Yol. 69.] BATHONIAN ROCKS OF THE OXFORD DISTRICT. 513- 



Dr. A. M. Davies said that lie only knew the fringe of the district 

 described, but was impressed with the resemblance of many of 

 the specimens and microscopic sections exhibited to those obtained 

 from corresponding strata in the Calvert boring. The rarity of 

 ammonites in the Cornbrash had been mentioned ; yet he had 

 obtained several examples of Clydoniceras from ."Blackthorn Hill. 



Mr. J. Pringle remarked that he was interested in the Fritwell- 

 Ardley section described by the Author. During the progress of 

 the excavations he (the speaker) had examined the beds in company 

 with Mr. George Barrow. The measurements obtained did not 

 appear, however, to coincide very closely with those given by the 

 Author. 



The Author thanked the Fellows present for the reception given 

 to his paper. Then, in reply to Mr. Buckman's letter, he said that, 

 with reference to the expression that no definite zones could be 

 formulated, he intended to convey the idea that no single fosbil had 

 a sufficiently restricted range. With regard to the term ' Concinna 

 Beds,' he w-ould be very glad to substitute the term ' Inoccrmmts- 

 obliquus Beds ' ; but he had adopted the designation ' Conchoid 

 Beds,' since that term had been already used for these beds. In 

 reply to Dr. Davies, he said that the absence of Cornbrash was 

 exceedingly interesting : he would have rather expected the Forest 

 Marble to be absent. 



