464 Mr. W. E. de Winton on Two new 



The general colour of this mouse seems to come between 

 " Vandyke " arid " burnt umber " of Ridgway. The long 

 shining hairs are very conspicuous, as they are fully twice 

 the length of the rest of the coat and wave with their own 

 weight as the specimen is turned about in the hand ; a closer 

 examination shows that these hairs are of very peculiar 

 shape, being exceedingly fine for more than half their length, 

 then increasing several diameters and ending in a point ; thus, 

 when a single hair is extracted and laid on the table it 

 resembles a miniature porcupine-quill on the end of a fine 

 piece of wire. The fore feet are very typical of the genus, 

 and there is nothing out of the common in the structure of 

 the hind feet ; the first toe reaches to base of second, fifth to 

 end of first phalanx of fourth ; pads, first four are large, last 

 two small, all pointed ; soles smooth and naked. 



Type, ? in al. (97. 2. 21. 4 in British Museum) : 

 Mammae 12 = 6. Head and body 141 millim. ; tail 190; 

 hind foot 29 ; ear 18. 



A younger < : Head and body 132 ; tail 185 ; hind 

 foot 28 ; ear 17. 



LOG. Efulen, Cameroons. 



The skull somewhat resembles that of M. univittatus, but 

 is more ridged. In profile it is arched ; it is rather short and 

 broad, bumpy and angular ; supraorbital and temporal ridges 

 strongly developed, forming well-marked angles at the junc- 

 tion of the frontals and parietals, and also in the middle of 

 the latter over posterior roots of zygomata ; the ridges con- 

 tinue back to join the occipital ridge, forming a polygonal 

 pattern on the top of the skull, only open across the inter- 

 orbital constriction ; the zygomata, bowed evenly downwards, 

 are of nearly equal thickness throughout. Auditory bullaa 

 very small. The molars are exceedingly simple ; in neither 

 of the specimens to hand is there any sign of cusps, and the 

 pattern of the enamel folds is perfectly plain, with none of 

 the minor folds found in a greater or less degree of develop- 

 ment in the teeth of nearly every member of the genus. 

 Upper incisors orange-yellow, lower rather paler. The 

 palatal foramina barely reach a line drawn between the front 

 roots of molars ; the postnarial opening is rounded and open, 

 the back of the palate barely extending to the level of the 

 back of the molar series. 



Mandibles short and deep, condyles set very high nearly to 

 level of coronoids, which are small ; the back line is very 

 little bowed in from the perpendicular. 



Skull measurements : Greatest length 37'5 millim., 

 greatest breadth 18'5; breadth of brain- case 15, constr. 6*5; 



