PALEOZOIC ROCKS AND ERA. 



317 



man in connection with land vegetation, as might be ex- 

 pected, are much more abundant and in greater variety in 



I LURIAN 



PALEOZOIC] N E O Z O I C 



FIG. 244. Dawsonella Meekii. 

 (After Bradley.) 



FIG. 245. Anthracopupa Ohioensis. 

 (After Wbitfield.) 



FIG. 246. Carboniferous 

 goniatites : Goniatites 

 crenistria (European) ; a, 

 side-view ; &, end-view. 



Fia. 247. Carboniferous crustacean : Eu- 

 proOps Danae. (After Meek and Worthen.) 



the coal-measures. There are spiders, scorpions, centipeds, 

 cockroaches, dragon-flies, and beetles (Figs. 249, 250). It 

 is well to observe that the highest orders of insects, 



