UNGULATA PEUISSODAC'I YLA & ARTIODACTYLA. Mamm. 19 
spp. nn. (foss.), H. F. Osboru, W. B. Scott, & F. Speir, Rep. Prince t. 
Exp., Eocene of Wyoming. 
\f Pal(Eosyops paludosus : remains figured : iid. 1. c. pi. iii. P. major: the 
innominate bone figured ; 1 . c. pi. v. 
Leurocephalus cultridens^ g. & sp. nn. (foss.), iid. 1. c. p. 42, pi. iv,, 
Eocene of Wyoming. Allied to PalcEosyops. 
s^Helaletes latidens, sp. n. (foss.), iid. 1. c.p. 64. 
'lAncMrodon^ g. n. (foss.) [type, Hyracodon quadriplicatus. Cope], E. D. 
Cope, Am. Nat. xiii. p. 270 ; also Bull. U. S. Geol. Surv. v. pp. 233. Its 
affinities are uncertain, being in some respects allied to Rhinoceros^ in 
others to Lophiodon, Hyrachyus^ &c. A. tubifer^ sp. n. (foss.), id. 1. c. 
p. 271, Oregon. 
Hyracodontidjc. 
Hyracodon : further observations on its structure ; E, D. Cope, Bull. 
U. S. Geol. Surv. v. p. 234. It should form a separate fa,niily, as above ; 
p. 228. 
Equid^e. 
Equus. Notes on hybrids in this genus, and description of orie between 
E. hemioniis and E. hurchelliy which is figured ; Huet, N. Arch. Mus. (2) 
ii. pp. 46-52, pi. iv. 
Hipparion. On the occurrence of a species of this genus in Algeria ; 
A. Pomel, Bull. Soc. Gdol. (3) vi. pp. 213-216. 
Anchitherium prccstans, E. D. Cope, Am. Nat. xiii. p. 462, Oregon 
equiceps, p. 73, A. hrachyloplium, p. 74, A. longicristis, p. 76, spp. nn., 
(foss.), id. P. Am. Phil. Soc. xviii., Miocene of Oregon, 
'^Orohippus major. Remains figured, Osborn, Sco,tt, & Speir, Rep. 
Princet. Exp. pi. ix. 
'■JStylonus seversus, g, & sp. nn, (foss.), E. D. Cope,P. Am. Phil. Soc. xviii. 
p. 76, Pliocene of Oregon, Allied to AnchippMS and flippotherium. 
UNGULATA ARTIODACTYLA. 
HlPPOPOTAMIDiE. 
'^Hippopotamus amphibius. On its natural term of life, &c, ; R. Owen, 
Ann. N. H. (5) iii. pp. 188. On some minor points in its anatomy ; E. 
Alix, Bull. Soc. Philom. (7) iii. pp. 146, 167, & 168. II . hipponensis : 
note on the precise horizon of this species ; Passer, Bull. Soc. G4ol. (3) vi. 
pp. 389-391. 
AnTHRAlCOTHERIID.®. 
Ccenotherium. On a jaw discovered at Aix (Bouches du Rhone) ; F. 
Cairol, C. R. Ixxxviii. p. 987. 
^Hyopotamus guyotianus, sp. n. (foss.), E. D. Cope, P. Am. Phil. Soc. 
