328 [i'roc. B.N.F.C, 



Triassic deposits of our district were devoid of fossil remains. 

 Above the Trias were found the Rhaetic beds from which the 

 following fossils had been collected : — A vicula contorta, 

 Modiola minima, and Pecten valoniensis. Liassic rocks were 

 found on the southern side of Cavehill, the best exposures 

 being in the bed of C'arr's Glen, where the beds belong to the 

 Ammonites planorbis zone — the lowest of the ammonite zones 

 of the Lower Lias. From this zone he had obtained the fol- 

 lowing fossils: — Vertebrae of Ichthyosaurus, Ammonites 

 planorbis, Cardinia ovalis, Lima pectenoides, Ostrea liassica, 

 and Pseudodiadema lobatum (Wright). This last-named 

 fossil was new to our district, and had first been recorded by 

 the lecturer. The Upper Ctetaceous rocks showed great 

 variety of composition and yielded many fossil remains. Some 

 of his finds proved records for the first time — namely, Ostrea 

 diluviana from the yellow sands and Belemnitella quadrata 

 fr©m th« nodular band. The Cretaceous beds here exposed 

 showed five divisions, each marked by special lithological and 

 palaeontological features. Their ascending order of sequence 

 was — 1st, Glauconitic sands; 2nd, Yellow sands; 3rd, Chlp- 

 ritic sands and sandstones; 4th, Chloritic chalk, the basement 

 bed of the overlying No. 5; — the White chalk. Mr. Bell dej, 

 scribed these beds in detail, and exhibited many fossils whicli 

 he had collected therefrom. Proceeding, the speaker de- 

 scribed how he found for the first time a '' flint factory " on 

 the side of Squire's Hill. Subsequent searches proved the 

 existence of similar manufactories at Crow Glen and above 

 Wolfhill, instances which had not been recorded before. 



The President, Messrs. W. Gray, M.R.I.A., R. Welch, 

 C. M. Cunningham, L.D.S., and W. J. C. Tomlinson took part 

 "in the discussion which followed. 



" ORIGIN AND GROWTH OF AGATE AND 

 CHALCEDONY." 



The second paper, " The Origin and Growth of Agate 

 and Chalcedony," was read by Mr. J. Strachan, who said: — 

 The prettily banded and coloured siliceous stones called 



