TRIGLYPHUS——TRIGONOLOPHODON. 691 
Triglyphus—Continued. 
Type from the upper Trias near Stuttgart, Württemberg, Germany. (‘‘ Der 
Fundort ist die Schlósslesmuhle auf den Fildern, 2 Stunden südlich von Stutt- 
gart.") The species was not mentioned in the original description, but was 
afterwards named Trritylodon fraasi by Lydekker (Cat. Foss. Mamm. Brit. 
Mus., pt. v, 201, 1887). 
Name preoccupied by Triglyphus Loew, 1840, a genus of Diptera. 
Extinct. Based on a single upper molar. ‘‘ Ungliicklicherweise existirt das 
Original jetzt nicht mehr. Nachdem es gezeichnet war verschwand das Uni- 
cum auf ganz unerklürliche Weise." (FRAAs. ) 
Triglyphus: rpi-, three; y Avo»), carving, groove 
a Greek triglyph. 
Trigodon AMEGHINO, 1887. Ungulata, Toxodontia, Toxodontide. 
** Cat. de la Prov. de Buenos Aires en la Exp. Cont. Sud-Amer., 1882 (nomen 
nudum);" Apuntes prelim. sobre Mamíf. Esting. del Monte Hermoso, pp. 8-9, 
lam. r, 1887; Cont. Conocimiento Mamíf. Fósil. Repüb. Argentina, in Act. 
Acad. Nac. Cien. Córdoba, VI, 399-401, 916, pl. xvri fig. 6, 1889. 
Trigonodon AMEGHINO, Revista Argentina Hist. Nat., Buenos Aires, I, entr. 4a, 
240, Aug. 1, 1891 (preoccupied ). 
Type. T'rigodon gaudryi Ameghino, from Monte Hermoso, about 40 miles east of 
Bahia Bianca, Province of Buenos Aires, Argentina. 
Extinct. Based on a lower jaw with the dentition complete. 
Triglon]odon: rpíy vos, triangular; 66@v=0do0vs, tooth—in allusion to the 
triangular form of the second and third lower incisors. 
Trigonias Lucas, 1900... Ungulata, Perissodactyla, Rhinocerotide. 
Proc. U. S. Nat. Mus., XXIII, No..1207, pp. 221—223, figs. 1-2, Oct. 9, 1900. 
Type: Trigonias osborni Lucas, from the Oligocene (lower Titanotherium beds) 
of South Dakota. 
Extinct. Based on the anterior part of the palatal portion of the cranium with 
teeth, and the left ramus of a jaw including the entire symphysial portion. 
Trigonias: rpiy vos, triangular; + suffix -z«c, denoting possession—‘‘in refer- 
ence to the triangular shape of the cutting portion of the procumbent tooth.”’ 
Trigonodon AmeEcuino, 1891. Ungulata, Toxodontia, Toxodontid:e. 
Revista Argentina Hist. Nat., Buenos Aires, I, entr. 4a, 240, Aug. 1, 1891. 
Emendation of Trigodon Ameghino, 1887. The form Trigonodon is preoccupied 
by Trigonodon Sismonda, 1849, a genus of Pisces; and by Trigonodon Conrad, 
1852, a genus of Mollusca. Replaced by Eutrigonodon Ameghino, 1891. 
Extinct. 
Trigonodon: tpiywvos, triangular; 60@v=ddo0vs, tooth—in allusion to the 
second and third lower incisors. 
Trigonolestes Corr, 1894. Ungulata, Artiodactyla, Pantolestid:e. 
Am. Naturalist, X X VIII, No. 334, p. 868, Oct. 10, 1894; MarruEw, Bull. Am. 
Mus. Nat. Hist., N. Y., XII, 34, 1899. 
Type: Mioclenus brachystomus Cope, from the Eocene (Wasatch) of the Big Horn 
Basin, Wyoming. 
Extinct. 
Trigonolestes: rpiy @vos, triangular; -+- (Panto-)lestes—in allusion to the trituber- 
cular upper molars. 
Trigonolophodon Rorn, 1903. Ungulata, Aneylopoda, Homalodontotheriide. 
Revista Mus. La Plata, XI, 146-148, 1905. 
Species, 3: Trigonolophodon inflatus Roth, and T. elegans Roth, from the lower 
Tertiary of Canadon Blanco; and T. modicus Roth, from the upper ‘Cretaceous’ 
of Lago Musters, all from the Territory of Chubut, Patagonia. 
Extinct. 
Trigonolophodon: tpiywvos, triangular; Ad@os, crest; d5@v=ddo0vs, tooth. 

the grooved tooth resembling 
