INDEX TO GENERA AND SPECIES DESCRIBED. 



PROTISTA. 



PLATES. 



Brachiospongia 



digitata 35, 36 



BRYOZOA. 

 Ptilodictya 



hilli 35 



BRACHIOPODA, 

 Ambocoelia 



umbonata __ 17 



. .nastrophia 



internascens 32 



Athyris 



vittata. --- - 16 



Atrypa 



aspera 14 



calvini - - - 32 



ellipsoida - 



reticularis. - 14, 15 



reticularis, var. niagarensis 32 



Camarella 



congesta - - - 



Centronella 



glans-fagea - 31 



Ghonetes 



acutiradiata 18 



subquadrata - - -- 



yandelliana 17, 31 



Crania 



bordeni --- , ..- 2 



