BIOLOGICAL CLASSIFICATION. 1413 



Family CALYPTOCRINID;E Angelin. 



Callicrinus Angelin, Chicagocrinus Weller, Eucalyptocrinus Goldfnss. 

 Family BATOCRINID/E Wachsmuth and Springer. 



Acacocrinus Wachsmuth and Springer, Barrandeocrinus Angelin, Compsocrinus Miller, 

 Habrocrinus Angelin, Periechocrinus Austin, SaccocrinusHall, Tanaocrinus Wachs- 

 muth and Springer, Xenocrinus Miller. 



Family PLATYCRINID^E Roemer. 

 Coccocrinus Miiller, Cordylocrinus Angelin, Marsipocrinus Bather, Platycrinus Miller. 



Order FLEXIBILIA. 

 Suborder SAGENOCRINOIDEA. 



Family LECANOCRINID^E Springer. 



Anisocrinus Angelin, Asaphocrinus Springer, LecanocrinusHall, Ormocrinus Springer, 

 Pycnosaccus Angelin. 



Family SAGENOCRINID^E Springer. 

 Sagenocrinus Austin, Temnocrinus Springer. 



Family ICHTHYOCRINIOE Wachsmuth and Springer. 

 Clklochirus Angelin, Ichthyocrinus Conrad. 



Suborder TAXOCRINOIDEA. 



Family TAXOCRINIDJE Bather. 



Eutaxocrinus Springer, Gnorimocrinus Wachsmuth and Springer, Protaxocrinus 

 Springer. 



Order INADUNATA. 

 Suborder LARVIFORMIA. 



Family STEPHANOCRINID^E Wachsmuth and Springer. 

 Stephanocrinus Conrad. 



Family PISOCRINID.-E Angelin. 

 Pisocrinus Dekoninok. 



Family HAPLOCRINIDJS Roemer. 

 Haplocrinus Steininger. 



Family SYNBATHOCRINID^E Wachsmuth and Springer. 

 Synbathocrinus Phillips. 



k Suborder FISTULATA. 



Family HYBOCRINID.E Zittel. 

 'bocrinus Billings, Hybocystis Wetherby. 

 Family HETEROCRINID^E Zittel. 

 tenocrinus Miller, Heterocrinus Hall, locrinus Hall, Myelodactylus Hall, Ohio- 

 jrinus Wachsmuth and Springer. 



Family ANOMALOCRINID.E Wachsmuth and Springer. 

 Anomalocrinus Meek and Worthen, Glaucocrinus Parks. 



Family CREMACRINID^E Ulrich. 

 Cremacrimis Ulrich, Deltacrinus Ukich, Eucheirocrinus Meek and Worthen. 





