ALSTON’S BANK MOUSE 423 
Description :—It is a quite distinct form of comparatively large size, 
but with relatively short ears and tail, and peculiar skull. 
In general size it approaches zorvegzcus, being larger than glarcolus 
but smaller than skomerenszs. The tail and ears are about as in g/areolus, 
the hind feet about as in morvvegicus or skomerensis. 
The colour is similar to that of adults of the deeply-tinted forms of 
glareolus, being deep “russet” above, the under-side richly washed with 
yellowish or buffy tints. 
The skull is larger than in g/areo/us, and agrees in size with that of 
norvegicus, as it does also in the heavy jugals, although the curvature 
of the zygomata is similar to that of g/areolus. The brain-case is very 
broad and smoothly convex, the temporal ridges being but faintly 
indicated even in aged skulls, and the parietal region in dorsal profile 
is not flattened but convex, with the highest point a little behind the 
middle of the parietals; these features impart an appearance of rela- 
tively greater cranial capacity than is seen in any other European 
DIMENSIONS IN MILLIMETRES :— 




Tail (with- | Hind foot Ear 
Head and out terminal] (without (greatest 
Ye hairs). claws), length). 
1. Male, aged, Mull, Scotland (R. W. 
Sheppard), 18th June 1912(type) . 108 44 18 11 
2. Male, ditto . 5 < c : = 110 | 44 19°5 11°5 
3. Male, ditto, 19th June1912 «St 103 | 44 18 | al 
| 
4. Female, ditto, 18th June 1912. 5 105 | 45 185 Hb, 
| 5. Female, ditto, 14th June 1912. = 100 42 18 10 
Average of five adult specimens of both 
sexes = c . é : 105°2 43°8 18°4 | 11 




species of Evotomys. The squamosal post-orbital processes are not con- 
spicuous. The inter-orbital region is broad, with a wide shallow median 
sulcus. The nasals are rounded or slightly and narrowly emarginate 
behind; they end flush with or slightly behind the ends of the pre- 
maxillaries, and are slightly longer than the diastema; they are 
macetllivrai, M. a. mial, and M. a. luch); in all, of six new forms. The work 
resulted in very material additions to our knowledge of the distribution of British 
mammals, and, in particular, of the relationships and classifications of the difficult sub- 
family of Mzcrotine, and has thrown much light on the origin of the recent British 
fauna. The collections made included 280 specimens of 11 species, and have been 
described by myself and Hinton in Proc. Zool. Soc. (London), 1913, 821; and 
Ann. Mag. Nat. Hist., October 1913, 361 ; a further paper is in contemplation. 
It may safely be said that no collection of British mammals has ever approached 
the present one in importance. 
