neiv Mainvwh fron the Solomon Islands. 157 



vertical ridges, each running u]) to the lower side of one ot" 

 the cu])S above. Two secondary leaflets outside the horse- 

 shoe, the upper one unusually short and little extended, the 

 lower one running back to join the base of the posterior erect 

 leaf. Sella with a blunt projecting central point. Ears when 

 laid forward reaching just to the end of the muzzle, their tips 

 sharply pointed, with a marked concavity in the upper fourth 

 of their outer margin. A small frontal gland, opening trans- 

 veisely, present in the male. Wings from the ankles. 



Fur very long, soft, and silky. Colour a finely grizzled 

 greyish buff, the bases of the hairs slaty grey, their terminal 

 halves buff", their extreme tips brown. 



Dimensions of the type (female) : — 



Head and body 51 millira. ; head 21 ; ear (above crown) 

 17 ; forearm 51 ; index-finger 40 ; metacarpus of third finger 

 37 ; tibia 22 ; interfemoral membrane, depth in centre 20. 



Six specimens. 



Mus imperator^ sp. n. 



Size very large. Fur rather woolly in texture, uniformly 

 dark grizzled ashy grey above, whitish below. Ears short and 

 rounded ; laid forward they do not nearly reach to the eye. 

 Mammaj four, consisting of two inguinal pairs only. Soles 

 of feet broad and naked, the pads large, smooth, and but little 

 prominent. Tail rather short in proportion to the size of the 

 animal, naked, scaly, not markedly roughened. 



Dimensions (in spirit) : — 



Head and body. Tail, 

 millini. niillim. 



Male 350 258 



Female (type) .... 340 250 



Skull ( ? ) : basal length 60 millim., greatest breadth 35 ; 

 length of molar series 12*0 ; palatal foramen, length 7*0. 

 Two specimens. 



Mus rex^ sp. n. 



Closely allied to Mus imperator, but distinguished by its 

 much smaller (although still very considerable) size, and by 

 its much longer and extraordinarily roughened rasp-like tail. 



Dimensions (in spirit) : — 



Head and body. Tail. Hind foot. Ear. 



niillim. millim. millini. millim. 



Male (type) 290 290 65 18 



Female 270 285 M 16 



Skull ( c? ) : basal length 54 millim., greatest breadth 33; 

 length of molar series 11"1 ; length of palatal foramen 6'8. 



