382 SMITHSONIAN INSTITUTION 



Species small and short. 

 Crown wide and spreading. 

 IIBr 3 . 



iBr not touching BB ; anal series bordered by strong plates. . . . T. giddingei. 

 iBr touching BB ; anal series bordered by weak perisome ; 

 IIIBr 3 at inner side of ramus. 



Crown rather longer than wide ; rays low and 



broadly rounded T. shumardianus. 



Crown smaller than in all other species ; wider than 



long; rays rather narrowly elevated T. hitntsvillae. 



IIBr 2. 



iBr very strong, sometimes touching BB ; IIIBr 2 or 3 T. whitfieldi. 



Species referred to other Genera 



The species which were originally described under Taxocrinus, or have been heretofore 

 referred to it by revisors, or are so referred by me, are now distributed among the several 

 genera as follows : 



Temnocrinus. Cyathocrinit.es tuberculatus Miller. 



Meristocrinus. Cyathocrinus interbrachiatus Ang. ; Taxocrinus orbignii M'Coy. 

 Synaptocrinus. Forbesiocrinus nuntius Hall. 

 Euryocrinus. Poteriocrinus granulosus Phillips. 



Dactylocrinus. Dimerocrinus oUgoptilus Pacht ; Forbesiocrinus lobatus var. tardus Hall ; 

 Taxocrinus (Aristocrinus) concavus Rowley ; Zeacrinus excavatus Schultze. 



Synerocrinus. Taxocrinus incurvus Trautschold. 



Wachsmuthicrintjs. Forbesiocrinus spinifer Hall; Forbesiocrinus thiemei Hall. 



Protaxocrinus. Lecanocrinus elegans Billings ; Lccanocrinus laevis Billings ; Taxocrinus 

 anstini Ang.; Taxocrinus distensus Angelin ; Taxocrinus interbrachiatus Ang. ; 

 Taxocrinus ovalis Ang. ; Taxocrinus salteri Ang. ; Taxocrinus tubuliferous Ang. 



Gnorimocrinus. Taxocrinus expansus Angelin. 



Eutaxocrinus. Cyathocrinus brachydactylus Roemer ; Cyathocrinus rhenanus Roemer; 

 Taxocrinus aflinis Muller; Taxocrinus curtus Williams; Taxocrinus fletcheri 

 Worthen ; Taxocrinus gracilis Meek and Worthen ; Taxocrinus ithacensis Williams ; 

 Taxocrinus juglandiformis Schultze; Taxocrinus oblongatus Angelin; Taxocrinus 

 rigens Ang. ; Taxocrinus sturtsii Follmann. 



Taxocrtnus. Cyathocrinus ( ?) macrodactylus Phillips ; Forbesiocrinus giddingei Hall ; 

 Forbesiocrinus juvenis Hall ; Forbesiocrinus kelloggi Hall ; Forbesiocrinus lobatus 

 Hall ; Forbesiocrinus rawulosus Hall ; Forbesiocrinus shumardianus Hall ; For- 

 besiocrinus whMeldi Hall; Poteriocrinus nobilis Phillips; Taxocrinus communis 

 Hall ; Taxocrinus colletti White ; Taxocrinus intermedins Wachsmuth and Springer ; 

 Taxocrinus interscapulars Hall ; Taxocrinus stultus Whidborne ; Taxocrinus 

 ungula Miller and Gurley. 



Parichthyocrinus. Forbesiocrinus meeki Hall ; Taxocrinus crawfordsvillensis Miller and 

 Gurley ; Taxocrinus subovatus M. and G. 



Onychocrinus. Forbesiocrinus diversus Meek and Worthen ; Forbesiocrinus norwoodi 

 M. and W. ; Forbesiocrinus norwoodi M. and W. ; Forbesiocrinus semiovatus M. and 

 W. ; Poteriocrinus egertoni Phillips ; Taxocrinus polydactylus M'Coy. 



Rhopalocrinus. Taxocrinus gracilis Schultze. 



