100 MESOZOIC ECHINODERMATA OF THE UNITED STATES. [boll- 97. 



Page. 



Ophioglypha bridgerensis (Meek) 29 



bridgerensis Clark =Ophioglypha bridgerensis (Meek) 29 



texana Clark 30 



Pedinopsis Pondi Clark 57 



Pentacrinus asteriscus Meek & Hayden, 1858 26 



asteriscus Meek & Hayden, 1860= Pentacrinus asteriscus 



Meek & Hayden 26 



asteriscus Meek, 1864= Pentacrinus asteriscus Meek & Hay- 

 den 26 



asteriscus Clark = Pentacrinus asteriscus Meek & Hayden. . 26 



Bryani Gabb, 1876 : 28 



Bryani Clark = Pentacrinus Bryani Gabb 28 



Whitei Clark 27 



Pentacrinites asteriscus Meek & Hayden, 1865= Pentacrinus as- 

 teriscus Meek & Hayden 26 



( ? ) asteriscus Wliitfield,1880= Pentacrinus asteriscus Meek & 



Hayden 26 



asteriscus White, 1875= Pentacrinus Whitei Clark 27 



(?) asteriscus(?) Hall &Whitfleld,1877= Pentacrinus Whitei 



Clark 27 



(?) asteriscus Whitfield, 1880=Pentacrinus Whitei Clark . . 27 



Phymosoma texanum Desor, 1858=Diploi3odia texanum (Roemer) 48 



Psammechinus cingulatus Clark, 1891 55 



Pseudodiadema diatretum (Morton) 46 



diatretum Desor, 1858= Pseudodiadema diatretum (Morton) . 46 

 diatretum Cotteau,1862-'67= Pseudodiadema diatretum(Mor- 



ton) 46 



diatretum Meek, 1864=Pseudodiadema diatretum (Morton) . 46 



diatretum Conrad, 1868= Pseudodiadema diatretum (Morton) 46 



diatretum Clark=Pseudodiadema diatretum Morton 46 



Emersoni Clark 45 



Hilli Clark, 1891=Diplo.podia Hilli Clark 50 



Roemeri Clark, 1891=Pseudodiadema texanum (Roemer) .. 47 



texanum (Roemer) 47 



texanum Desor, 1858= Pseudodiadema texanum (Roemer). . 47 



texanum Meek, 1864=Pseudodiadema texanum (Roemer) . . 47 



texanum Clark, 1891=Diplopodia texanum (Roemer) 48 



Pygorhynchus crucifer Ravenel, 1850=Trematopygus crucifer 



(Morton) 63 



Pygurus florealis Agassiz, 1847=Ca8sidulus florealis (Morton). . 66 



florealis Conrad, 1868=Cassidulus florealis (Morton) 66 



( 1 ) geometricus (Morton) . 92 



geometricus Agassiz & Desor, 1847=Pygurus (?) geomet- 

 ricus (Morton) 92 



geometricus d'Orbigny, 1847= Pygurus (?) geometricus 



(Morton) -.;■•■■ ,.......,,,,,, 92 



