699 INDEX GENERUM MAMMALIUM. 
Trigonostylops Amrcuino, 1897. Ungulata, Amblypoda (Trigonostylopide). 
[La Argentina al través de las Ultimas Epoc as Geol., 16, 1897—nomen nudum. ] ° 
sol. Inst. Geog. Argentino, XVIII, 492-495, fig. 72, ee 6, 1897. 
Type. Trigonostylops wortmani Ameghino, from the ‘Cretaceous’ of Patagonia. 
Extinct. 
Trigonostylops: Tpeis, three; ywvia, angle; 6rvAos, pillar; ov, aspect. 
Triisodon Corr, 1881. : Creodonta, Triisodontid:e. 
Paleont. Bull., No. 33, p. 485, 1881; Am. Naturalist, XV, for Aug., 667—669, 
July 27, 1881; Proc. Am. Philos. Soc., XIX, 485-486, Oct. 21, 1881. 
Triisodon Corr, Tert. Vert., 270-277, 1885 (date of publication. ) 
Type: Triisodon quivirensis Cope, from the Puerco Eocene of New Mexico. 
Extinct. Based on ‘the lower jaw.’ 
Triisodon: rpi-, three; i60s, equal; óócv = óóovs, tooth—in allusion to the 
‘three similar true molars.’ 
Trilatitus Gray, 1842. Chiroptera, Vespertilionide. 
Ann. & Mag. Nat. Hist., X, 258, Dec., 1842; List. Spec. Mamm. Brit. Mus., p». 
xix, 26, 1843. 
Tralatitus GERVAIS, Dict. Univ. Hist. Nat., XIII, 213, 1849. 
Tralatitius Gray, Ann. & Mag. Nat. HO 3d ser., XVII, 90, Feb., 1866. 
Species: Vespertilio hasseltii Temminck, from the ‘district sauvage de Bantam,’ 
Java; V. macellus Temminck, from Borneo; Trilatitus blepotis Gray, from India; 
‘and other Asiatic species.’ 
Trilatitus: Lat. tralatitius, usual, common. The original specific name of Trilatitus 
horsfieldii (= Vespertilio tralatitius), which was probably included in the genus 
by Gray under the term ‘other Asiatic species,’ but not mentioned by name 
until 1848. 
Trilobodon Rorn, 1901. Ingulata, Ancylopoda ( Trilobodontid:e). 
Revista Mus. La Plata, X, 253, Oct., 1901 (sep. p. 5). 
Type: Trilobodon brancoi Roth, noh the upper ‘Cretaceous’ of Cafiadon Colo- 
rado, Territory of Chubut, Patagonia. 
Extinct. 
Trilobodon: rpi-, three, Aofjóc, lobe; 0d6@v = d6o0vs, tooth—in allusion to the 
upper incisors, which are divided into three ridges by two deep grooves. 
Trilodon (see Tribodon). Glires, Octodontide. 
Trilophodon (subg. of Mastodon) FALcoxNER & CavrLEY, 1846. 
Ungulata, Elephantidee. 
Fauna Antiqua Sivalensis, 54, 1846; FArcoxER, Quart. Journ. Geol. Soc. London, 
XIII, pt. 4, pp. 312-314, 316-317, synop. table, pl. xr figs. 3-4, Nov. 1,1857. 
Falconer, in 1857, included 7 species from the upper Miocene and Pliocene: 
Mastodon angustidens Cuvier, from France; M. ohioticus (Blumenbach), from 
North America; M. humboldtii Cuvier, from South America; M. tapiroides 
Cuvier, from France; M. borsoni Hays, from Piedmont, Italy; M. pandionis 
Falconer, from HIA India; and M. pyrenaicus (Lartet MS.), from France. 
Extinct. 
Trilophodon: rpi-, three; Ad@os, ridge, crest; 65@v = óóovs, tooth—from the 
three transverse crests on the third premolar and the first and second molars. 
Trilophomys Dzr£nET, 1892. Glires, Murid:», Murin:e. 
Mém. Soe. au de France, Paléont., III, fasc. 1, Mém. No. 3; pp. 121-122, pl. XII, 
figs. 2, 3, 1892. 
New name Em Lophiomys Depéret, 1890, which is preoccupied by Lophiomys Milne- 
Edwards, 1867, a genus of Lophiomyid:e. 
Extinct. 
Trilophomys: rpi-, three; Ad@os, crest; 4 Oc, mouse. 
Trimenodon (irLocrn, 1841. Ungulata, Perissodactyla, Lophiodontid:e. 
Hand- u. Hilfsbuch E ME I, pp. xxxii, 124, 1841; Tuomas, Ann. & Mag. 
Nat. Hist., Gth ser., XV, 191, Feb. 1, 1895. 
