333—156 INDIAN TERTIARY AND POST-TERTIARY VERTEBRATA. 
In space the genus had a very wide distribution, being found all through America, 
in a great part of Europe, and northern India. 
The following list comprizes the best known species (exclusive of the Indian), 
with their more important synonomy : — 
1. Macelerodus cultridens 1 (Cuv.) Up. miocene to up. pliocene, Europe. 
Agnotherium antiquum, Kaup {in parte). 
Cultridens arvernensis, Cr. 
Drepanodon aphanista , 2 Cope. 
Felis aphanista, Kaup. 
,, cultridens, Brav. 
,, gigantea, Wag. 
Machcerodus leoninus, Roth, and Wag. 
Meganthei'eon aphanista, Pom. 
,, cultridens, Pom. 
Steneodon cultridens, Croiz. 
Ursus cultridens, Cuv. 
arvernensis, Cr. and Job. 
Ursus drepanodon, Nesti. 
A large species about the size of the jaguar : pm. 3 large, with two fangs : canine stout : 
descending symphysial expansion comparatively small : anterior lobe of pm 4 with a 
small talon. 
2. Machcerodus fatalis 3 (Leidy). Pliocene, N. America. 
Trucifelis fatalis, Leidy. Smilodon fatalis , Cope. 
A very large imperfectly known species, allied to M. necator-, the anterior lobe of pm. 4 
, is double. 
3. Machcerodus gracilis (Cope). 4 Pliocene, N. America. 
Smilodon gracilis, Cope. 
A smaller species than the last, only known by the canine, which is remarkable for its 
great basal compression. 
4. Macelerodus insignis, Filh. 5 Quercy phosphorites. 
A large species only known by fragments of the canine. 
5. Machcerodus latidens, Owen. 6 Pliocene and low. pleistocene, Europe. 
Drepanodon latidens, Cope. Megantkereon latidens, Pom. 
A large species, of which the canines, as compared with those of Ml cultridens, are 
“ thinner or more compressed in proportion to their breadth, especially at the 
anterior part of the crown, which is sharper.” 
6. Machcerodus meganthereon 7 (Cr. and Job). Pliocene) Europe. 
Drepanodon meganthereon, Cope. Meganthereon brevidens, Pom. 
Felis meganthereon, Cr. and Brav. „ macrocelis, Pom. 
Steneodon meganthereon, Cr. 
A species of the size of the leopard, with the dentition of the type of that of M. 
cultridetis (of which it is regarded by Gervais 8 as a smaller race). The descending 
symphysial expansion is more developed, and extends farther back. 
1 Gaudry, “ Animaux Fossiles et Geologie de l’Attique,” p. 105. Wagner, ‘ Abhand. bayer Akad ,’ vol VII., pi. IX. 
2 Regarded by Prof. Cope as distinct : the synonomy here given is that of Prof. Gaudry. 
3 Cope, ‘ Amer. Nat.,’ vol. XIV., p. 857. 4 Ibid. 5 “ Phosphorites du Quercy,” p. 152. 
6 “British Fossil Mammals and Birds,” p. 179. Falconer (“Pal. Mem.,” vol. II., p. 459) doubted the specific 
distinctness of this form from M. cultridens. 
7 Gaudry, “ Les Enchainements du Monde Animal— Mam. Tert.,” p. 221, fig. 293. Gervais, “Zool. et Pal. Fran 5 .,” 
pi. 27, figs. 1, 2 (M. cultridens). 
8 “ Zool. et Pal. Franc;.,” p. 231. 
