730 RODENTIA—MURID/= 
CRANIAL DIMENSIONS OF 4. f thuleo. 
(Arranged for comparison with the Table at pp. 538 and 539.) 



a Measurements in * 
Number of Skulls examined :—8. millineteass Reductions. 
1. Condylo-basal length . . x 23°8 to 25 
” ” average 24:5 100 
2. Occipito-nasallength . . : 2671 to 27°2 108 to 109°5 
109 
8. Zygomaticbreadth . . .- 18°2 ,, 141 54°9 to 56°6 
558 
4. Interorbital breadth . . 5 4 rey es 16 to 17°2 
165 
5. Cranial breadth . ; 4 DUG yy) are 47°8 to 49°2 
48°5 
6. Cranial depth (middle) c J MF KG 32°5 to 34°8 
33°4 
7. Condyletoms . : : > 11:2), 21:8 46°8 to 48°8 
473 
8. Condyle tofront of bulla. . GA ayy Gln 26 to 27-2 
26°6 
9. Nasal length 5 5 3 s Orb lyse, O58 89 to 40 
39°5 
10. Nasal width . 4 r 3 2 RECS aay ere 9°75 to 10-9 
104 
11. Palatallength . r 3 : WET pee eri} 62°5 to 54:9 
541 
12. Diastema o 5 = < . 6:9 4, 76 28°7 to 30-9 
29°5 
13, Incisive foramina (length) . “ Gey ay AR 22°8 to 25°6 
23°8 
14. Incisive foramina (width) . : 92) Sy} 72 to 84 
77 
15. Rostral breadth . 7 . 44 ,, 4:8 18°2 to 19-2 
18°7 
16. Masseteric plate (least width) . ON EHS 9°9 to 10-7 
10:4 
17. Maxillary cheek-teeth . ° 3 336 5, 8:8 14:4 to 15°7 
15 

History and Status :—The material upon which this sub-species was 
based consists of thirty-seven specimens collected for Dr Eagle Clarke, 
chiefly by Mr W. H. Greenaway. Foula lies out in the Atlantic 16 
miles west of the nearest point of the mainland of Shetland. It is 
3 miles long and 1} miles broad, with an area of little more than 
5 square miles. Rising from the sea in lofty cliffs, which swarm 
with sea-fowl during the breeding season, its highest point attains 
an altitude of 1372 feet. Mr Greenaway found the mice, which are 
termed “Hill Mice” by the inhabitants, on rough ground from the 
foot of the hills up to 1000 feet above sea-level, and remarks that it is 
surprising how they survive the storms and trials of the Foula winter. 
a 2 ey ea 
