240 



PALEONTOLOGY OF ILLINOIS. 



STREPTOSPONGIA Ulrich, 1889. 

 S. labjrinthica Ulrich 



CYLINDROCCELIA Ulrich, 1889. 



C. endpceroidea Ulrich.... 



C. covingtonensis Ulrich. 



C. minnesotensis Ulrich.. 



C. minor Ulrich... 



INCERT/E SEDIS. 

 ARCH.EOCYATHUS Billings, 1862 



A. atlanticus Billings 



A. billingsi Walcott 



A? pavonoides Matthew 



AULOCOPINA Billings, 1875. 

 A. granti Billings 



EOCORYNE Matthew. 

 E. gemina Matthew 



ETHMOPHYLLUM Meek, 1868. 



E. minganense Billings, sp 



E. profundum Billings, sp 



E. rarum Ford, sp 



E. rensselaericum Ford, sp 



E. whitneyi Meek 



PATTERSONIA S. A. Miller, 1882. 

 P. difficilis S. A. Miller... 



RHABDARIA Billings, 1865. 



R. fragilis Billings.. 

 R. furcata Billings. 



