S50 



MURID^— APODEMUS 



The skiill and teeth have been described above under the species. 

 For cranial dimensions, see table at p. 518. 



De Winton {pp. cit., 443) mentions that the tail is made up of 

 30 vertebrae, instead of 27 as in sylvaticus ; but de I'lsle {Ann. Sci. 

 Nat. Zool., 1865, iv., 215) has pointed out how variable the skeleton of 

 the Field Mouse is in such respects. The tail is stated by Adams 

 {in lit.) to be relatively robust as compared with that of sylvaticus. 



DIMENSIONS IN MILLIMETRES :— 



1 Testes quite small ; pelage almost adult. 



2 Tail imperfect, foot with claws: neither included in average; weight stated as '*1 oz., plus 1 shilling 

 piece " = lj^ oz. 



