﻿Paueontograph l Soc 



DEVONIAN CRUSTACEA 



II, II 





■ ieluhlh 



Fiq.l. PTERYGOTUS ANGLICUS Aj". 



nat.siM h H ''■ Thoracic segment of PTERYCOTUSy«wo thirds nalsiit). 



. 



f0 rFAB SHIRE. 



