202 Mr. F. A. Bather on British Fossil Crinoids : 
The addition of this genus to the Dendrocrinites suggests 
that, after all, Zhenarocrinus, to which it is so closely allied, 
may find more fitting companionship with that family-party 
than with the somewhat peculiar Carabocrinus. The latter 
is in truth acrabbed unsociable animal, whose nature, through 
the kindness of my Canadian friends, is now becoming better 
known to me. 
EXPLANATION OF PLATE XIZ. 
Mastigocrinus loreus, gen. et sp. nov. 
Fig. 1. The smaller specimen in the Dudley Museum. 
Fig. 2. 183 Mason College. 
Fig. 3. 57048 B.M. (See p. 195.) 
From a photograph of the specimens, about 5 larger than nature. 
XXXU.—British Fossil Crinoids—VIII. Cyathocrinus: C. 
acinotubus, Ang., and C. vallatus, sp. nov., Wenlock Lime- 
stone. By F. A. Batuer, M.A., F.G.S. 
[Plate XIII] 
HISTORICAL INTRODUCTION. 
THE name Cyathocrinus, or, as it used to be written, Cyatho- 
ertnites, was first used by J. 8. Miller in 1821 on page 85 of 
his ‘ Natural History of the Crinoidea,’ and is derived from 
Kvaos, 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 difficuities. Fortunately Messrs. 
Wachsmuth and Springer, in their ‘ Revision of the Paleo- 
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 nomenclature. There are only a few 
points in which insufficient acquaintance with Huropean 
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 species 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 Tawocrinus tuberculatus, 
Crotalocrinus rugosus (=C. verrucosus, Schloth., sp.), and 
Parisocrinus quinquangularis. 
As to C. planus itself a little difficulty has arisen. Miller’s 
