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. 



Fijs. 606-610. 



Fig. 606, Ganipsonyx fimbriatus; 607, Bellinurus (Limulus) rotundatus (X K); 608, Dictyo- 

 neura anthracophila ; 609, Blattina primasva; 610, Cyclophthalmus Bucklandi. 



Fig. 610 A. 



Anthracopalaemon Salteri. 



A number of American Coal measure species are identical with 

 the ^u&carboniferous of the other continent. Thus it is with 

 the following : Athyris subtilita, JRetzia radians, Spirifer 

 Uneatu8, S. Urii, Productus longispinus, P.scabriculus, P. coa- 

 tatii8, Fusulina cylindrica. 

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

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



