CARBONIFEROUS FOSSILS OF IRELAND. 179 



Cyathocrinus conicus. Phil. 



Cyathocrinus conicus. Phil. Geol. York. 



Sp. Ch. — Cup elongate, conic ; pelvis deep, supporting five pentagonal costals, one-tliird longer than 

 wide, bearing five scapulae ; surface granulated. 



This narrow, lengthened species is found very rarely. The specimens are too imperfect to give the 

 measurements. 



Cyathocrinus ellipticus. Phil. 



Cyathocrinus ellipticus. Phil. Pal. Fos. 



The only characters for which the columns to which Professor Phillips has given this name are remarka- 

 ble, is the very great thickness of the joints; the canal is pentagonal or pentaphylloidal ; surfaces of articulation 

 finely striated ; section usually elliptical, sometimes round. 



Cyathocrinus geometricus. Gold. 



Cyathocrinus geometricus. Gold. Pet. — Cyathocrinus geometricus. Phil. Pal. Fos. 



Only single costal plates of this species have been yet found in Ireland ; they are easily recognized by 

 tlieir beautifully radiated surface. 



Cyathocrinus inequidactylus. M'Coy. (PI. XXVI. fig. 8). 



The above name was provisionally given to a small species of Cyathocrinus, resembling the C. planus, but 

 with fingers of very unequal length. 



Cyathrocrinus MACROCHEiRus. M'Coy. (PI. XXV. fig. 8-10). 



Sp. Ch. — Column pentagonal; from fourteen to seventeen joints in each hand. 



This species is at first sight nearly allied to the C quinqnaiujularis. Mill., but it is readily distinguished 

 from it and all others by the enormous length of the hands, those of the C. quimjutuu/ularis being composed 

 of only two or three joints; the column of the present species is pentagonal, the joints alternately thicker 

 and thinner, with every fifth one larger ; the five plates of the pehas are rather longer, and more pointed 

 than those of the C. quinquangularis, but the costals are shorter, their length and width being about equal ; the 

 arms are formed each of two joints, broader than long, and a cuneiform one, longer than broad, from which two 

 hands proceed, each having from fourteen to seventeen joints, and a cuneiform one, from which proceed two 

 fingers, each composed of about twenty-seven joints, and a cuneiform one, from which others again proceed; 

 the surfaces of all the j)lates are smooth. 



Cyathocrinus megastylus. Phil. 



Cyathocrinus megastylus. Phil. Pal. Fos. 



This name is merely given to some very large stems o( Ci/athocriiii, the characters of which have not been 

 determined ; the Irish specimens are identical with those figured by Professor Phillips. 



Cyathocrinus ornatus. Phil. 



Cyathocrinus ornatus. Phil. Geol. York. 



A single plate only of this species has occurred ; it is easily recognized by two sets of granulated striae 

 which meet at an acute angle in the centre of the plates. 



