1026 MR. OLDPIELD THOMAS ON TUB [DeC. 15, 



146. Ooendou, Lac. 



Mem. de I'Inst. iii. p. 496 (1801). {Syne- 

 theres and Gercolabes, P. Cuv. Mem. Mas. 

 ix. p. 4:27 (1822).] 



B. Cn^TOMYINiE. 



147. OJuetumi/s, Gray. 



P.Z. S. 1848, p. 21. 



XVI. ChincMUidae. 



148. Chinchilla, Benn. 



Gard. Zool. Soc. i. p. 1 (1829). 



149. Lagidium, Mey. 



N. Act. Ac. Leop. xvi. p. 576 (1833). 



150. Lac/osiomus, Broolis. 



Trans. Linn. Soc. xvi. p. 102 (1828). 



XVII. Dasyprootidaj. 



151. Dasyproctci, 111. 



Prodr. Syst. Mamra. p. 93 (1811). 



152. Qoeloc/enys, P. Ciiv. 



Ann. Mus. x. p. 203 (1807). 



XVIII. DinomyidsB. 



153. Dinomys, Pet. 



MB. Ak. Berl. 1873, p. 551. 



XIX. CaviidsB. 



154. Gavia, Pall. 



Misc. Zool. p. 30 (1766). 



155. Dolichotis, Desm. 



Mamm. ii. p. 360 (1822). 



156. Hydroelueras, Briss. 



llegno Anim.p. 116 (1750). 



Suborder II. DUPLICIDENTATI. 

 P. LAGOMORPIIA. 

 XX. Ochotonidae. 



157. OcJiotona, Link. 



Boytr. Nat. ii. p. 74 (1795). [Lnr/omi/s' 

 G. Cuv. Tabl. Elom. p. 132 (1798).] 



at first siglit difficult, to believe tliiit it is really a member of the family at all, 

 and not a relative eitber of Loiicheres or Caloqeni/s, as Biirmeister suggested. 

 But further exauiinatiou leads mo to think lliat its dentjxl resembliuiee to 

 Lonchcres is only Buperfieial, and Unit its closeness to Ooendou in other rospecls, 

 including the identity of the structure of the feet and pterygoid regions, makes 

 it best placed as a peculiar subfamily of tlio Ercthhontida. 



' Lagomys (1798), as used for the Pikns, is doubly invalid, as it is both later 

 in date tlian Link's Ochotona, and is preoccupied by Storr's Lagomys (1780), 

 which is u synonym of Aixloiiigs (cf. Miller, Voles, p. 13, footnote 4). 



