308 



nODENTIA. 



MURIB/F 



MURIDJR. 



BROWN RAT. 



NORWAY RAT. 



Mus decumanus. (Pall.) 



Spccijir Charnclcr. — Greyish -bro-rni above, -whitish beneath ; ears one-thirJ 

 the length of the hca<l; tail shorter than tlie body. 



Mils ikcumanus, Pallas, Glir. p. 91. Gmel. Syst. Nat. Linn. I. p. 127. 



Desmar. Mamm.al. p. 473, sp. 473. Flem. Brit. An. 



p. 20. jEsrNS, Brit. Vert. p. 32. Blas. Wirbelt. Deutsoh. 



I. p. 313. 

 Belsson, He;;. An. p. 173. Erxleb. Syst. p. 381, 1. 

 Bdffon, Hist. Kat. VIII. ji. 206, t. xxvii. Fu. Cotier, 



Mammal. I. 

 Penn. Brit. Zool. I. p. 115. Shaw, Gen. Zool. II. p. .51, 



t. C-\XX. 



,, norvc<ju'U^. 

 iSaniiidot, 



NorvKiy Raf, 



The geographical distribution of animals, although a 

 subject of great interest, and one which has of late years 

 occupied the attention of many eminent zoologists, is 

 not yet sufficiently understood to furnish any very well- 

 defined laws, either with reference on the one hand to 



