13 



ORDER IV. TOXODONTIA. 



55. Nesodontidae ~ Nesodon, Owen, Ph. T., 



1853, 291. 



56. Toxodontidae Toxodon, Burm, A. M. 



B.-A., i, 254, 1864. 



ORDER Y. HYRACOIDEA. 



57. Hyracidae = Hyracidae, Gray, C. P. & E. 



M., 279. 



ORDER YL PROBOSCIDEA. 



58. Elephantidae < Proboscideae, Falc., Pal. 



Mem., ii, 1868. 

 Elephantinae = Elephantidae, Gray, C. P. & 



E. M., 358. 

 Mastodontinae = Mastodontidae, Gray, C. P. & 



E. M., 359. 



59. Dinotkeriidae = [Dinotheriides,] Gaudry, An. 



F. Att., 321, 162. 



MUTILATE SERIES. 

 ORDER YIL SIRENIA. 



(ffalicoroidea.) 



60. Halitheriidae < Halicorida, Brandt, Symb. 



Siren., ii, (f. 3,) 344. 



