CARBONIFEROUS PERIOD. 



357 



The remains of marine species are not common in the Coal measures of Europe 

 or of Britain, while those of the American coal fields are almost all marine. 



Fi<rs 606-610. 





Fig. 606, Gampsonyx fimbriatus; 607, Bellinurus (Limulus) rotundatus (X y AY, 608, Dictyo- 

 neura anthracophila; 609, Blattina prinueva; 610, Cyclophthalnius Bucklandi. 



Fig. 610 A. 



Anthracopalaemon Salteri. 



A number of American Coal measure species are identical with 

 the tfw&carboniferous of the other continent. Thus it is with 

 the following: Athyris aubtilita, Retzia radians, Spirifer 

 lineatus, S. Urii, Productus longispina, P. scabriculus, P. cos- 

 tatus, Fusulina cylindrica. 

 1. Articulates. — (a.) Oustaceans.— No species of Trilobites are reported 

 from the foreign Coal measures, — showing, apparently, the complete extinction 



