1414 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



Family Dendrocrinice Bather. 



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

 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- 

 erinus 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, Paehyoerinus Billings, Podolithus Sardeson, Thalamoerinus Miller and 

 Gurley. 



Subphyllum AsterozoA. 



Class STELLEROIDEA. 



Subclass Asteroidea. 



Order Phanerozonia. 



Family Hudsonasterid^e Schuchert. 



Hudsonaster Sturtz. 

 Palseaster Hall. 



Family Pal.easterid.e Gregory. 



Family Promopaljeasterid-E Schuchert. 



Anorthasier Schuchert, Mesopalseaster Schuchert, Promopalseaster Schuchert. 



Family Palasterinice Gregory. 

 Petraster Billings. 



Stenaster Billings. 

 Urasterella McCoy. 

 Schuchertia Gregory. 



Family Stenasterid;e Schuchert. 

 Family Urasterellid;e Schuchert. 

 Family Schuchertiice Schuchert. 



Subclass Auluroidea. 

 Order Lysophiur^e. 



Family Protasterid^e Miller. 

 Alepidaster Meek, Protaster Forbes, Tseniaster Billings. 



Family Pal^ophiuriD/E Gregory. 

 Eugasterella Schuchert. 



Order Streptophiur^e. 



Family Lapworthurid^e Gregory, 

 Squamaster Ringueberg. 



