322 DR. C. A. MATLEY AND DK. A. VATJGHAN [May I906, 



Plate XXX. 



Avonian Corals and Brachiopods from Rush. 



Figs. 1, 1 a, & 1 b. Lithostrotion cyathophylloides, sp. nov. (p. 319). 



Fig. 1. Calicular view (showing the columella cresting a conical tabula) ; 

 natural size. Rllg. Meyastoma-Beds ; coast-section, Rush. 

 1 a. Horizontal section ; slightly enlarged. R 11 a. Megastoma-Beds ; 

 coast-section, Rush. 



1 b. A mutation. Horizontal section ; X 1*2. Curkeen Limestone, 



Curkeen. 

 Figs. 2 & 2 a. Clisiophyllum curkeenense, sp. nov. (p. 320). 



Fig. 2. Horizontal section ; slightly enlarged. Curkeen Limestone ; 

 Curkeen. 



2 a. A less-specialized variant. Horizontal section ; slightly enlarged. 



Rlla. Meyastoma-Beds ; coast-section, Rush. 

 Figs. 3, 4, & 5. Complex structural types cited in the faunal lists. 



Fig. 3. Carcinophylloid ClisiophyUum. Horizontal section ; slightly 

 enlarged. R 10 j. Meyasto?na-Beds ; coast-section. Rush. 



4. Campophyllid. Horizontal section; slightly enlarged. R17b. 



Cyathaxonia-Beds ; coast-section, Rush. 



5. Cymatiophylloid Clisiophyllid. Horizontal section ; slightly 



enlarged. R 21 h. Cyatkaxonia-Beds ; coast-section, Rush. 

 Fig. 6. Productus cf. fimbriatus (p. 308). Pedic]e- valve ; slightly enlarged. 

 R12b. Top of Meyastoma-Beds ; coast-section, Rush. 

 7. Syrinyothyris subconica (Martin) (p. 311). Pedicle-valve; natural size. 

 R21d. Cyathaxonia-Beds ; coast-section, Rush. 



Discussion. 



The President congratulated the Authors on this very interesting 

 paper, and felt that it must be a source of gratification to Dr. Vaughan 

 to see that his classification, founded upon study of the Bristol area, 

 was being applied to an ever-widening tract. He was interested in 

 many of the structures which had been projected on the lantern- 

 screen : they certainly reminded him of structures seen among the 

 knoll-like masses of limestone described by Mr. Tiddeman in 

 the West Riding of Yorkshire. 



Mr. Gr. W. Lamplugh, from personal experience of the section, 

 heartily congratulated the Authors on their success in interpreting 

 its intricacies. The classification of the Carboniferous Limestone in 

 Ireland, based hitherto on lithological characters, stood in much 

 need of revision under modern methods* of research. The coast 

 between Rush and Skerries offered the most favourable section 

 known to the speaker for the first stages of this work ; and he was 

 delighted when Dr. Matley undertook the task, being assured that 

 valuable results might be expected. The present paper justified 

 this expectation, and promised well for the further results to be 

 obtained from the remaining portion of the section, between Lough- 

 shinny and Skerries. He particularly hoped that this further work 

 would demonstrate beyond doubt whether the Bush Conglomerates 

 and the Skerries Conglomerates do actually represent two distinct 

 and widely-separated horizons, as Jukes believed, since on this 

 matter the interpretation of the structure of this Carboniferous 

 basin largely hinged. 



Mr. W. A. E. Ussher thought that the photographs exhibited 



