160 



UNGULATA 



ORDER VII 



Subfamily 1. Palaeosyopinae Osborn. 



All premolars less complex than molars. Three [rarely two) conical incisors in 

 each ramus of the jaw. Canines large. Eocene ; North America and Europe. 



Fig. 216. 

 Pateos2/02;s jMtZiwfostts Leidy. Eocene of North America. Restoration of skeleton, i/jg. (After Barle.) 



Lamhdotherium Cope. Extremities slender. Lower Eocene ; Wyoming. 

 This genus connects the Titanotheriidae with the other perissodactyls. 



Palaeosyops Leidy 

 (Limnohyus Marsh). 

 (Figs. 215, 216). Dental 



formula: ' ' '„' • Ca- 

 3.1.4.3. 



nines long and pointed. 

 Superior premolars trigo- 

 nodont. Manus tetra- 

 dactyl; pes tridactyl. 

 Abundant in the Wind 

 Eiver and Bridger forma- 

 tions (Eocene) of North 

 America. P. major, 

 paludosus Leidy, etc.; 

 one species, also, in the 

 Uinta beds. 



Limnohyops Marsh. 

 Fio. 217. Eocene. L. laticeps Marsh. 



TelviaUuriuiti ctyrnutum Osborn. Upper Eocene (Uinta beds), ManteOCeraS Osborn. 

 Wyoming. Skull in lateral and superior aspects. H, rudiment of nasal m ■, ,i • ht i. 



horn-core ; c, canine tooth. Vs- (After Osborn.) lelmathenum MarSD 



(Fig. 217). Skull flat; 

 nasal bones long, with bony protuberances on the naso-frontal border. Upper 



