1412 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



Order APORITA. 



Family CRYPTOCRINID^E Zittel. 

 Lysocystites Miller. 



Family MACROCYSTELLID^B Bather. 

 JSthocystis Miller. 



Family TIARACRINID^E Bather. 

 Zophocrinus Miller. 



^ Order EDRIOASTEROIDEA. 



Family AGELACRINID^: Hall. 

 Agelacrinites Vanuxem, Cystaster Hall, Hemicystites Hall, Streptaster Hall. 



Family EDRIOASTERID^: Bather. 

 jEsiocystis Miller and Gurley, Edrioaster Billings. 



Family STEGANOBLASTID;E Bather. 

 Astrocystites Whiteaves. 



POSITION UNCERTAIN. 



Oinocystites Hall, Cyclocystoides Billings and Salter, Lichenocrinus Hall. 



Class BLASTOIDEA. 

 Order PROTOBLASTOIDEA. 



Family BLASTOIDOCRINID^E Bather. 

 Blastoidocrinus Billings. 



Order EUBLASTOIDEA. 



Family TROOSTOBLASTID^E Etheridge and Carpenter. 

 Troostocrinus Shumard. 



Class CRINOIDEA. 

 Order CAMERATA. 



Family CLEIOCRINID^E Springer. 

 Cleiocrinus Billings. 



Family RETEOCRINID,E Wachsmuth and Springer. 

 Reteocrinus Billings. 



Family DIMEROCRINID^E Bather. 



Cyphocrinus Miller, Dimerocrinus Phillips, Gazacrinus Miller, Lampterocrinus 

 Roemer, Ptychocrimis Wachsmuth and Springer, Siphonocrinus Miller. 



Family RHODOCRINID/E Roemer. 



Archaeocrinus Wachsmuth and Springer, Deocrinus Hudson, Diabolocrinus Wachs- 

 muth and Springer, Hercocrinus Hudson, Lyriocrinus Hall, Rhaphanocrinus Wachs- 

 muth and Springer, Siderocrinus Troost. 



Family MELOCRINID^E Zittel. 



Allocrinus Wachsmuth and Springer, Cystocnnus Roemer, Glyptocrinus Hall, Macro- 

 stylocrinus Hall, Mariacrinus Hall, Melocrinus Goldfuss, Periglyptocrinus Wachs- 

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

 (Camarocrinus Hall), Stelidiocrinus Angelin. 



