1 6 Departtnent of Vertebrate Falceoniology, 



gracefully proportioned, the skull remarkably specialized in 



the male. 



Price, $5. 



Scott, Osteology and Relations of Protoceras, Jotir. Morph., Vol. XL 

 OsBORX & WoRTMAN, Characters of Protoceras, etc. Bull. Anier. 

 Mus. Nat. Hist., IV, 1892, pp. 351-372. 



34. Type Specimens of Fossil Equidae. 



Price. 



Equus coniplicaius heidy. Upper molar. Pleistocene $2.00 



" excelsus Leidy. Upper jaw. " 4.00 



" occidentalis Leidj'. Upper molars. " 2.00 



" pectinatus Cope. Upper teeth, series. " 3.00 



Hipparion speciosum heidy. Upper teeth. Miocene j?.oo 



" afflne Leidy. " " 3.00 



" occidentale Leidy " " j-oo 



" gratum Leidy " " 2.J0 



" niontezunicB Leidy. Upper and lower tooth. Mio- 

 cene 2.00 



Merychippus inirabilis Leidy. Upper jaw. Miocene 3.00 



" insignis Leidy. " " 3-00 



Parahippus cognatus Leidy. Upper teeth, " 2.j0 



Parahippus {Desmatippus) crenidens Scott. Upper and lower 



jaws. Miocene ; 6.00 



Anchippus texanus Leidy. Upper molar. Miocene i.^o 



Hypohippus affinis Leidy. " " i-S^ 



Hypohippus {Anchitherium) equinus. Upper and lower jaws. 



Miocene 6.00 



Mesohippus hairdi Leidy. Figtired skull and jaws. Leidy, 



1869, pi. XX. Oligocene 5-00 



The patterns of the molars in the above type specimens 

 have been copied with especial care and accuracy on the 

 casts. 



35. Phenacodus primaevus Cope. 

 Fore and Hind Feet. 



Wasatch Formation, Lower Eocene, Wyoming. 



The mounted skeleton of Phenacodus in the Cope Collection 

 (now in the American Museum) is well known by descriptions 



