410 PROCEEDINGS OF THE ACADEMY OP [1881. 



Khodocrinus Miller. 



R. asperatus Billings. Not suflSciently known. 



R. Barrisi (var.), divergens Hall, syn. of Rh. Barrisi. 



R. bursa Phillips (Austin). See Ollacr. bursa. 



R. calcaratus Phillips (Austin), see Ollacr. calcaratus. 



R. canaliculatus Goldf. Detached columns. 



R. costatus Austin. Not sufficiently defined. 



R. crenatus Goldf., see Rhipidocr. crenatus. • 



R. tchinatus Schlottheim, Detached columns. 



R. gigas Billings. Detached columns. 



R. granulatus Austin. Not sufficiently defined, 



R. gyratus Goldf. Detached columns. 



R. melissa Hall, see Lyriocr. melissa. 



R. mammillaris Phill. (Austin), Ollacr. mammillaris. 



R. microbasilis Billings, see Archseocr. microbasilis. 



R. mutabilis Austin. Not defined. 



R. pyriformis Billings, see Archseocr. pyriformis. 



R. quinquangularis Miller. Detached columns. 



R. quinquelobus Schultze, see Eucrinus quinquelobus. 



R. quinquepartitus Goldf. Detached columns. 



R. rectus Hall, (Probably a Cystidean.) 



R. simplex Portlock (?). 



R. tessellatus Steininger, syn. of Rhipidocr. crenatus. 



R, iortuosus Roemer. Detached columns. 



Saccoorinas Hall, syn. of Periechocrinus. 

 S. Christyi Hall, see Periechocr, Christyi. 

 S. semiradiatus Hall. Described from a cast, 

 S. speciosus Hall, see Periechocr. speciosus. 

 S. tennesseensis Troost, Not defined. 

 S. Whitfieldi Hall, syn, of Periechocr. Christyi. 



Sagenocrinus Austin. 



S. giganteus Austin. Not sufficiently defined, 



Schizocrinus Hall, see " doubtful genera." 



Scyphocrinus Hall (not Zenker). Ibid, 



Sphaerocrinus Meek and Worth, (not Roemer), see Dorycrimis. 

 S. concavus Meek and Worth., see Dorycr. concavus. 



Sphenocrinus Eichwald. Described from pieces of column. 



Strotocrinus Meek and Worthen. 



(S. asperrimus Meek and Worth., see Actinocr. asperrimus. 

 S. segilops Hall (M. and W.), see Teleiocr. segilops. 

 S. althea Hall (M. and W.), see Teleiocr. althea. 



