EUTRACHYTHERUS——EXOCHURA. 283 
Eutrachytherus AwrGnHiNo, 1897. Ungulata, Typotheria, Eutrachytheriide. 
Bol. Inst. Geog. Argentino, X VIII, 427—429, fig. 13, Oct. 6, 1897 (sep. pp. 24—3€). 
Eutrachytheres Rota, Am. Journ. Sci., 4th ser., IX, 264, Apr., 1900. 
New name for Trachytherus Ameghino, 1889, which is preoccupied by Trachythe- 
rium Gervais, 1849, a genus of Sirenia. 
Extinct. 
Eutrachytherus: £9, well, typical; + Trachytherus. 
Eutrictis (see Lutrictis). Ferze, Mustelidee. 
Eutrigonodon AmeEcuino, 1891. Ungulata, Toxodontia, Toxodontid:e. 
Revista Argentina Hist. Nat., I, entr. 4a, 240, Aug. 1, 1891. 
New name for 7rigodon Ameghino, 1887 (subsequently corrected to Trigonodon), 
which is preoccupied by Trigonodon Conrad, 1852, a genus of Mollusca. 
Extinct. 
Eutrigonodon: tv, well, typical; +-Trigonodon. 
zutrochodon Rorn, 1903. ? ? 
Revista Mus. La Plata, XI, 155, 1903. 
Type: Hutrochodon inceptus Roth, from the upper ‘Cretaceous’ of Lago Musters, 
Territory of Chubut, Patagonia. 
. Butrochodon: ev, well, typical; rpóyos, badger; 00v — 08 0c, tooth. 
Eutropia (subgenus of Delphinus) Gray, 1862. Cete, Delphinid:e. 
Proc. Zool. Soc. London, 1862, 145; Cat. Seals & Whales Brit. Mus., 262-263, 
1866; Proc. Zool. Soc. London 1866, 215 (raised to generic rank’. 
Eutrope Gray, Cat. Seals & Whales Brit. Mus., 255, 1866. 
Type: Delphinus eutropia Gray, from Chile. 
- Name preoccupied by Zutropia Humphrey, 1797, a genus of Mollusca. 
Eutropia: ev, well; rpózis (rpómios or rpómzi80c), keel—with a good keel—in 
allusion to the skull, which is described as 'strongly keeled in the centre 
behind.’ 
Eutypotherium Harcken, 1895. Ungulata, Typotheria, Typotheriidz. 
Syst. Phylogenie Wirbelthiere, III, 502, 1895. 
Hypothetical genus from South America. 
Eutypotherium: £0, well, typical; ++ Typotherium. 
Eutypotherium Rorn, 1901. Ungulata, Typotheria, Typotheriide. 
Revista Mus. La Plata, X, 256, Oct., 1901 (sep. p. 8). 
Type: Hutypotherium lehmann-nitschei Roth, from the upper Tertiary of Laguna 
Blanco, Territory of Chubut, Patagonia. 
Name preoccupied by Eutypotherium Haeckel, 1895, a hypothetical genus of 
Typotheria. Replaced by Tachytypotherium Roth, 1903. 
Evotomys Cours, 1874. Glires, Muride, Microtine. 
Proc. Acad. Nat. Sci. Phila., 1874, 186-187; MirrER, N. Am. Fauna, No. 12, pp. 
42-44, pls. 1-111, text figs. 18-19, July 25, 1896; Battery, Proc. Biol. Soc. Wash., 
XI, 113-138, pl. m1, May 13, 1897; Mruuer, Proc. Biol. Soc. Wash., XIII, 154, 
June 13, 1900 (name not invalidated by Anaptogonia). 
Euotomys ScnvrzE, Zeitschr. Naturwiss. Stuttgart, LX XIII, 203, Dec. 19, 1900. 
Eotomys ForsytH-Masor, Proc. Zool. Soc. London, 1902, pt. r, 107, June 1, 1902. 
Type: Mus rutilus Pallas, from Siberia. 
Evotomys: &v, well; ovc, @r0s, ear; tc, mouse—in allusion to the well devel- 
oped ears, which distinctly overtop the fur. 
Exochura Ko.enari, 1858. Chiroptera, Vespertilionide. 
Sitzungsb. Math.-Naturwiss. Cl. K. Akad. Wiss. Wien, XXIX, Nr. 9, 251-252, 
Mar. 1858. 
Exochura may be a supergenerie group. The type is not specifically mentioned, 
but the diagnosis is followed by a description of the ‘subgenus’ Amblyotus 
based on 4. atratus Kolenati, from the mountains of Silicia, Austria. 
Exochura: &oxos, standing out; odpa, tail. 
