108 



AMERICAN FOSSIL BRYOZOA. 



[bull. 173. 



Lists of species — Continued. 

 MISSISSIPPIAN— Continued. 



CARBONIFEROUS. 



Acanthocladia fruticosa Ulrich 



Chainodietyon laxum Foerste 



laxum-minor Ulrich . 



Coscinium dictyotum (Meek) 



Cystodictya carbonaria ( Meek ) 



? concentrica (Prout) .. 



Diploporaria biserialis Ulrich 



Fenestella conradi Ulrich 



corticata Prout 



delicatula Ulrich 



in?equalis Ulrich , 



intermedia Prout 



limbata Foerste 



lyelli Dawson 



mimica Ulrich 



modesta Ulrich , 



norwoodiana Prout 



perelegans Meek 



perminuta Ulrich 



popeana Prout 



remota Foerste 



sevillensis Ulrich , 



shumardi Prout 



subretiformis Prout 



trituberculata Prout 



variabilis Prout 



wortheni ITlrich 



Coal 

 Measures. 



X 

 X 

 X 



X 



X 

 X 



X 

 X 



X 



X 

 X 



X 



X 



X 



X 



X 



Permian. 



X 



