HETERODON—HETEROSCIURUS. 020 
Heterodon—Continued. 
Extinct. 
Heterodon: étepos, other, different; 66@v=dédovs, tooth—in allusion to the 
inequality in size and form of the teeth. 
Heterogeomys Merriam, 1895. Glires, Geomyide. 
N. Am. Fauna, No. 8, pp. 23, 26, 179-185, numerous plates and figures, Jan. 31, 1895. 
Type: Geomys hispidus Le Conte, from the vicinity of Jalapa, Vera Cruz, Mexico. 
Heterogeomys: Evepos, different; + Geomys—i. e., different from true Geomys. 
Heteroglyphis Rorn, 1899. Ungulata, Litopterna, Macraucheniid:e. 
Revista Mus. La Plata, IX, 387, 1899; AmMEGHINO, Sin. Geol.-Pal:eont., Segundo 
Censo Nae. Repüb. Argentina, I, Supl., p. 12, July, 1899. 
Type: Heteroglyphis dewoletzky Roth, from the ‘upper Cretaceous’ of Lago Mus- 
ters, Territory of Chubut, Patagonia. 
Extinct. Based on a single upper molar. 
Heteroglyphis: £repos, other, different; y Avo»), carving, notch. 
Heterohyrax (subgenus of Dendrohyrax) Gray, 1868. Ungulata, Procaviid:e. 
Ann. & Mag. Nat. Hist., 4th ser., I, 50-51, Jan., 1868; Cat. Carn., Pachyderm., & 
Edentate Mamm. Brit. Mus., 295—294, 1869. 
Type: Dendrohyrax blainvillii Gray, from East Africa. 
Heterohyrax: &tépos, other, different; + Hyrax—tfrom the fact that the skull **has 
all the characters of the genus Dendrohyrax except that the orbit is incomplete 
behind." (Gray.) 
Heterohyus Gervais, 1848-52. Primates, Microchceridee? 
Zool. et Paléont. Frang., 1° ed., II, expl. pl. 35, fig. 14, p. 7, 1848-52; 2° ed., 
201-202, pl. 35, fig. 14, 1859. 
Type: Heterohyus armatus Gervais, from the Eocene of Buschweiller, Lower 
Alsace, Germany. 
Extinct. Based on a portion of the lower jaw with teeth. 
Heterohyus: repos, other, different; Us, &ds, hog. 
Heterolophodon horn, 1903. Ungulata, Ancylopoda, Homalodontotheriide. 
Revista Mus. La Plata, XI, 145-146, 1903. 
Type: Heterolophodon ampliatus Roth, from the upper ‘Cretaceous’ of Lago Mus- 
ters, Territory of Chubut, Patagonia. 
Extinct. Based on two upper molars. 
Heterolophodon: &repos, other, different; Ad@os, crest; 65@v=dd5o0vs, tooth. 
Heteromys Dersmarest, 1817. Glires, Heteromyidze. 
Nouv. Dict. Hist. Nat., nouv. ed., XIV, 180-181, 1817; Mammalogie, I, 313, 1820. 
Type: Mus anomalus Thompson, from the island of Trinidad, West Indies. 
Heteromys: €tépos, other, different; “0s, mouse—i. e., different from Mus. 
Heteropus JourDAN, 1837. Marsupialia, Macropodidee. 
Comptes Rendus, Paris, V, 522, 1837; Ann. Sci. Nat., Paris, 2° sér., VIII, Zool., 
368, Dec., 1837. 
Type: Heteropus albogularis Jourdan (=Kangurus penicillatus Gray), from the 
mountains southwest of Sydney, New South Wales. 
Name preoccupied by Heteropus Palisot de Beauvois, 1805, a genus of Orthoptera. 
Heteropus: Érepos, other, different; oc, foot—in allusion to the posterior limbs 
and tarsi, which are shorter than in other kangaroos, and exhibit other minor 
differences. 
Heterosciurus (subgenus of Scivrus) TRourssart, 1880. Glires, Sciuridee. 
Le Naturaliste, II, No. 37, p. 292, Oct. 1, 1880; Cat. Mamm., in Bull. Soc. à' Études 
Sci. d'Angers, X, 1** fasc., 69-73, 1880; Bull. U. S. Geol. & Geog. Surv. Terr., 
VI, No. 2, p. 304, Sept. 19, 1881; Euxna, Cat. Sist. Fauna Filipinas, I, 20, 1895 
(raised to generic rank); Tuowas, Proc. Zool. Soc, London, 1897, 933 (type 
given as S. erythraus Pallas). 
