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Show 1896.] GENERA OF RODENTS. 1025 131. Cannabateomys, Jent. Notes Leyd. Mus. xiii. p. 105 (1891). 132. Loncheres, 111. Prodr. Syst. Mamm. p. 90 (1811). [Lasl-uromys, Dev. Rev. Zool. (2) iv. p. 353 (1852).] (b) 133. Thrlchomys, Trouess. Bull. Soc. Sci. Angers, 1880, p. 179. [Nelomys, Lund, nee Jourd.] 134. Cercomys, P. Cuv. Mamm. 6C livr. (1829). 135. Carterodon, Waterh. Nat. Hist. Mamm. ii. p. 351 (1848). 136. Mesomys, Wagn. Arch. f. Nat. 1845, pt. i. p. 145. 137. Echlnomys, Desm. N. Diet. d'H. N. x. p. 54 (1817). D. CAPROMYINJE. 138. Myocastor, Kerr1. 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. Plaglodontla, F. Cuv. Ann. Sci. Nat. (2) vi. p. 347 (1836). 141. Thryonomys, Pitz. SB. Ak. Wien, lvi. p. 141 (1867). [Aula-codus, Temm. Mamm. i. p. 245 (1827), nee Eschsch. Trlaulacodus, Lyd. Geogr. Distr. Mamm. p. 91 (1896).] XIV. Hystricidae. 142. Hysirlx, Linn. S. N. (10) i. p. 56 (1758). 143. Aiherura, G. Cuv. Regne Anim. e'd. 2, i. p. 215 (1829). 144. Trlchys, Giinth. P. Z. S. 1876, p. 739. XV. ErethizontidaB2. A. ERETHIZONTINJE. 145. Erethlzon, P. 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 Porcupines has been realized by all naturalists, and after Mr. Parsons' strong observations on tbe differences in their myology (P. Z. S. 1894, p. 295), it seems better definitely to separate them into two families. With regard to Chcetomys, tbe great difference between its teeth and those of tbe other Erethizontidce makes it 66* |