MAMMALIA. 



19 



FAMILY CAMELID-ffi. 



No. 28. [56] Poebrotherium. "Wilsonii, Leidy. 



Skull and Lower Jaw (cast). This specimen belonged to an individual 

 just reaching adult age, of a species which was the earliest progenitor of the 

 camel tribe. The ramus of the lower jaw is remarkable for its breadth and 

 for the angular apophj'sis as in the Camel, C'arnivores and most Rodents. The 

 Pcebrotlierium had all the incisors and premolars of the primitive ungulate. 

 The original was discovered in 1847, in the Mauvaises Terres (Miocene or 

 White River Group), Nebraska, and is preserved in the Academy of Natural 

 Sciences, Philadelphia. 



FAMILY CERVID^. 



No. 29 and 30. Tarandus Rangifer (Reindeer), 



Teeth and Poktions of Leg Bones. This member of the Deer family, 

 now existing in Arctic Regions, is found fossil in the Post-Tertiary of England 

 and Europe, as far south as Southern France, and associated with Palaeolithic 

 man. The association is so intimate and the fossils so abundant that the term 

 " Reindeer Period " has been applied by the European geologists to the por- 

 tion of time represented by the deposits. These specimens are from a cave in 

 La Dordogne, France. 



FAMILY SUID^. 



The Suilline type, the most generalized of the Artiodactyla, and 

 with bunodont dentition, began in America with Eohyus, in lower 

 Eocene, and has been abundant ever since, being now represented 

 by the Peccaries. The true Hogs, as Stis, Porcus and Phacochmms, 

 have not been found in America ; nor the allied HippoiKitamus. 



No. 31. [63] Sus scrofa, Meyer. 



Skull (cast). The fossil remains of 

 the true Hogs appear for the first time 

 in beds of Middle Tertiary (Miocene) 

 age, in the Valley of the Rhine. The 

 fresh water beds (Pliocene) of Auvergne, 

 and the bone caverns and peat bogs of a 

 later date, in France and England, have 

 furnished specimens very similar to or 

 quite identical with the modern Hog. This species was cotemporary with the 

 Mammoth, and cannot be distinguished from the Wild Boar. The fossil was 

 found in a cave at St. Didier, France, and is now in the Museum of Natural 

 History in Lyons. Size, 16 x ?. 



