90 



AMERICAN FOSSIL BRYOZOA. 



Lists of species — Continued. 

 SILURIAN— Continued. 



[BULL. i7:i 



Polypora lilasa Hall 



obliqua ( Hall ) 



paxillata ( Hall ) 



punctostriata ( Hall ) 



? stricta (Hall and Simpson) 



tantula ( Hall ) 



varia ( Hall ) 



Ptilodictya angusta (Hall) 



expansa Hall 



expansa-eniarcescens Foerste . 



gladiola Billings 



nebulosa ( Hall ) 



obliqua Ringueberg 



sulcata Bining.s 



? tenera (Billings) 



whitfieldi Foerste 



Ptiloporella nervata (Nicholson) 



Rhinopora ? tuberculosa Hall 



? tubulosa Hall 



verrucosa Hall 



Sceptropora fustiformis Ulrich 



Semicoscinium acmeum (Hall ) 



?cleis (Hall).... 



coronis (Hall ) 



tenuiceps ( Hall ) 



thyene (Hall) 



Stictopora ?? granatula Hall 



?? obsoleta Hall and Simpson. . 



?? papulosa Hall 



Stictotrypa orbipora (Hall) 



punctipora ( Hall ) 



similis (Hall) 



Stomatopora parva Ringueberg 



recta Ringueberg 



Thamniscus dichotomus (Hall) 



fruticellus Hall 



nysa Hall 



variolatus Hall 



Trematopora halli Ulrich 



?? punctata Hall 



Anticosti. 



X 



X 

 X 



Clintdii. 



X 

 X 



X 



X 



X 

 X 

 X 



Niagara. 



X 



X 



X 



X 

 X 



X 



X 



X 

 X 

 X 

 X 

 X 

 X 



X 

 X 



