﻿44 MR. T. F. SIBLT OX THE FATJNAL SFCCESSIOX IN THE [Feb. I908, 



other sections of D^, that given by the Grin Works, near Buxton, 

 may be specially noted. The beds there exposed are massive white 

 limestones, which probably represent the ' Chee-Tor beds,' that is, 

 the beds under the lower toadstone of the typical section. The 

 common occurrence of Cyrtina septosa^ in association with 

 abundant specimens of Daviesiella comoides and Alveolites se_ptosa, 

 merits especial mention. 



jSTote on the probable horizon of the Productus- 

 Jiumerosus beds of Caldon Low. — The limestones extensively 

 quarried on Caldon Low, south of Waterhouses, at the south- 

 western extremity of the area, contain Productus liumerosus, Sow., 

 a remarkable species which has not been recorded in any other 

 part of the area. The series of beds exposed in the Caldon-Low 

 quarries consists mainly of very massive, white or light-grey lime- 

 stones, and is, as a whole, poorly fossiliferous. In addition to 

 Productus humerosus, the only brachiopods that I have recorded 

 are Daviesiella aff. comoides, which is abundant in certain beds of 

 grey limestone, and Ortliothetes cf. crenistria ; and the only coral found 

 is Syringoi^ora sp. (?). On account of the extensive faulting in this 

 locality, I have not succeeded, in the course of a brief investigation, 

 in obtaining any stratigraphical proof of the horizon of this series of 

 beds. Lithologically, however, the series resembles the upper part 

 of D^, as seen in the typical section and in many other parts of the 

 area ; while the abundance of Daviesiella aff. comoides in certain 

 beds and the apparent absence of any fossils characteristic of a 

 higher horizon than D^ support the reference of the series to this 

 subzone. 



D2 = Subzone of Lonsdalia floriformis. 



Faunal list: — 

 Corals : 



Zaphrentids of several types, includ- 

 ing Zaphreniis aff. Enniskilleni, 



£d. & H. 

 Cyathaxonia rushiana, Vaughan. 

 Michelinia gloraerata, M'Coy. 

 Syringapora cf. distaiis, Fischer. 

 Syringopora cf. geniculata, Phil. 

 Syringopora cf. reticulata, Goldf. 

 Alveolites septosa (Flem.) & var. 



depressa (Flem.). 

 Campophyllum derbie?ise, Vaughan 



(MS.). 

 Campophyllum aff. caninoides, Sibly. 

 CyathophqUum aff. Murchisoni (!) , 



Ed. & H. 

 Cyathophyllum regium, Phil. 

 Diphyphyllum, including D. latesep- 



tatum,M'Coy; and Cyathophylloid 



forms, such as CyathopliyUum par- 



ricida, M'Coy. 

 Lithostrotion junceum ( Flem.). 



Lithostrotion irregulare (Phil.) & mut. 

 towards L. Ma/rtini, Ed. & H. 



Lithostrotion Martini, Ed. & H. 



Lithostrotion aff. Portlocki (Bronn), 

 Ed. & H. 



Lithostrotion aff. M' Coyanum, Ed. & 

 H. 



Lithostrotion Flemingi, M'Coy. 



K.oninckophyllum proprium, sp. nov. 



Lonsdalia duplicata (Mart.). 



Lonsdalia floriformis (Flem. ). 



Simple ClisiophylUds of numerous 

 types, including Clisiophyllum aff. 

 M' Coyanum, Thorns. ; Dibunophyl- 

 lam, represented by D. matlockense, 

 sp. nov., I), derhicnse, sp. nov., and 

 other forms ; Histiophyllum, Ehodo- 

 phyllum, and Cymatiophyllum ; and 

 Cyclophylliirn aff. pachyendothecum, 

 Thoms. 



