164 Proccedinrjs of the Royal Pliysical Society. 



blackish at the base, broadly margined with reddish brown. 

 A number of thinly distributed black hairs are also present. 

 Under surface a mixture of buff and pale grey, intergrading 

 on the flanks with the tints of the upper surface. The 

 ventral fur is pale grey at the base, broadly edged with buff. 



Dimensions. — $ ad. (measured in the flesh), head and 

 body, 103 mm.; tail, 95 mm.; ears, 14 mm.; hind foot, 

 21mm.; skull, 24*7 mm. Another $ ad., in skin, is equally 

 large. J (in spirit), head and body, 95-5 mm. ; head, 

 27*8 mm. ; tail, 96*4 mm. ; ears, 13*5 mm. ; hind foot, 

 20'2 mm. ; skull, 24*3 mm. 



The type specimen is in the Edinburgh Museum of 

 Science and Art. 



Professor Bradley has most kindly examined and reported 

 upon the skulls of both the Fseroese and typical forms, and 

 informs me that he cannot find any difference either by 

 inspection or by measurements. It is important to state 

 that he did not detect any narrowing of the posterior narial 

 openings which characterise the St Kilda, and, as we shall 

 see, Myggenes forms. In this connection, however, Mr 

 Barrett-Hamilton informs me that in his experience minute 

 cranial differences often prove unsatisfactory. 



After examining the Naalsoe mice, I wrote to my valued 

 correspondent, Herr Herluf Winge, of the Copenhagen 

 Museum, asking him for any information he could afford 

 me concerning mice from the Fseroe Islands, and I reproduce 

 in full his interesting reply: — 



" Of Mus musculus from the Faeroes I have only seen three 

 specimens ; they have been procured for me by some of my 

 friends on Myggenes. One of them was caught in the wild 

 bird-rocks during the night of March 6th last year [1903] ; 

 the two others have been taken in houses in the town of 

 M} ggenes. All of them are of a very remarkable variety ; 

 very stout, with exceptionally large feet, ' wild-coloured ' 

 (i.e., without the sooty colour common in specimens taken in 

 large towns), and with the posterior nasal opening, in the 

 skull, contracted. I have entered them in the Journals of our 

 Museum as ' Mus musculus, var., cf. Mus muralis, Barrett- 

 Hamilton.' They are the greatest contrast to the weak 



