202 Mr. F. A. Batlier on Driu'sh Fossil Crinoids : 



The addition of this genus to the Dendrocvinites suggests 

 that, after all, Thenarocrinus, to which it is so closely allied, 

 may find more fitting companionship with that family-party 

 than with the somewhat peculiar Curahocrinus. The latter 

 is in truth a crabbed unsociable animal, whose nature, through 

 the kindness of my Canadian friends, is now becoming better 

 known to me. 



EXPLANATION OF PLATE XIL 



Mastigocriniis loreus, gen. et sp. nov. 

 Fiq. 1. The smaller specimen in the Dudley Museum. 

 Fiff. 2. 133 Mason Colleffe. 

 Fiff. 3. 57048 B.M. (See p. 195.) 



From a photograph of the specimens, about ^\ larger than nature. 



XXXII. — British Fossil Crinoids. — VIII. Cyathocrinus: C. 

 acinotubus, Ang., and C. vallatus, sp. nov., Wenlock Lime- 

 stone. By F. A. Bather, M.A., F.G.S. 



[Plate XIII.] 



Historical Ixtroduction. 



The name Cyathocrinus, or, as it used to be written, Cyatho- 

 crinites, was first used by J. S. Miller in 1821 on page 85 of 

 his ' Natural History of the Crinoidea,' and is derived from 

 Kva6o<;, a cup ; it has also been used by all subsequent 

 writers on the subject. "When, however, we enquire what 

 particular form of Crinoid should be denoted by this name, 

 we are speedily involved in difficulties. Fortunately ^lessrs. 

 Wachsmuth and Springer, in their ' Revision of the Palteo- 

 crinoidea' (I. 79; Proc 1879, p. 802), have dealt fully with 

 this subject, and their conclusions accord with common sense 

 and with the rules of nomenclatui'e. There are only a few 

 points in which insufficient acquaintance with European 

 material or European literature has led them astray. Since 

 their work is, or should be, in the hands of every serious 

 student of the Crinoids, a short explanation of the position 

 adopted is all that is here required. 



The four sjiecies referred by Miller to Cyathocrinus belong 

 to four different genera, not to mention families and suborders. 

 The first of these, C. planus, should of course be taken as the 

 type: the others are now known as Taxocrinus tuherculatus, 

 Crotalocrinus rugosus {=C. verrucosus, Schloth., sp,), and 

 Parisocrinus quinquangularis. 



As to C. p/a«MS itself a little difficulty has arisen. Miller's 



