Reed,Girvan Trilobites. 



PAL/EONTOGRAPHICAL SOCIETY, 1906. 



PLATE XVIII. 



M 



*2e 



% 



A^lik^ 12 



15 



G M.WoodwarddeJ.etlibh. 



(mW'M 



14 



S 



13 



CALYMENE, CHEIRURUS. 





