﻿Yol. 64.] IN THE CAEB0NIFER0U3 EOCKS AT LOUGHSHINNY. 443 



glomerate is due to the fact that the sequence of physiographical 

 conditions was identical in the two areas. For example, just as 

 MicheMnia occurs in the conglomerate of Eush, so the same genus 

 is one of the very few corals that occur in the Mid-Avonian 

 dolomite of the Bristol area.) 



(4) The Cyathaxonia- and Fosidonomya-Bed?^ — Dg and P. 



(E 17, R 21, and R IS of the Rush paper ; and R 22, R 23, L 3/, 

 and L 4 to L 9 of the present paper.) 



Locally, this series may be usefully subdivided into the following 

 ascending sequence : — 



f D^ri' ZapJirentis aff. Enniskillem. 

 1 (Clisiophyllicls common.) 



D„. Subzoneof Cyathaxonia rushian a. J. ^ n^r- i ?■ ■ ^ 

 ^ ^ D3J. Michehma tenuisepta. 



I (Clisiophyllicls rare.) 



DP. A phase characterized by a Cyathophylloid Lithostrotion. 



Poszdonomya Bechep L' & Productus striatus. 



glabra, sp. nor. [ ^p^ P. Glyphioceras spirale. 



(4 a) Fauna of Ds^ (R 17, R 21, and R 18 of the 

 Rush paper). 



(See faunal resume, op. cit. p. 301.) ^ 



The fauna closely resembles that of the Dibunophyllum and 

 Curkeen Beds (D.^). 



The following fossils do not pass up (locally) into higher beds. 



Corals : 



Clisiophyllids of several types. 



Caninoid and simple Koninckophylloid Campoyhylla. 



Lithostrotion of the L. -Martini type. 



Brachiopods: 



The typical forms of Froductus corrugatus and Fr, hemisphericus, 



Spirifer striatus and varieties. 



The typical forms of Athyris glahristria. 



Leptcena analoga and varieties, 



ZapTirentis aff. Ennislcilleni is rare, but links this division with 



the D2-3 beds of the Gower peninsula. 

 Cyatliaoconia rushiana links D-sa with D35, and passes on, in a 



narrow mutation, into P. 

 Densiphyllvm rushianum and Syringothyris subconica also 



pass up. 



