58 INDEX GENERUM MAMMALIUM. 
Syodon— Continued. 
Type: Syodon biarmicum. Agassiz refers this genus to the Pachydermata, but in 
Bronn's Index, p. 625, it is given as a synonym of Lamnodus hastatus (a fish), 
while on p. 1212 is added the remark, ‘‘e piscium rudimentis compositum 
fide Ag." 
Extinct. 
Syodon: 60s, Gvds hog; 66@v =ddo0Vvs, tooth. 
Syotherium (‘Owen’) Meyer, 1848. ^ Ungulata, Perissodactyla, Equidee. 
Meyer, in Bronn’s Index Paleont., Handb. Geschichte Natur, III, 603, 1848 
(under Hyracotherium); 1V, 1212, 1848. 
“Syotherium Ow.= Hyracotherium Ow." (Meyer,) ‘‘Said to be in the Athe- 
nzeum (London), about 1840, but I have never been able to find it . . . 
I take it to be a misprint somewhere for Hyotherium. | Syotherium can not exist 
as a classical word." (SHERBORN, in epist., June 28, 1897.) 
Extinct. 
Syotherium: 60s, Gvós, hog; 07ptov, wild beast. 
Syphomia HRarixEsqUE, 1815. Monotremata, Tachyglossidze. . 
Analyse de la Nature, 57, 1815. 
New name for Echidna Cuvier, 1798. In the addendum, p. 219, occurs the note, 
35531 
** Effacez—Syphomia R. í 
Syspotamus BirrpERnG, 1828. Ungulata, Perissodactyla, Tapiridee. 
Syn. Faunae Scandinaviae, I, Mamm., Conspectus A (before p. 1), 1828. 
New name for Tapir Gmelin, 1788 (= Tapirus Brisson, 1762). 
Syspotanus: 60s, hog; zÓrauoe, viver—i. e., a river hog. 
Systemodon Corr, 1881. Ungulata, Perissodactyla, Tapirid:e. 
Am. Naturalist, XV, for Dec., 1018, Nov. 29, 1881; ''Palzont. Bull., No. 34, p. 
183, 1881.” 
Type: Hyracotherium tapirinum Cope, from the Eocene of New Mexico. 
Extinct. 
Systemodon: GÓGryua, a union of several parts; 000v —080vs,tooth—in allusion 
to the superior dentition which is uninterrupted from the canine inclusive, in 
contrast with that of Hyracotherium which has one or two diastemata. 
A Be 
Tachyglossus IruiaEgR, 1811. Monotremata, Tachyglossus. 
Prodromus Syst. Mamm. et Avium, 114, 1811; THomas, Cat. Marsup. & Mono- 
trem. Brit. Mus., 377, 1888 (type fixed). 
Species: Myrmecophaga aculeata Shaw (type), and Echidna setosa Cuvier, from 
Australia. - 
Tachyglossus: Tayvs, swift; y AG66a, tongue—in allusion to the movement of the 
slender, extensible tongue in gathering ants and similar food. 
Tachymys (see Taxymys). Glires, Ischyromyide. 
Tachynices Brookes, 1828. Cete, Delphinidee. 
“Oat. Anat. & Zool. Museum of Joshua Brookes, London, 40, 1828 (previous to 
July 14)" (sale catalogue); Gray, Cat. Seals & Whales Brit. Mus., 311, 1866 
(synonym of Monodon). 
Type: Tuchynices megacephalus Brookes (=Monodon monoceros Linnsus), from 
the Arctic Ocean. 
Tachynices: rayos, swift; viKyets, conquering—in allusion to the habits and 
formidable aspect of the male. 
