552 



MR. E. E. L. DIXON AND DR. A. VAUGHAN ON [Nov. I9II, 



' black lias' rock-facies, which are poorly exposed on the foreshore. 

 Prom these beds we obtained Productus longispinus Sow., var., 

 Sjoirifer bisulcatus Sow., var., and Martinia glabra (Mart.), var., 

 identical in form with the same varieties from Oystermouth. 

 Hence it is clear that the D 2 _ 3 fauna is, in part at least, later 

 than that of the D 2 massive limestones. 



It is also interesting to observe that Productus scabriculo-costatus 

 does not come in at Port Eynon until the very top of the D 2 lime- 

 stones, and that, in the Bristol Area on the east and at Kidwelly 

 and Pendine on the west, the same form is first met with above 

 the typical D 2 and immediately below the Millstone Grit. 



(iv) From the shales at the ' paint-mine,' near Port Eynon, we 

 obtained the following fossils (identified by Dr. Wheelton Hind): — 



Posidon&mya becheri (Bronn). 

 Posidoniella la vis (Brown)? 



Glyphioceras reticulation (Phill.). 

 Glyphioceras bilinyue (Salter). 



Dr. Hind suggests that, here, we are ' fairly low down in the 

 Pendleside Series.' Since these shales are faulted against the 

 limestone, it is impossible to ascertain their precise position strati- 

 graphically ; it can, however, be safely assumed that they lie above 

 the ' black lias ' of the foreshore at Port Eynon. 



This record, taken in conjunction with the fossils cited from the 

 shales at Bishopston, demonstrates that a Pendleside Phase occurs 

 above the D 2 _ 3 Phase, just as it does above the Cyathaxonia Beds 

 (D 3 ) of County "Dublin. 



Table correlating the Upper Avonian of Gower, Bristol, 

 and Rush (County Dublin). 



Bristol. 



GOWEE. 



Rush and Loughshinny 

 (Co. Dublin). 



' Millstone Grit.' 



Pendleside. 



P. 



a D 2-3' 



s 



D 2 . 







c 



* D,. 



D (' Cyathaxonia ' Beds). 



D (' DibunopJiT/llum' Beds). 



d,. 2 . : 



?.- 



+3 



D,. 



Ph l 



D,- 



Unknow 11. 



The correlation of the Bristol and Gower sequences with 

 those of Northumberland, Yorkshire, North Wales, the Midlands, 

 etc., is given in the British Association Report, 1909 (Winnipeg), 

 on Lower Carboniferous Zones, p. 1 87. 



