894 



DR. F. A. BATHER ON 



51. The Fossil Crinolds referred to Hypocrimis Beyricli. 

 Bj F. A. Bather, M.A., D.Sc, F.R..S., F.Z.S.* 



[Received September 8, 1913 : Read October 28, 1913.] 

 (Plate XC. and Text-figures 158-160.) 



CONTEI^TS. Ti 



i ap:e 



Preface 894 



Previous History 895 



Suborder Cyathocriuoidea 898 



Family Gasterocomidie 898 



Sypocriniis, diagnosis 899 



Hypocrimis schneideyi 900 



" Ilypocrinus " piriformis 905 



Generic diagnosis 912 



Summary' 913 



Explanation of Plate 913 



Index. 



Tlypocrinus, history of opinion 895 



„ rediagnosed 899 



Hypocrimis schneideri redescribed 900 



^Hypocrimis" piriformis redescribed and referred to the 

 Taxocrinidse as a neM- genus, diagnosed but not named ... 905 



Coenocystis Girty, not a Cystid 897 



Myrtillocrinus Sandb., not a Gastevocomid 899 



Lecythiocrinus adam.si compared with Hypocrinus 899 



Cydonocrinus compared with " Hypocrinus^' piriformis ... 911 

 Gasterocomida? diagnosed and discussed 898 



Preface. 



Early in 1908 a crinoid cup from the Carboniferous rocks of 

 Yorkshire, elsewhere described as Cydonocrinus parvulusf, was 

 submitted to me by Mr. D. M. S. Watson. Some curious features 

 in it suggested a comparison with II)/]Jocrinus, which had occupied 

 my pen at intervals during the previous twenty years, but of which 

 I had not seen actual specimens. Without delay all the known 

 fossils that had been referred to the genus were borrowed for 

 study. This proved a lengthy business, involving patient pre- 

 paration and microscopic examination. By the end of 1910, 

 however, their description was drawn up and a series of illustra- 

 tions prepared, vi'hen another specimen was reported as obtained 

 from Timor by the Elbert-Sunda Expedition. Correspondence 

 ensued with Dr. J. Elbert and Dr. J. Wanner, but the latter 



* Published by permission of the Trustees of the British Museum. 

 + P. A. Bather, 1913, "British Fossil Crinoids, IX.," Ann. Mag. Nat. Hist. ser. 8, 

 vol. xii. pp. S88-394. 



