﻿440 DE. A. YAT7GHAK ON THE FAUNAE STJCCESSION [Aug. I908, 



Horrocksford Quarry (Colne), is as yet not certainly known below 

 D^, at which level a single specimen was found by Mr. E. E. L. 

 Dixon in the Gower peninsula ; it occurs rarely in P (see under 

 L 18 c) associated with Posidonomya. 



The evidence seems to warrant the suggested horizon, but does 

 not throw any light on the relative positions in D of the Lane and 

 Bihunophyllum-L\m.e&ioTie^. 



(3) The Hush Slates, Rush Conglomerate, and 

 Carlyan Limestone. 



[Emendations of, and additions to, the faunal lists 

 published in the Rush paper.^] 



(a) Rush Slates (loc. cit.). 



For Zaphrentis cf. FhilUpsi, substitute 



Zcqohrentis O'inaliusi, var, densa, Carruthers^ and 

 Zaphrentis Omaliusi, var. amhigua, Carruthers. 



(6) Eush Conglomerate {megastoma-hedi^) {op. cit. p. 296). 



E lOy and E 11 a For Carcinophylloid Clisiophyllid, substitute 



Clisiophyll'um cf. oUongum, Thorns. 



E 126 For Michelinia, mut. towards Beaumontia, read 



Michelinia tenuisepta (PhilL). 



(c) Carlyan Limestone {op. cit. p. 297). 



E14a Add to list :— 



Syriiigopora cf. reticulata, Groldf. 

 Lithostrotion cyathophylloides. Common. 

 *Lithostrotion-like Clisiophyllid. 

 Productus cf. concinims, Sow. 



The fresh material from the Carlyan Limestone suggests that 

 it is, as stratigraphically indicated, a continuation of the megastoma- 

 series. 



Re-examination of the correlation suggested in the 

 Rush paper (p. 300), namely: — 



Eush Slates — Z.^ ; megastoma-heds and Carlyan Limestone — C to S^. 



This correlation depended upon the similar succession of similar 

 coral-faunas, as set out in the following table : — 



^ * The Carboniferous Eocks at Eush (County Dublin) ' Quart. Journ. Geol. 

 See. vol. Ixii (1906) p. 295. 



' ' A Eevision of some Carboniferous Corals ' Geol. Mag. dec. 5, vol. v (1908) 

 p. 28. 



