504 proceedings of xhe geologicax sociexY. [June 11, 



row, and are to be seen before the tertiary and some of the 

 secondary and primary septa. 



The specimen is coloured light red ; the outside is smooth ; and 

 the calice is admirably preserved. 



It is probably a remanie fossil from the uppermost beds of the 

 Chalk, traces of which still remain in the neighbourhod of Xorwich, 

 and which have yielded a fine series of large simple corals*. 



Discussion. 



Mr. Charlesworth made some comments on the difficulty of 

 ascertaining the exact locality at which Crag fossils were found. 

 He mentioned that in former years he had found Cretaceous fossils 

 in the Crag ; but, from the matrix they contained, he had deter- 

 mined them to be derivative. He commented at some length on the 

 liability to erroneous conclusions which might result to palaeontology 

 from this intermixture of remains belonging to different periods, 

 and also on the errors which arose from too great a tendency to 

 regard • fossils as derivative when, like the cetotolites of the Crag, 

 they actually belongerl to the beds in which they occurred. He re- 

 garded the coral as derivative. 



3. On the Cephalopoda-bed and the Oolite Sands of Dorset and 

 j>art of Somerset. By James Buckman, Esq., F.L.S., F.G.S. 



[Abstract!.] 



In this paper the author discussed the true position of certain beds 

 containing abundant remains of Cephalopoda, found in various 

 parts of the Jurassic region of this country, and of the sand} 7 bed 

 underlying the inferior Oolite at Cleeve Hill and other places 

 (called by Prof. Phillips the " Midford Sands"), which has been 

 regarded by most authors as belonging to the Lias. From an in- 

 vestigation of the Cephalopoda-bed in quarries at Bradford Abbas 

 in Dorsetshire, the author comes to the conclusion that it is quite 

 distinct from the Cephalopoda-bed of Gloucestershire, and that it is 

 the representative of the Bubbly Oolite at the top of Leckhampton 

 Hill and Cold Comfort, and of the Gryphite and Tngonia-beds of 

 the neighbourhood of Cheltenham. The Gloucestershire Cephalo- 

 poda-bed he regards as situated close to the bottom of the Inferior 

 Oolite series ; and this is also the position to which he refers the 

 sandy beds above mentioned. 



Discussion. 



Prof. Duncan, though accepting zones as useful in stratigraphical 

 arrangement, agreed with the author that they could not be used 

 for fixing hard and fast lines of demarcation. 



* Described in the Supplement to the Brit. Foss. Coral?, Pala'ontographical 

 Society's Memoirs, vol. xxii. 



f The publication of this paper is deferred. 



