List ok Gknkua and SpKcres. 



Ui) 



P. baculum, Hall (sp.). 

 spectabilis, sp. nov. 

 parallela, Hall (sp.). 

 prismatica. Hall (sp.). 

 Allegania, sp. nov. 

 choanea, sp. nov. 

 corynia, sp. nov. 

 filitextilis, Hall (sp.). 



P. 

 P. 

 P. 

 P. 

 P. 

 P. 

 P. 



P. aulophia, sp. nov. 



P. ptionia, sp. nov. 



P, cercidea, sp. nov. 



P. cithara, sp. nov. 



P. narthecia, sp. nov. 



P. CJonradi, Hall (sp.). 



P. polyhedra, sp. nov. 



Gr. Marshi, sp. nov, 



Genus Gongylospongia, gen. nov. 



H. legatum, sp. nov. 



H. gracile, sp. nov. 



H. tuberosum, Conrad. 



H. tuberosum, 



var. glossema, var. nov 



H. Bathense, sp. nov. 



H. botroedema, sp. nov. 



H. Avoca, sp. nov. 



H. phymatodes, sp. nov. 



H. hypastrum, sp. nov. 



Genus Hydnoceras, Conrad. 



H. eutlieles, sp. nov. 



H. raultinodosura, sp. nov. 



H. Lutheri, sp. nov. 



H. rhopalura, sp. nov. 



H. variabile, sp. nov. 



H. nodosum. Hall (sp.). 



H. anthracis, sp. nov. 



H. eumeces, sp. nov. 



H. Barroisi, nom. nov. 



H. Jeumontense, sp. nov. 



Genus Botryodictya, gen. nov. 



B. ramosa, Lesquereux (sp.). B. (or Tylodictya) sp. nov. 



Genus Tylodictya, gen. nov. 

 T. Warrenensis, sp. nov. T.? tenuis, Hall (sp.). 



Genus Helicodictya, gen. nov. 

 H. tryjiania, sp. nov. H.? Scio, sp. nov. 



H.? Concordia, sp. nov. 



Genus Rhabdosispongia, gen. nov. 

 R. Amalthea, Hall (sp.). R. Condroziana, sp. nov. 



Genus Ceratodictya, gen. nov. 



C. Carpenteriana, sp. nov. C. annulata. Hall (sp.). 

 C. cincta. Hall (sp.). C. centeta, sp. nov. 



C. zonata, sp. nov. 



