698 INDEX GENERUM MAMMALIUM. 
Tylodon—Continued. 
Extinet. ‘‘Etablisur une portion considérable de mandibule." (GERVAIS, 1859.) 
“Die Gattung Tylodon Gervais ist auf einen aus Hyzenodon and Adapis künst- 
lich zusammengesetzten Unterkiefer errichtet." (Zrrrez, Handb. Palzeont., 
IV, 601, 1893.) 
Tylodon; róAosc, knob; 66@v=66o0vs, tooth—in allusion to the last lower molar. 
Tylomys (subgenus of Hesperomys) PETERS, 1866. Glires, Muridze, Cricetinze. 
Monatsber. K. Preuss. Akad. Wiss., Berlin, 1866, 404; Arsrow, Biol. Cent.-Am., 
Mamm., 143, 149-150, 1881; ArLEN, Bull. Am. Mus. Nat. Hist., New York, V, 
211-212, Sept. 21, 1893 (raised to generic rank). 
Type: Hesperoimys ( Tylomys) nudicaudus Peters, from Guatemala. 
Tylomys: róAoc, knob, knot; “0s, mouse—from *'the development of the upper 
edges of the orbits, which [in the type specimen] are spread into a sort of 
horizontal shelf, instead of rising into perpendicular supraorbital ridges as in 
Oryzomys." (ALSTON. ) 
Tylonycteris Prerers, 1872. Chiroptera, Vespertilionide. 
Monatsber. K. Preuss. Akad. Wiss., Berlin, 1872, 703. 
Type: Vespertilio pachypus Temminck, from ‘le district sauvage de Bantam,’ Java. 
Tylonycteris: róAos, knob, knot; vuKrepts, bat—‘clubfooted bat,’ from the fact 
that the under surface of the base of the thumbs and the soles of the feet are 
expanded into fleshy pads. 
Tylonyx ScnuvrzE, 1897. Glires, Muridze, Microtinee. 
"Mammalia Europea, in Helios, Abhandl. und Vortrüge Gesammtgebiete Natur- - 
wiss., Berlin, XIV, 83, 1897 (sep. p. 11). 
Type: Mus torquatus Pallas, from the Obi River, western Siberia. 
Name antedated by Dicrostonyx Gloger, 1841; Misothermus Hensel, 1855; and 
Borioikon Poliakoff, 1881. 
Tylonyx: tTUAOs, knob; 6vvé, claw—in allusion to the two middle fore claws, 
which are greatly enlarged in winter. (See Dicrostonyz. ) 
Tylostoma Gervais, 1855. Chiroptera, Phyllostomatidee. 
Expd. du Comte de Castelnau l'Amérique du Sud, Zool., Mamm. (44-45), 49, 
pl. vir fig. 3, 1855. 
Type: Phyllostoma bidens Spix, from Brazil. 
Name preoccupied by Tylostoma Sharpe, 1849, a genus of Mollusca. Replaced 
by Anthorina Lydekker, 1891. 
Tylostoma: roAos, knob, lump; 6róua, mouth—in allusion to the warts on the 
lower lip. 
Typhlodon Farcoxrn, 1868. Glires, Spalacid:e. 
Pal:ieont. Memoirs and Notes, I, 23, 1868. 
Nomen nudum. This is probably the animal named Rhizomys sivalensis by 
Lydekker, in 1878, and based on two rami of mandibles from the Siwaliks of 
Punjab. (See Mem. Geol. Surv. India, ser. x, III, art. No. 3, p. 106, 1884.) 
Typhlodon: tTv@Ads, blind; 660v=dé6ovs, tooth. 
Typhlomys Miunr-Epwarps, 1877. Glires, Muscardinidee. 
Bull. Soe. Philomathique, Paris, 6° sér., XII, for 1876, pt. 2, p. 9, 1877. 
Type: Tuphlomiys cinereus Milne-Edwards, from western Fo-kien, China. 
Typhlomys: rveAós, blind; 4àc, mouse. 
Typhloryctes FrrzivGER, 1867. Glires, Bathyergide. 
Sitzungsber. K. Akad. Wiss., Wien, Math.-Nat. Kl., LV, 1ste Abth., 502-503, 
1867. 
Species: Georychus ochraceo-cinereus Heuglin, from Bongo, central Africa; and 
Bathyergus caecutiens Lichtenstein, from the Cape of Good Hope. 
Typhloryctes: tvAos, blind; épu«Krns, digger—in allusion to the animal’s sub- 
terranean habits. 
