Pal/eontographical Society, 1903. 



BRITISH GRAPTOLITES. 



PLATE XVII. 



/' 



— V s 



f , 



iiri r£> 



^ 



^ *cy/* 





s 



/ 



/ 



s" 





\N 



\ ! 



-7 



,1 



■ \ 



r" 



y 



-- 



/ 



£. M. A\ Wood, ,/. 



Di rby. 



PLEUROGRAPTUS. 



