1412 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



Lysocystites Miller. 

 iEthocystis Miller. 

 Zophocrinus Miller. 



Order Aporita. 

 Family Cryptocrinioe Zittel. 



Family Macrocystellid^3 Bather. 



Family Tiaracrinid^e Bather. 



Order Edrioasteroidea. 



Family Agelacrinid^e Hall. 

 Agelaerinites Yanuxem, Cystaster Hall, Hemicystites Hall, Streptaster Hall. 



Family Edrioasterid^e Bather. 

 jEsiocystis Miller and Gurley, Edrioaster Billings. 



Family Steganoblastid^ Bather. 

 Astrocystites Whiteaves. 



POSITION UNCERTAIN. 

 Crinocystites Hall, Cyclocystoides Billings and Salter, Lichenocrinus Hall. 



Class BLASTOIDEA. 

 Order Protoblastoidea. 



Family Blastoidocrinid^e Bather. 



Blastoidocrinus Billings. 



Order Eublastoidea. 



Family Troostoblastid^; Etheridge and Carpenter. 

 Troostocrinus Shumard. 



Class CRINOIDEA. 



Order Camerata. 



Family Cleiocrinid^e Springer. 



Cleiocrinus Billings. 



Family Reteocrinid;e Waehsmuth and Springer. 



Reteocrinus Billings. 



Family Dimerocrinid>e Bather. 



Cyphocrinus Miller, Dimerocrinus Phillips, Gazacrinus Miller, Lampterocrinus 

 Roemer, Ptychociinus "Waehsmuth and Springer, Siphonocrinus Miller. 



Family Rhodocrinuxe Roemer. 



Arehaeocrinus Waehsmuth and Springer, Deocrinus Hudson, Diaboloerinus "Waehs- 

 muth and Springer, Hercocrinus Hudson, LyriocrinusHall, Rhaphanocrinus Waehs- 

 muth and Springer, Siderocrinus Troost. 



Family Melocrinid^e Zittel. 



Alloerinus Waehsmuth and Springer, Cystocrmus Roemer, Glyptocrinus Hall, Macro- 

 stylocrinus Hall, Mariaerinus Hall, Melocrinus Goldfuss, Periglyptocrinus Waehs- 

 muth and Springer, Pycnocrinus Miller, Schizocrinus Hall, Scyphocrinus Zenker 

 (Camarocrinus Hall), Stelidiocrinus Angelin. 



