SALTEB BRITISH NORTH AMERICAN CRUSTACEA. 



79 



Figs. 1-12. — Fossils from British North America. 

 Coal-measures. 



Devonian. 



11a 



Fig. 1. Aathracomya elongata. 



2. Naiad lies Ice vis. 



3. Anthracoptera carbonaria. 



4. Eurypterus, tail of: nat. size, 

 o. Eurypterus, sp. 



6. Diplostylus Dawsoni. 



Fig. 7. Spharoma. 1 ~ ,, . 



8. Squilla. } Outlines. 



9, 10. Eurypterus pulicaris. 



1 1 . Amphipeltis paradoxus. 



12. Tail-piece of Typhis (recent). 



