396 



PALAEOZOIC SYSTEM OF ROCKS. 



Fig. 557. 



Fig. 558. 



Fig. 559. 



Figs. 555-559. — Carboniferous Crustaceans: 555. Eupro6ps Danas (after Meek and Worthen). 

 556. Phillipsia Lodiensis (after Meek). 557. Acanthotelson Stimpsoni restored (after Packard). 

 558. Palseocarus typus (after Meek and Worthen). 559. Anthrapalaemon gracilis (after Meek 

 and Worthen). 



be compared with figures of Trilobites and Limulus previously given. 

 As already seen (p. 325), the same view is confirmed by embryology. 



Fig. 560.— o, Palaeoniscus aculeatus (after Nieskowski) : a Enrypterid from Upper Silurian, b, Ne- 

 oliinulus falcatus (after Woodward): a Limuloid from Upper Silurian. 



