Natural Sciences of Philadelphia 
17 
regions to the east and north, a locality to the north, one to the 
northeast and one to the east were studied. To the northeast at 
Guymon, in the “Panhandle” of Oklahoma, a strong tincture of 
forms from the lower country to the east and in Texas was evident. 
The variety of species and abundance of individuals made Guym on 
an interesting locality, one of absolutely level plains with richer 
vegetation than in the Kansas Great Plains. Dalhart, Texas, was 
the locality to the north of the Staked Plains, and Childress, Texas, 
the one to the east. With an elevation of little more than 2000 feet 
Staked Plains at Happy Crossing, Palo Duro Canyon, 
near Amarillo, Texas. 
the latter locality showed but a weak plains element, with a strongly 
indicated central Texas influence. After the high plains Childress 
was quite hot, while its human inhabitants showed a similar relation- 
ship to that of the fauna, i. e. central Texan and not Great Plains. 
The Staked Plains of Texas and eastern New Mexico next occu- 
pied our attention, using the term for the area east of the Pecos and 
south of the Canadian Rivers, as generally restricted. The surface 
of the Staked Plains is monotonously level with no true trees except 
where planted, and shrubby growth, such as mesquite, in relatively 
few areas. There is little surface running water, but the few 
streams which penetrate or rise in this region have carved deep 
and broad gashes in the limestone surface of the Plains. One 
