﻿82 TJPPEE ATONIAN OF THE MIDLAND AEEA. [Feb. I908, 



The top of Z^ subzone was found at the top of the Lower 

 Limestone-Shales, and Horizon y in the middle of the stratified 

 Lower Limestone. There remained about 2750 feet to be accounted 

 for by the three remaining zones. In the Eash sequence on the 

 eastern coast of Ireland, the following thicknesses had been 

 determined by Dr. Yaughau and Dr. Matley : 



Feet. 



Seminula-ZowQ 440 



Syrin^othyris-Zone 870 



1310 



Assuming a somewhat similar succession in Co. Clare, the thickness 

 of the Dibunoj>liylhim-Zone would be about 1440 feet. This hypo- 

 thetical calculation seemed to fit in with the observed faunal 

 succession : the thickness of the limestone in Xorth Clare was 

 about 1500 feet, and appeared to include all three Dihunoj)hyllum- 

 subzones — from the top of the Semimda to the Cyathaxonia- 

 subzone. The speaker also commented on the sudden reappearance 

 of Za^hrentis in the uppermost beds, after dying out at the top of 

 the Zaijhrentis-TiOnQ. 



Prof. E. jr. Garwood congratulated the Author most heartily on 

 the accomplishment of a very successful piece of work. As the- 

 hour was very late, and there was another interesting paper to be 

 read, he would only ask the Author one question. Did he consider 

 the ^CyatJiaxonia-^eds' of his district to be the equivalent of any part 

 of the typical Yoredale Series of the Pennine Chain, as the speaker 

 had recently found Cyathaxonia-Beds above the ' Latissima '-Bed in 

 the typical Yoredale area ? 



The Author thanked the Fellows for the cordial reception given 

 to his paper. He remarked on the interesting nature of Mr. Douglas's 

 brief description of the Carboniferous Limestone in the West of 

 Ireland. Replying to Prof. Garwood's question, he stated that he 

 had no personal acquaintance with the Yoredale sequence : but the 

 discovery in that sequence of CyatJiaxonia-'Bedis above beds with a 

 D^ fauna clearly indicated the equivalence of some part of the 

 Yoredale Series to the Cyaihaxonia-suhzone of the Midland area. 



