MAMMALS FROM THE INNER HEBRIDES. 941 



HB. T. HF. E. 



3. Adult c?, 1.7.22 119 39 18 12 



Type 5. „ $, 2.7.22 121 35 20 irS 



9. „ $, 2.7.22 129 38 19 irS 



1. „ ?, 30.6.22. 107- 35 19 11 



6. „ ?, 2.7.22 118 36 18 12-5 



12. „ $, 2.7.22 117 34 19 12 



13. Immature d' , 2.7.12 97 31 19 9 



2. ,, $,30.6.22 97 32 18 9-5 



Average of all adults (7) 1187 35-7 18-7 irS 



Description. This form is, externally, of peculiar appearance. 

 The long dorsal far is darkened, and rendered harsh by the 

 profuse abundance in it of long black hairs. There appear to 

 be present in the subspecies two types of ventral surface ; this 

 diversity may prove to be a secondary sexual character. Females 

 1, 12, 2 (imm.) have ventrally only short grey hairs, and exactly 

 resemble in this respect M. a. macgillivraii. Males 3, 5, 9, 

 13 (imm.), 127 and femsle 6 have, besides the short grey hairs, 

 longer hairs with tips pigmented brighter yellow than those of 

 the typical form, and distributed in similar irregular patches. 

 The character of K^o. 6 prevents one from formulnting a definite 

 opinion of the nature of this diversity until fvn^ther material is 

 available. 



In general body size and dimensions of appendages this form 

 resembles M. a. exsul. 



The skull shows a temporal shield like that of M. a. exsul in 

 its main characters, but resembling that of 31. a. macgillivraii 

 in certain minor respects. The shield is, further, unique in 

 showing angle a* greater than 90°; in all other forms examined 

 this angle is less than 90°. The posterior part of the palate is 

 grooved. The jugal is peculiar in showing in dorsal view an 

 abrupt anterior curve about 3 mm. from its junction with the 

 rostrum. The 4th inner angle of mi is distinguishable in all 

 specimens but is never more than vestigial. 



* See Diagram 2. 



