104 



MESOZOIC AND CENOZOIC ECHINODERMATA OF THE UNITED STATES. 

 Geologic distribution of the Cenozoic Eehinodermata of the United States — Continued. 



Echinoidea— Continued. 

 Irregularia— Continued. 



Atelostomata— Continued. 

 Asternata— Continued. 



Cassidulida? — Continued. 



Cassidulus (I'ygorhynchus) conradi Conrad 



Cassidulus ( I'ygorhynchus) caruliuensis Twitchell. 



Cassidulus ( I'ygorhynchus) georgiensis Twitchell. . 



Cassidulus ( rvgorhynchus) gouldii Bouve" 



Cassidulus (Pygorhynrhus) alabamensis Twitchell. 



Cassidulus bassleri Twitchell 



Cassidulus berryi Twitchell 



Breynella gregoryi Twitchell 



Echinolninpas appcndieulal us Emmons 



Echinolampas aldrichi Twitchell 



Stemata — 



Spatangidse — 



Hemipatagus argutus Clark 



Hemipatagus subrostratus Clark 



Schizastcr lecontei Merriam — 



Schizaster armiger Clark 



Schizaster sp •. 



Schizastcr floridanus Clark 



Schizastcr amcricana Clark 



Schizaster (?) stalderi Weaver 



Schizaster atropos ( Lamarck) 



Linthia wilmingtonensis Clark 



Linthia alabamensis Clark 



Linthia (?) californica Weaver 



Eupatagus carolinensis Clark 



Eupatagus floridanus Clark 



Brissopsis rimulatus Ravenel 



Macropneust.es carolinensis Clark 



Macropncustes mortoni (Conrad) 



Sarselfa gregoryi Clark 



Spatangus (? ) pachocoensis Pack 



Agassizia conradi (Bouv£) 



Agassizia porifcra ( Ravenel) 



Echinocardium orthonotum Conrad 



Echinocardium depressum Clark 



Echinocardium gothicus (Ravenel) 



Brissus spatiosus (Ravenel) 



Metaliaravenelianus McCrady 



Metalia holmesi McCrady 



Holothurioidea: 



Paractinopoda — 



Synaptidse — 



Chiridota sp 



Synapta sp 



Stratigraphic distribution of eastern Gulf Eocene and Oligocene Eehinodermata. 



Midway. Wilcox 



Vicks- Apalachi- 

 burg. cola. 



Cidaris bland is do Greiiorio 



Cidaris ordinatus de Gregorio 



Cidaris perdubius de Gregorio 



Cidaris maTcus de Gregorio 



Cidaris modest us de Gregorio 



Cidaris alabamensis Morton 



Cidaris sp 



Cidaris mortoni Conrad 



Cidaris smithi Clark 



Cidaris georgiana Clark 



Ccelopleurus aldrichi (.'lark 



Orthechinus pretiosus Clark 



Gagaria americana Clark 



Echinus exerceus de Gregorio 



Echinus sp 



Echinocyamus huxleyanus Meyer. . . 



Echinocyamus texanus Twitchell 



Echinocyamus vau gharri Twitchell. . 



Fibularia meridional is (Meyer) 



Laganum eldridgei Twitchell 



Laganum archcronsis Twitchell 



Laganum j ohnsoni Twitchell .... 



Laganum ftoridanum Twitchell 



Laganum dalli Twitchell ; . . . 



Scutella mississippiensis Twitchell... 



Mortonellaquin<[ue!'aria (Say) 



Periarchus lyelli Conrad 



Periarchus protuberans Twitchell ... 

 Periarchus pileus-sinensis (Ravenel). 



Olypeaster rogersi (Morton) 



Echinanthus georgiensis Twitchell... 



Amblypygus mexrilli Twitchell 



Oligopygus wet herbyi De Loriol 



Oligopygus haldermani (Conrad) 



