334 PALEOZOIC TIME. 



foot long, apart from its tail spine) is common on the Atlantic coast 



Figs. 663-667. 



Crustaceans. — Fig. 663, Acanthotelson Stimpsoni ; 664, Palaeocaris typus (X3); 665, Anthra- • 

 palsemon gracilis. Mtriapods : 666, Xylobius sigillariae ; 667, Eupboberia armigera. 



Figs. 668, 668 A 



Kg 668, Eoscorpius carbonarius; 668 A, Arthrolycosa antiqua. 



of North America, south of Cape Cod. The specimen here figured is 



