1896.] GBNBHA OF RODENTS. 1025 



131. Cannahateomys, Jent. 



Notes Leyd. Mus. siii. p. 105 (1891). 



132. Lonchercs, 111. 



Prodr. Syst. Mamm. p. 90 (1811). \Lad- 

 uromys, Dey. Eev. Zool. (2) iv. p. 353 

 (1852).] 

 (V) 133. Thrichomys, Trouess. 



Bull. See. Sci. Angers, 1880, p. 179. 

 [Nelomys, Lund, nee Jourd.] 



134. Qercomys, F. Ouv. 



Mamm. 6° livr. (1829). 



135. Garterodon, Waterh. 



Nat. Hist. Mamm. ii. p. 351 (1848). 



136. Mesomys, Wagn. 



Arch. f. Nat. 1845, pt. i. p. 145. 



137. Echinomys, Desm. 



N. Diet. d'H. N. x. p. 54 (1817). 



D. CArnojtxiNif:, 



138. Myocasior, Kerr '. 



Linn. An. K. p. 225 (1792). [Myopoiamus, 

 Geoff. Ann. Mus. vi. p. 81 (1805).] 



139. Capromys, Desm. 



Mem. Soc. d'H. N. i. p. 44 (1822). 



140. Plagiodontia, F. Cuv. 



Ann. Sci. Nat. (2) vi. p. 347 (1836). 



141. Thryonomys, Fitz. 



SB. Ak. Wien, Ivi. p. 141 (1867). [Aula- 

 codus, Temm. Mamm. i. p. 245 (1827), 

 nee Eschsch. Triaidacodus, Lyd. GeogT. 

 Distr. Mamm. p. 91 (1896).] " 



XIV. HystricidaB. ■ 



142. Hystrix, Linn. 



S. N. (10) i. p. 56 (1758). 



143. Atlierura, G. Cuv. 



Ecgne Anim. e'd. 2, i. p. 215 (1829). 



144. Trichys, Giinth. 



P. Z. S. 1876, p. 739. 



XV. ErethizontidaB '. 



A. EKETniZONTINjE. 



145. Erethizon, F. Cuv. 



Mem. d. Mus. ix. p. 426 (1822). 



' See J. A. Allen, Bull. Am. Mua. N. H. vii. p. 182 (1895). 



° The wide difference between the American and the Old World Porcupines 

 has been realized by nil naturalists, and after Mr. Parsons' strong observations 

 on the differences in their myology (P. Z. S. 1894, p. 295), it seems better 

 definitely to separate them into two families. With regard to Chatomys, the 

 great difference between its teeth and those of the other Erethhontid<s makes it 



66* 



