TRIMENODON-—TRIPRIODON. 693 
Trimenodon-— Continued. 
Type: Lophiodon tapirotherium Blainville (=L. tapiroides Cuvier? from the 
Eocene of Buchsweiler, Alsace, Germany ). 
Extinct. 
Trimenodon: rpi-, three; vn, crescent; 06@v=ddo0vs, tooth—in allusion to 
the three crescents of the molars. 
Trimerodus Corr, 1873. Ungulata, Artiodactyla, Agriochceridee. 
Paleont. Bull., No. 16, p. 8, Aug. 20, 1873; ‘‘Syn. New Vert. Tert. Col., 14, 
2879.2 
Type: Trimerodus cedrensis Cope, from the Oligocene of Colorado. 
Extinct. 
Trimerodus: tpiepns, three-parted, threefold; dd0vs, tooth. 
Trimerostephanos AmEGHINO, 1895. Ungulata, Ancylopoda, Isotemnide. 
Bol. Inst. Geog. Argentino, XV, cuad. 11-12, p. 646, 1895 (sep. p. 46) 
Type: Trimerostephanos scabrus Ameghino, from the Pyrotherium beds in the 
interior of Patagonia. 
Extinct. Based ona fragment of the right mandibular ramus with the last molar. 
Trimerostephanos: rpuutp15s, three-parted; óréoavos, crown—in allusion to the 
last lower molar. 
Trimylus RocEn, 1885. Insectivora, Soricidee. 
Bericht Naturhist. Ver. Augsburg, XXVIII, 106-107, Taf. 11, figs. 4-7, 1885. 
Type: Trimylus schlosseri Roger, from the Miocene ‘der Reischenau (Zusamthal in 
Schwaben), near Breitenbronn and Kutzenhausen, Germany. 
Extinct. Based on a left lower jaw. 
Trimylus: rpi-, three; “UAy, molar—in allusion to the three lower molars, in 
contrast with two in Dimylus. 
Trinodontomys (subgenus of Sitomys) RHoaAps, 1894.  Glires, Murid:e, Cricetine. 
Proc. Acad. Nat. Sci. Phila., Oct., 1894, 256-257 (provisional name). 
Type: Sitomys insolatus Rhoads, from Oro Grande, Mohave Desert, San Bernardino 
County, California. 
Trinodontomys: tpi-[n], three; dd0v5, dd0vros, tooth; wis, mouse—from the 
trefoil character of the first upper molar. 
Triodon AmEGHINO, 1875. Fere, Mustelid:ze. 
Journ. de Zoologie, Paris, IV, No. 6, p. 528, 1875. 
Type: Conepatus mercedensis Gervais & Ameghino, from the Rio Frias, near Mer- 
cedes, Province of Buenos Aires, Argentina. 
Name preoccupied by Triodon Cuvier, 1829, a genus of Pisces. 
Extinct. Based on ‘un cráneo casi intacto. 
Triodon: rpi-, three; ó8dGv-—ó8007vs, tooth. 
Triplopus Corr, 1880. Ungulata, Perissodactyla, Hyracodontide. 
Am. Naturalist, XIV, for May, 382-383, Apr. 27, 1880; Proc. Am. Philos. 
Soc., XIX, 382, 1881; Tert. Vert., 678, 1885 (date of publication); OsBorn, 
Trans. Am. Philos. Soc., new ser., XVI, pt. 111, 524-529, pl. xr figs. 6-10, Aug. 
20, 1889. 
Type: T'iplopus cubitalis Cope, from the Eocene of the Washakie Basin, south- 
western Wyoming. 
Extinct. Based on ‘the anterior part of the skeleton. 
Triplopus: rpirAoos, triple, threefold; movs, foot—in allusion to the fore feet, 
which have only three digits. 
Tripriodon Marsu, 1889. Allotheria, Plagiaulacid:e. 
Am. Journ. Sci. & Arts, 3d ser., XX XVIII, 86, pl. r1 figs. 19-21, July, 1889. 
Type: T'ripriodon celatus Marsh, from the Cretaceous (Laramie) of Wyoming. 
Extinct. 
Tripriodon: rpi-, three; mpiwv, saw; 66@v=ddo0vs, tooth—in allusion to the 
three rows of elevations of the upper molars. 
