1896. ] GENERA OF RODENTS. 1025 
131. Cannabateomys, Jent. 
Notes Leyd. Mus. xii. p. 105 (1891). 
132. Loncheres, Il. 
Prodr. Syst. Mamm. p. 90 (1811). [Zasz- 
uromys, Dey. Rev. Zool. (2) iv. p. 353 
(1852). ] 
(6) 133. Thrichomys, Trouess. 
Bull. Soc. Sci. Angers, 1880, p. 179. 
[Nelomys, Lund, nec Jourd. | 
134. Cercomys, F. Cuv. 
Mamm. 6° livr. (1829). 
135. Carterodon, Waterh. 
Nat. Hist. Mamm. ii. p. 351 (1848). 
136. Mesomys, Wagn. 
Arch. f. Nat. 1845, pt. i. p. 145. 
137. Echinomys, Desm. 
N. Dict. @H. N. x. p. 54 (1817). 
D. CaPROMYINE. 
138. Myocastor, Kerr’. 
Linn. An. K. p. 225 (1792). [Myopotamus, 
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, lvi. p. 141 (1867). [Aula- 
codus, Temm. Mamm. i. p. 245 (1827), 
nec Eschsch. Triaulacodus, Lyd. Geogr. 
Distr. Mamm. p. 91 (1896).] 
XIV. Hystricide. 
142. Hysiriv, Linn. 
S. N. (10) i. p. 56 (1758). 
148. Atherura, G. Cuy. 
Régne Anim. éd. 2, i. p. 215 (1829). 
144, Trichys, Giinth. 
P. Z.8. 1876, p. 739. 
XY. Erethizontide *. 
A. ERETHIZONTINE. 
145. Erethizon, F. Cuv. 
Mem. d. Mus. ix. p. 426 (1822). 
1 See J. A. Allen, Bull. Am. Mus. N. H. vii. p. 182 (1895). 
2 The wide difference between the American and the Old World Poreupines 
has been realized by all naturalists, and after Mr. Parsons’ strong observations 
on the differences in their myology (P. Z. 8. 1894, p. 295), it seems better 
definitely to separate them into two families. With regard to Chetomys, the 
great difference between its teeth and those of the other Erethizontide makes it 
66* 
