HYOPOTAMUS—HYPERFELIS. 309 
Hyopotamus Kavr, 1844. Ungulata, Artiodactyla, Hippopotamid:e. 
Class. Siugeth. und Vogel, 78, 1844. 
Type: Hippopotamus minutus Cuvier (Oss. Foss., nouv. ed., V, pt. ir, 527, 1824), 
from the Eocene of the Paris basin, France. 
Extinct. 
Hyopotamus: Us, bs, hog; worapeds,. river 
aquatic habits. 

‘river hog,’ from its supposed 
Hyopotamus Owen, 1848. Ungulata, Artiodactyla, Anthracotheriidee. 
Quart. Journ. Geol. Soc. London, IV, pt.1, No. 14, pp. 103-126, pl. vir, figs. 1-8, 
10-21, May 1, 1848; Hay., Cat. Foss. Vert. N. Am., Bull. 179, U. S. Geol. 
Surv., 652, 1902 (type fixed). 
Species: Hyopotamus vectianus Owen, and H. bovinus Owen (type), from the Eocene 
deposits on the northwest coast of the Isle of Wight, England. 
Name preoccupied by Hyopotamus Kaup, 1844, a genus of Hippopotamid:e. 
Extinct. 
Hyops LeContr, 1848. Ungulata, Artiodactyla, Tayassuid:e. 
Am. Journ. Sci. & Arts, 2d ser., V, No. 13, p. 104, Jan., 1848. 
Type: Hyops depressifrons Le Conte, from ‘the Pleistocene of the lead region of 
Illinois." 
Extinct. 
Hyops: $e, 66s, hog; ow, aspect. 
Hyopsodus Leipy, 1870. Primates, Hyopsodide. 
Proc. Acad. Nat. Sci. Phila., Oct. 4, 1870, 109-110; Prelim. Rept. U. S. Geol. 
Surv. Montana, etc., for 1872, 362; OsBonN, Bull. Am. Mus. Nat. Hist., N. Y., 
XVI, 180-188, figs. 5-16, June 28, 1902. 
Type: Hyopsodus paulus Leidy, from the Eocene near Fort Bridger, Wyoming. 
Extinct. Based on ‘‘a portion of the right ramus of a lower jaw . . . contain- 
ing the true molars, much worn,’’ etc. 
Hyopsodus: Hyops; 6650vs, tooth. 
Hyotapirus Pontiac, 1888. Ungulata, ? 
Nova Acta Acad. C:es. Leop.-Carol., LIII, Nr. 1, p. 257, 1888 (nomen nudum). 
Hypothetical genus provisionally proposed for the intermediate form between 
the Artiodactyla and the Elephantid:ze and their supposed common ancestor 
Prototapirus. 
Hyotapirus: Us, bos, hog; + Tapirus. 
Hyotherium Meyer, 1834. Ungulata, Artiodactyla, Suid:e. 
Foss. Ziihne und Knochen von Georgensgmünd in Bayern, in Mus. Sencken- 
berg., Suppl. Band I, 30-31, 43-62, Taf. ir, figs. 9-17, 1834; Mus. Senckenb. 
Abhandl., I. 289, 1834. 
Type: Hyotherium sómmerringii Meyer, from the Upper Miocene in the vicinity 
of Georgensgmünd, Bavaria. 
Extinct. Based on teeth. 
Hyotherium: ts, 66s, hog; 65píov, wild beast—i. e., an extinct hog-like beast. 
Hyperacrius (subgenus of Microtus) Mituer, 1896.  Glires, Murid:e, Microtin:e. 
N. Am. Fauna, No. 12, pp. 9, 54-55, figs. 27b, 28, pl. 1 fig. 11, July 23, 1896; 
Proc. Acad. Nat. Sci. Phila., 1899, 289-291, fig. 3. 
Type: Arvicola fertilis True, from the Pir Panjal Range, Kashmir (alt. 8,500 ft. ). 
Huyperacrius: oi ó6zep«&kpioi inhabitants of the heights—in allusion tothe elevated 
habitat of the type species. 
Hyperaodon (see Hyperoodon ). Cete, Physeteridze. 
Hyperfelis Inprs, 1869. Ferz, Felidee. 
Bull. Soc. Géol. de France, 2* sér., XXVI, No. 1, feuille 2, pp. 22-24, Mar. 1869. 
