1414 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



Family DENDROCRINID.E Bather. 



Cupulocrinus D'Orbigny, Dendrocrinus Hall, Merocrinus Walcott, Ottawacrinua 

 Billings. 



Family CROTALOCRINID^E Angelin. 



Crotalocrinus Austin, Petalocrinus Weller. 



Family CYATHOCRINID^E Roemer. 



Achradocrinus Schultze, Ampheristocrinus Hall, Carabocrinus Billings, Closterocri- 

 nus Hall, Cyathocrinus Miller, Euspirocrinus Angelin, Gissocrinus Angelin, Homo- 

 crinus Hall, Lasiocrinus Kirk, Palseocrinus Billings, Porocrinus Billings. 



Family BOTRYOCRINID/E Bather. 

 Botryocrinus Angelin. 



UNCERTAIN PLACE. 



Astroporites Lambe (Base of crinoid ?Cliocrinus), Bolboporites Pander, Empero- 

 crinus Miller and Gurley, Indianocrinus Miller and Gurley, Mitrocrinus Miller and 

 Gurley, Pachyocrinus Billings, Podolithus Sardeson, Thalamocrinus Miller and 

 Gurley. 



Subphyllum ASTEROZOA. 



Class STELLEROIDEA. 



Subclass ASTEROIDEA. 



Order PHANEROZONIA. 



Family HUDSONASTERID^ Schuchert. 

 Hudsonaster Sturtz. 



Family PAL^ASTERID^J Gregory. 

 Palaeaster Hall. 



Family PROMOPALJEASTERID^E Schuchert. 

 Anorthaster Schuchert, Mesopalseaster Schucliert, Promopalaeaster Schuchert. 



Family PALASTERINID^E Gregory. 

 Petraster Billings. 



Family STENASTERID^E Schuchert. 

 Stenaster Billings. 



Family URASTERELLID^E Schuchert. 

 Uraeterella McCoy. 



Family SCHUCHERTIID^E Schuchert. 

 Schuchertla Gregory. 



Subclass AULUROIDEA. 

 Order LYSOPHIUR^E. 



family PROTASTERID^E Miller. 

 Alepidaster Meek, Protaster Forbes, Tseniaster Billings. 



Family PAL^OPHIURID^: Gregory. 

 Eugasterella Schuchert. 



Order STREPTOPHIUR^. 



Family LAPWORTHURID^Q Gregory. 

 Squamaster Ringueberg. 



