INDEX TO PLATES. v [\ 



HALYSITES Plates. 



catenulatus 67 



s nexus 67 



NlCHOLSOXIA 



/ adnata 78 



y angulata 80 



^ canadensis 51, 73, 80 



RoMIXGERIA 



•fasciculata 75 



- incrustans 73, 74, 75, 76 



umbellifera 75, 76 



/ uva 75 



y vannula 75 



Striatopora 



s alba , 64 



huronensis 51, 64 



linnseana 64 



Syrixgopora 



bouchardi 68 



hisingeri 68, 76 



perelegans 69 



/ straminea 68, 76 



tabulata 68 



tubiporoides 49, 69 



