APPENDIX 387 



Lepus europeeus. The Common Hare. 



(Very common throughout England. Found also in Wales and 

 Scotland; but of recent introduction into Scotland, and 

 scarce in the extreme north. Absent from Ireland, from the 

 Hebrides, and from the Scottish islands.) 



Sub-order, SIMPLICIDENTATA. RODENTS with only one 

 pair of incisor teeth in both jaws. 



Family, SCIURIDM. The SQUIRRELS. 



Sclurus vulgaris. The Common Squirrel. 



(Very abundant throughout England and Wales. Less commonly 

 met with in Ireland and Scotland.) 

 Spennophilus dtillus. The Suslik. 



(Extinct. Inhabited England during the Pleistocene Period.) 



Family, CASTORID^. The BEAVERS. 

 Castor fiber. The Beaver. 

 (Extinct. Inhabited England, Wales, and Scotland from the 

 Pleistocene Period down to relatively recent times — eighth 

 century in England, sixteenth century in Scotland. Absent 

 from Ireland.) 

 Trogontherium cuvieri. The Giant Beaver. 

 (Extinct. Inhabited Eastern England at the beginning of the 

 Pleistocene Period.) 



Family, GLIRID^. The DORMICE. 



Muscardinus avellanarius. The Common Dormouse. 



(Common in the south and centre of England and the south of 

 Wales. Much scarcer in the north of England. Has never 

 been recorded from Scotland, and is entirely absent from 

 Ireland.) 



Family, MURID^E. The RATS and MICE. 

 Mus decumanus. The Brown Rat. 



(Only introduced into the British Islands through the agency 



of man at the commencement of the eighteenth century. 



Now universally distributed throughout Great Britain and 



Ireland.) 

 Mus rattus. The Black Rat. 



(Probably introduced by the agency of man into these islands 



in the eleventh century. At one time very abundant, but 



now becoming scarce. It is found in parts of Northern 



England, and in Scotland and Ireland.) 



