HICKORY ASSOCIATION 



2 37 



Circinaria concava [Fig. 223]) are usually common and Polygyra albolabris 

 is characteristic of the more mesophytic parts. 



The ruffed grouse, oven-bird, and woodcock nest on the ground. 

 The timber rattlesnake (Crotalus durissus Harlan) formerly occurred 

 in rocky situations (22). The four-toed salamander (Hemidactylium 

 scutatum Schl.) is found locally (22). The white-footed wood-mouse 

 (Peromyscus leucopus noveboracensis Fisch.) builds a nest under fallen 



218 



219 



222 



INHABITANTS OF A MESOPHYTIC FOREST 



FIG. 216. The wingless wood locustid (Centhophilns) ; enlarged. 

 FIG. 217. The common millipede (Spirobolus marginatus); natural size. 

 FIG. 218. Another millipede (Fomaria corrugate); natural size. 

 FIGS. 219-223. Snails from the woods. 219, Polygyra pennsyhanica Green; 

 220, Polygyra profunda Say; 221, Pyramidula solitaria; 222, Pyramidula alternata; 

 223, Circinaria concava. 



. 



logs and stumps (21). The gray fox (Urocyon cinereoargenteus Mull.) is 

 more dependent upon heavy.timber than the red fox (21). The cotton- 

 tail (21), which belongs to forest edge, frequently winters in the woods. 

 The bear was formerly common, nesting under fallen trees and feed- 



