Sjieci'es q/ LcnothrixyVc^n tJie Lin Kin Islands. 89 



that the distance across the postorhital processes is 20'3 mm., 

 as a,i;aiiist WV'S mm. in Mr. Miller's li^^ure. Anterior zygo- 

 matic root nillicr more projectetl forward. Palatal foramina 

 longer. A small intermediate rid<^e present on the side ot" 

 the brain-case between the main parietal ridge and that 

 iunnin<i; back from the hinder edge of the squamosal. 



Teeth agreeing very closely in structure with those of 

 L. cana, but tlie minute anterior median cusp on nii is not 

 ])resent, while there is a minute suj)plcmentary cusp at the 

 outer end of the second as well as of the first interlaminar 

 space in the same tooth. But these small supplementary 

 cusps are very variable in other groups, and are evidently of 

 only specific imj)ortance. 



Approximate dimensions of tlie type (taken on a remade 

 native-prepared skin) : — 



Head and body 2d0 ram. ; tail 246 (perhaps imperfect at 

 tip) ; hind foot (moistened) (s. u.) 49 ; ear (moistened) 2o. 



JSkull : back of interparietal to front of nasals 51 ; greatest 

 breadth 25; nasals 18 X 5*7; interorbital breadth 9*8; 

 breadth across postorbital processes 20*3 ; breadth across 

 parietal ridges at centre 19*7 ; zygoma-root 5*4 ; diastema 15; 

 palatal foramina 9 8xo'7; length of upper molar series 

 (crowns) 10. 



JJab. Oshima, northern group of Liu Kiu Islands. 



Ti/pe. Adult male. B.M. no. 5. 11. 3. 41. Obtained 

 15th (September, 1904, by Cho, a native collector employed 

 by l\Ir. Alan Owston. 



The genus Lenothrfx is an interesting one, as connecting 

 Lenomys with Mus. It possesses the cranial characters and 

 many of the molar foldings of the former, while, like tlie 

 latter, it has lost the important postero-internal cusp x of the 

 up])er molars *. 



The British Museum now possesses a good series of all 

 the mammals known to inhabit the Liu Kiu Lslands. To 

 Mr. Boidiote^s list t there should be added the present 

 striking and peculiar species and a Cervus of the C. sika 

 group. The *' Ixhiyiolojihus minor" of the list has since been 

 described by Mr. Knud Andirsen as R. cornutua pumilus %> 

 and a Mus nomgicus is contained in j\lr. Owston's colltction, 

 thus confirming its occurrence in the islands, on which doubt 

 -was tluown by Mr. Bonhote. 



♦ Cf. supn), p. 8o. 



t Nov. Zo(»l. ix. p. 028 (1002). 



\ P. Z. .S. I'.H).",, i. p. li'7. 



