densel}^ woolly, interspersed with long, straight 

 hairs. Feet as in Mus, but plantar tubercles unusually large. Gen- 

 eral form of skull as in Mm, but supraorbital ridges greatly developed, 

 somewhat as in Tijlomys. Teeth essentially as in Ltmomys," but width 

 of upper molars only about half that of palate, and supplemental reen- 

 trant angles on inner side of these teeth less strongly developed. 



LENOTHRIX CANUS, new species. 

 (Plate XVIII.) 



Tijj)e.—Adn\t male (skin and skull). Cat. No. 11-1386, U.S.N.M. 

 Collected on Pulo Tuangku, January 27, 1902, by Dr. W. L. Abbotti 



Characters.— A slender, l^luish gray rat. In external appearance 

 similar to Lenomys meyeri as figured by Meyer,* but considerably 

 smaller (head and body 236 instead of 290; hind foot 12 instead of 16), 

 and with tail longer than head and body. 



Far. — The fur is composed of three elements: (1), a fine, dense, 

 woolly underfur, the hairs of which at middle of back are about 

 12 mm, in length; (2), slender, straight, terete hairs, the length oi 

 which in same region averages about 25 mm., and (3), weak, flattened 

 hairs intermediate in length between the two other kinds and most 

 a})undant on sides and underparts. The flattened hairs are very incon-ji 

 spicuous and might readily pass unnoticed. It is the abundant woollj' 

 underfur that determines the character of the pelage and gives the 

 animal a very difl^erent appearance from Mns ferreocanus, which it 



«As figured by Thomas, Trans. Zool. Soc. London, XIV, pi. xxxvi, fig. 1. 

 '''Abhandl. u. Berichte des k. Zool. u. Anthrop.-Ethn. Museums zu Dresden, VII, 

 1899, pi. VIII. 



