SUBORDER C 



PERISSODACTYLA 



149 



bent V-shaped ridges, the inner horns of which, with the exception of the 

 anterior one, rise into pointed cones. Inferior third molar with crescentic 

 talonid. Middle Eocene, France; and Bohnerz, Switzerland. P. prevosti 

 Gervais. 



Fio. 197. 



Propalaeotlierium argentonicum Gervais. Middle 

 Eocene, Argenton, Indre. Two last lower molars, 

 i/i. (After Filhol.) 



Fig. 19S. 



PropalaeotTierium isselanum Gervais. 

 Upper Eocene (Bohnerz), Egerkingen, 

 Switzerland. Upper first molar and 

 two last premolars, i/i. (After Riiti- 

 meyer.) 



LopUotherium Gervais. Upper premolars molariform, sexi-tubercular 

 with small parastyle and mesostyle on the ectoloph ; cusps conical. Lower 

 premolars and molars with angular crescents. Upper Eocene ; France and 

 Switzerland. L. cervulum Gervais. 



Propalaeotlierium Gervais (Figs. 197, 198). Superior molars as in 

 Pachynolophus. Third and fourth premolars tritubercular, with robust 

 V-shaped internal cone. Inferior cheek teeth consisting of two V-shaped 

 ridges opening toward the inside ; 

 2 _ the anterior crescent of the first 



lobe is frequently absent. The 

 two internal cusps rounded, the 

 anterior bilobed. Third molar 

 with well-developed talonid. Pre- 

 molars less complex than the 

 molars. Middle Eocene ; France. 

 P. argentonicum Gervais. Also 

 Bohnerz ; Egerkingen. P. issela- 

 num Cuvier and P. parvulum 

 Laurillard. 



Epihippus Marsh. P^ and P^ 

 molariform. Manus tetradactyl, 

 third metacarpal enlarged. Upper 

 Eocene (Uinta beds) ; Wyoming. 

 E. gracilis Marsh. 



Fig. 200. 



Fig. 199. 



AncMlophus desrnaresti Gervais. 



A, Upper cheek teeth from Middle 

 Eocene (Calcaire Grossier), Paris. 



B, Lower teeth from Upper 

 Eocene (Bohnerz), Egerkingen, 

 Switzerland, i/i. (After Kowal- 

 evsky.) 



A, Anchilophus des- 

 rnaresti Gervais. Upper 

 Eocene (Phosphorites), 

 Quercy. Worn upper 

 molar. 4/3. B, Anchi- 

 lophus radegondensis 



Anchilophus Gervais (Figs. 199, fBXerz),''&frnt! 



With the exception of the Switzerland. 

 J- molar, l/i. 



molar, i/j. 



Upper 



200). 



small first lower premolar and P^ 

 cheek teeth are homoeodont. Diastema between the canine and first premolar 

 long. Upper molars broader than long. Inferior premolars and molars 

 composed of two V-shaped crescents, which meet in a thick bicuspidate 

 internal pillar. Third molar with talonid. Upper Eocene Lignite ; Debruge. 

 Phosphorites and Bohnerz. A. desrnaresti Gervais. 



Paloplotherium Owen (Plagiolophus Pomel) (Fig. 201). Premolars less 

 complex than molars, first premolar usually absent. Upper molars longer 

 than broad. Crowns of the teeth often covered with cement. Extremities 



