Pars 3 
Neopalaeasteridac. — Compsasteridae. 
7 
Family Neopalaeasteridae Schuchert. 
Neopalaeaster Schuchert. 
Superfamily Palastertnacea Schuchert. 
Family Palasterinidae Gregory. 
Petraster Bilhugs. Lindstromaster Gregory (syn. Hisingeraster Stiirtz). 
Palasterina Salter. Uranaster Gregory. Palaeostella Stiirtz 
(syn. Palaenectria Stiirtz). Pseudopalasterina Stiirtz. 
Superfamily Lepidas teracea Schuchert. 
Family Lepidasteridae Gregory. 
Lepidaster Forbes. Helianthaster Roemer. Lepidasterella Schuchert. 
Relalionsliip unknowu. 
Ataxaster Jaekel. 
Cryptozonia Sladen. 
Superfamily Stenasteracea Schuchert. 
Family Stenasteridae Schuchert. 
Stenaster Billings. Tetraster Nicholson and Etheridge. 
Family Monasteridae Schuchert. 
Monaster Etheridge (syn. Etheridgaster Gregory). 
Superfamily IJpasterellacea Schuchert. 
Family Urasterellidae Schuchert. 
Urasterella McCoy (syn. Roemeraster, Protasteracanthion and Salter 
aster Stiirtz). 
Family Calliasterellidae Schuchert. 
Calliasterella Schuchert (syn. Calliaster Trautschold). 
Family Compsasteridae Schuchert. 
Jaekelaster Stiirtz. Compsaster Worthen and Miller. 
