66 



Descriptions of New Species of Fossils 



Cyathocrinus (Poteriocrinus) ^mulus n. sp. 



Body pentangularly si%bturbinate, rapidly attenuate below the 

 summit of the subradial plates, and expanded above ; the anal side 

 prominent. Basal plates with a prominent node at the base of each 

 one : subradials higher than wide : radial plates wide, pentagonal, 

 with the upper side deeply cicatrised for the arm attachment. First 

 anal plate quadrangular, the second one large unequally pentagonal, 

 and cicatrised on the upper side as in the radial plate. Surface 

 granulose. Arms and column unknown. 



This species differs from C. Folyxo of the same formation and 

 locality, in its more elongate form and less robust character. 



Poteriocrinus ? calyx n. sp. 



Calyx turbinate. Basal plates strong, thickened at their lower 

 margins, forming a distinct annulation at the base, and having a height 

 a little less than half the height of the subradial plates : subradial 

 plates elongate, three of them hexagonal, the anal side being un- 

 known. Surface of the plates granulose. 



The only specimen examined is imperfect and its full charac- 

 ters are unknown. The strong basal plates with the annulated lower 

 margin, and the unusually elongate subradial plates are distinguish- 

 ing features of the species, and present characteristic differences 

 from any other species known in the formation. 



EuCALYPTOCRmUS CONSTRICTUS U. Sp. 



Body subturbinate, narrow below and abruptly expanding from 

 the second radial plates ; becoming ventricose and pentalobate 

 above. Basal plates large, their entire characters undetermined. First 

 radial plates wider than high, the lateral margins scarcely expand- 

 ing, little incurved; indented on the lower margins for the reception 

 of the basal plates, gently concave on the upper margin, the upper 

 lateral angles truncated for the support of a large interradial plate 

 with narrow base, the surface of which is moderately concave. The 

 second and third radial s are quadrangular and pentagonal ; the sum- 

 mit of the latter reaching to the point of greatest gibbosity in the 

 calyx, and supporting on the sloping sides the supraradial plates, 

 being scarcely truncated at the upper extremity for the reception of 



