INDEX TO PLATES. yjj 



HaLYSITES Plates. 



catenulatus 67 



nexus 67 



NiCHOLSONIA 



adnata 78 



angulata 80 



canadensis 51, 73, 80 



ROMIXGERIA 



fasciculata 75 



incrustans 73, 74, 75, 76 



umbellifera 75, 76 



uva 75 



vannula 75 



Striatopora 



alba 64 



huronensis 51, 64 



linnseana 64 



Syringopora 



bouchardi 68 



hisingeri 68, 76 



pcrelegans 69 



straminca 68, 76 



talndata 68 



tubiporoides 49, 69 



