8 Schuchertiacea. — Lapworthuridae. Pars 3 
Superfamily Schucliertiacea Schuchert. 
Family Sclmchertiidae Schuchert. 
Sehuchertia Gregory (syn. Trentonaster Stiirtz). 
Family Palasteriscidae Gregory. 
Palasteriscus Stiirtz. Echinasterella Stiirtz. Loriolaster Stiirtz. 
Cheiropteraster Stiirtz. 
Family Schoenasteridae Schuchert. 
Schoenaster Meek and Worthen. 
Superfamily Palaeosolasteracea Schuchert. 
Family Palaeosolasteridae Schuchert. 
Palaeosolaster Stiirtz. Ecliinasterias Stiirtz. Echinodiscites Schuchert 
(syn. Echinodiscus Stiirtz). Ecliinostella Stiirtz. Medusaster 
Stiirtz. 
Subclass Auluroidea Schondorf. 
Order Ly^opliiurae Gregory. 
Family Protasteridae Miller. 
Taeniaster Billings (syn. Taeniura Gregory). Eopliiura Jaekel. Boke- 
mura Jaekel. Palaeura Jaekel. Protaster Forbes. Alepidaster 
Meek (syn. Protasterina Ulrich). Gregoriura Chapman. Bunden- 
bachia Stiirtz. Palaeophiomyxa Stiirtz. 
Family Palaeopliiuridae Gregory. 
Palaeophiura Stiirtz. Sturtzura Gregory. Eugasterella Schuchert (syn. 
Eugaster Hali). Ptilonaster Hali. 
Family Encrinasteridae Schuchert, 
Encrinaster Haeckel (syn. Aspidosoina Goldfuss). 
Order Ntreptopliiurae Bell. 
Family Ophiurinidae Gregory. 
Ophiurina Stiirtz. Tremataster Worthen and Miller. 
Family Lapworthuridae Gregory. 
Squamaster Ringueberg. Lapworthura Gregory. Sturtzaster Etheridge 
(syn. Palaeocoma Salter). Bdellacoma Salter. Rliopalocoma 
Salter. Hallaster Stiirtz. Sympterura Bather. Furcaster 
Stiirtz. Palastropecten Stiirtz (syn. Palaespondylus Stiirtz). 
