1866.] PROF. W. LILLJEBORG ON THE NARWHAL. 559 



teeth, and the other apparently full-grown, but without tail, and 

 with the head injured. Only so much is to be seen, that they belong 

 to the short-eared Mice, like our M. ayrarius and M. minutus. 



A third and seemingly hitherto undescribed species, of very dimi- 

 nutive size, fortunately is represented by numerous specimens in a 

 tolerable good state. 



MUS BEAVANII, n. Sp. 



Above rusty brown, medially black ; lips and the whole underside 

 pale ochraceous ; feet white, all the hair being slate-coloured at the 

 base ; tail above brown, below with white hairs ; upper whiskers 

 black, lower white. Rather smaller and more delicately built than 

 our Common Harvest-Mouse. Ears rounded, and, when laid for- 

 wards, reaching to the eye. The proportions of the fingers, toes, 

 and nails appear to be the same as in Mus minutus ; only the outer 

 toe is proportionally a little shorter. The band-sole bas five, and the 

 foot-sole six pads, which are much smaller and more pointed than 

 in that species. The female has five pairs of teats, two between the 

 legs, one before and two behind the armpit. Tail scantily covered 

 with short rigid hair. The teeth have exactly the same form and 

 the same relative proportions as in Mus decumanus. 



Measurements of a full-grown female with very developed teats, 



which show that she had been nursing : — 



° metre. 



From snout to base of tail 0-058 



Length of tail 0'054 



of head 0-022 



From the snout to the eye 0-009 



From the eye to the ear 0"006 



Length of ear 0-010 



Breadth of ear 0009 



Length of hand with claws - 006 



• of foot with claws 00 14 



of skull 0-017 



of row of molars 0-0035 



This species cannot be confounded with Mus minutus, which has 

 much shorter ears, ouly four pairs of teats, the outer toe longer, and 

 much broader pads on the soles. 



3. Note on the Geographical Distribution of the Narwhal 

 {Mono don monoceros). By Prof. W. Lilljeborg, F.M.Z.S. 



In my ' Synopsis of the Cetaceous Mammalia of Scandinavia,' 

 published by the Ray Society (1866), it is stated at page 245 that 

 " there is a drawing at the Landbohogskola, at Copenhagen, repre- 

 senting a Narwhal that was stranded in 1803 in the Kielerbugt." 

 This I find is a mistake, as Professor Bernhardt informs me that the 

 drawing in question really represents a Hyperoodon, the specimen 



