ESCHATIUS— EU ARCTOS. Dial 
Eschatius Corr, 1884. Ungulata, Artiodactyla, Camelidee. 
Palzeont. Bull., No. 39, p. 18, 1884; Proc. Am. Philos. Soc., XXII, pt. 1, for Jan., 
1885, 18-21, Oct. 21, 1884; Hav, Cat: Foss. Vert. N. Am., Bull. 179, U. S. Geol. 
Surv., 680, 1902 (type fixed). 
Eschatinus W. L. ScrATER, Zool. Record for 1885, X XII, Mamm., 43, 1886. 
Species: Eschatius conidens Cope (type), and EF. longirostris Cope, from the Plio- 
cene of Tequixquiae, on the northern edge of the Valley of Mexico. 
Extinct. 
Eschatius: é6yar1os, €6xatos, farthest, extreme—in allusion to ‘‘the reduction 
of the fourth superior premolar to a simple cone, in place of the usual double 
crescent characteristic of the Ruminantia generally. This is the greatest 
known reduction of the premolar series in the Ruminatia.’’? (Cope. ) 
Eschrichtius (subgenus of Meguptera) Gray, 1864. Cete, Balzenidee. 
Ann. & Mag. Nat. Hist., 3d ser., XIV, 350, Nov., 1864; Proc. Zool. Soc. London, 
1865, 40-43, 1 fig. in text nu io generic un 
Species: Balznoptera robusta Lilljeborg (type), from the Northern Seas; and 
Megaptera novezealandix Gray, from New Zealand. 
Eschrichtius: In honor of Daniel Fredrik Eschricht, 1798-1863, author of several 
important papers on cetaceans. 
Essonodontherium AwraniNo, 1884. Edentata, Megatheriidee. 
Filogenía, 230, 1884; Cont. Conocimiento Mamif. Fósil. Repub. Argentina, in Act. 
Acad. Nac. Cien., Córdoba, VI, 672-673, 1889. 
Type: Megatherium gervaisi Gervais & Ameghino, from the Rio Salado, Argentina. 
Extinct. Based on a complete skull. 
Essonodontherium: 766@r, less, weaker; 0ócv, tooth; 07piov, wild beast. 
Essoprion AmEGHINO, 1891. Marsupialia, Epanorthide. 
Nuevos Restos Mamít. Fós. Patagonia Austral, 20-21, Aug., 1891; Revista Argen- 
tina Hist. Nat., I, entr. 5*, 306-307, Oct. 1, 1891. 
Species: Zssoprion coruscus Ameghino, and E. consumptus Ameghino, from the 
Lower Eocene of southern Patagonia. 
Extinct. 
Essoprion: 7667, less, weaker; zpícv, saw. 
Esthonyx Corr, 1874. Tillodontia, Esthonychid:e. 
Rept. Vert. Fossils New Mexico, 6-7, Nov. 28, 1874; Ann. Rept. Chief of Engi- 
neers U. S. A., App. FF 3, for 1874, 594-596. 
Type: Esthonyx bisulcatus Cope, from the Eocene of New Mexico. 
Extinct. 
Esthonyx: à60£c, to clothe; óvv&, claw, nail—in allusion to the lower incisors 
with a long, narrow covering of enamel on the external face, ‘‘ which may be 
compared with the extremities of the slender fingers of some monkeys with 
narrow nails. (Cops, l. c. 594.) 
Eteocles Gray, 1821. Insectivora, Tenrecid:e. 
London Med. Repos., XV, 301, Apr. 1, 1821. 
Type: Erinaceus subspinosus Cuvier! (misprint for E. semispinosus Cuvier ?). 
Eteocles:' EreokAys, Eteocles—in Grecian mythology, son of CEdipus and Jokasta, 
and brother of Polynices. 
Euarctos (subgenus of Ursus) Gray, 1864. Fer, Ursidee. 
Proc. Zool. Soc. London, 1864, 692-694; MERRIAM, Proc. Biol. Soc. Wash., X, 78, 
Apr. 13, 1896. 
Species: Ursus americanus Pallas (type), from eastern North America; and U. ame- 
ricanus cinnamomeus Audubon & Bachman, from the northern Rocky Mts. 
Euarctos: ev, well, typical; &exros, bear. 
