REVISION OF PALEOZOIC STELLEEOIDEA. 



27 



Trimeraster parvulus Schondorf 134 



Trochitaster plumiformis "^^ nght= Trichotaster plumiformis. 



XJranaster Gregory 154 



U. elizx Spencer 155 



U. hinahani (Baily) 155 



Uraster hirudo Forbes= Urasterella hirudo 188 



U. ohtusvLS FoThes= Stenaster (?) ohtusus 167 



U. pi'ivixvus Forhes= Palasterina primxva 153 



U. ruthveni Forbes= Urasterella ruthveni 187 



Urasterella McCoy 173 



Urasterella Sturtz l%^'i=Stenaster 163 



Z7. (f ) asperrima (Salter) 187 



U. asperula (Roemer) 188 



U. (?) constellata (Thorent) 187 



U. girvanensis, new species 186 



U. grandis (Meek) 180 



U. hirudo (Forbes) 188 



U. huxleyi (Billings) 182 



U. montana (Stschurowsky) 189 



U., new species 189 



U. pulchella (Billings) 178 



TJ. ruthveni (Forbes) 187 



U. selwyni McCoy 188 



U. ulrichi, new species 183 



Xenaster Simonovitsch 129 



X. dispar Schondorf 131 



X. elegans Schondorf 131 



X. eucharis Sch'6ndori=Devonaster eucharis 98 



X. margantatus Follmann=X. elegans 131 



X. margaritatus Simonovitsch 131 



X. margaritatus Simonovitsch (part)=X. dispar and Agalmaster grandis 131, 132 



X. (?) rhenanus (Muller) 131 



X. simplex Sim.onovitsch.= Spaniaster latiscutatus 96 



REMARKS ON THE DEVELOPMENT OF PALEOZOIC STELLEROIDEA. 



Geological. 



Distribution. — This memoir treats of the following Paleozoic 

 Steileroidea : 



