ECHINODERMATA. 215 



Family Glyptocrinid^e. — Archaeocrinus, Compsocrinus, Glyptocrinus, Pycno- 



crinus, Schizocrinus. 

 Family Haplocrinid^e. — Coccocrinus, Haplocrinus. 



Family HeterocriniDvE. — Ectenocrinus, Heterocrinus, Iocrinus, Ohiocrinus. 

 Family Hybocrinid^e. — Anonialocrinus, Hybocrinus. 

 Family Ichthyocrinid^e. — Cleiocrinus, Ichthyocrinus, Lecanocrinus, Mespilo- 



crinus, Nipterocrinus, Onychocrinus, Taxocrinus. 

 Family Melocrinidjf. — Allocriiius, Dolatocrinus, Macrostylocrinus, Maria- 



crinus, Technocrinus. 

 Family Pisocrinid.e. — Pisocrinus. 

 Family Platycrindj^e. — Cordylocrinus, Eucladocrinus, Marsupiocrinus, Platy- 



crinus. 

 Family Poteriocrinid^e. — Bursacrinus, Cceliocrinus, Dendrocrinus, Graphio- 



crinus, Homocrinus, Hydreionocrinus, Merocrinus, Ottawacrinus, Poter- 



iocrinus, Stemmatocrinus, Zeacrinus. 

 Family Rhodocrinidjf. — Goniasteroidocrinus, Hadrocrinus, Lyriocrinus, 



Rhodocrinus. 

 Family Synbathocrinid.e. — Synbathocrinus. 

 Family Taxocrinid^e. — Cupulocrinus, Forbesiocrinus, Taxocrinus. 

 Family Xenocrinid^e. — Xenocrinus. 

 Family affinity uncertain. — Brachiocrinus, Closterocrinus, Cystocrinus. 



Order Cystoidea. 



Family Amygdalocystid^e. — Amygdalocystites, Palaeocystites. 



Family Anom alocystid^e. — Anomalocystites. 



Family Caryocrinid^e. — Caryocrinus. 



Family Comarocystid^e. — Comarocystites. 



Family Echinocystid;f. — Echinocystites. 



Family Eocystidje. — Eocystites. 



Family Gomphocystidjf. — Gomphocystites, Hemicosmites. 



Family HolocystidjE. — Allocystites, Crinoeystites, Holocystites. 



Family Hybocystid^e. — Hybocystites. 



Family Lepadocrinid^e. — Apiocystites, Callocystites, Glyptocystites, Lepado- 



crinus, Pleurocystit.es, Sphaerocystites, Strobilocystites. 

 Family Platycystltle. — Platycystites. 

 Family uncertain. — Heterocystites, Lysocystites, Malocystites, Porocrinus. 



Order Blastoidea. 



Family Blastoidocrinid^e. — Blastoidocrinus. 



Family Codasterid^e. — Codaster, Heteroschisma. 



Family Codonitid^e. — Codonites. 



Fa mily EleutherocrinidjE. — Ele uth erocriu us. 



Family Granatocrinid^e. — Granatocrinus, Schizoblastus. 



Family Nucleocrinid.e. — Nucleocrinus. 



Family Pentremitid^. — Pentremites, Pentremitidea. 



Family Stephanocrinid^e. — Stephanocrinus. 



Family Troostocrinidje. — Troostocrinus, Tricoelocrinus. 



