1881.] NATURAL SCIENCES OP PHILADELPHIA. 411 



S. bloomfieldensis S. A. Miller, syn. of Strotocr. regalis. 



S. ectypus Meek and Worthen, see Actinocr. ectypus. 



S. erodus Hall, see Teleiocr. erodus. 



S. insculptvs Hall (M. VV.), see Teleiocr. insculptus. 



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



S. rudis Hall (M. & W.), see Teleiocr. rudis, 



S. S2ibumbrosus Hall (M. and W.), syn. of Teleiocr. liratus. 



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



Syringoorinus Billings. Imperfectly known. 



<S'. paradoxus Billings. Parts of the arms (?), 



Tazocrinus simplex PMll. (Austin), see Carpocr. simplet. 



Technoorinus Hall. 



T. sculptus Hall. Described from basal plates. 

 T. striatus Hall. Described from basal plates. 



Tetramerocrinites Austin. Insufficiently and evidently incorrectly defined. 

 T. formosus Austin. Undeterminable. 



Trematoorinns Hall. 



T. fiscellus Meek and Worth., see Ollacr. fiscellui. 



T. papillatus Hall, see Ollacr. tuberculosus. 



T. reticulatus Hall, see Ollacr. reticulatus. 



T. robustus Hall, see Ollacr. robuatus. 



T. spinigerus Hall, see Ollacr. spinigerus. 



T. tuberculosus Hall, see Ollacr. tuberculosus. 



T. typus Hall, see Ollacr. typus. 



Triplaricrinites Goldf. A catalogue name. 



Trochicrinites Pander, syn. of Periechocrinus. 



T. gotlandicus Pander, see Periechocr. gotlandicut. 



Trybliocrinus Geinitz {?). 



Thysanocrinus Hall, syn. of Dimerocrinus. 



T. aculeaius Hall. Described from fragmentary arms. 



T. canaliculatus Hall. Arm fragments. 



T. microbasilis Billings, see Archseocr. microbasilis. 



T. immaturus Hall, see Dimerocr. immaturus. 



T. Uliiformis Hall, see Dimerocr. liliiformis. 



T. microbasilis Billings, see Archseocr. microbasilis. 



T. pyriformis Billings, see Archseocr. pyriformis, 



Turbinocrinus Troost. Not defined. 



