Yol. 59.] HETERASTR^EA RHJETICA. 407 



Bearing in mind the very close relationship between the Upper 

 Bhaetic and Lower Liassic organisms, and the great importance of 

 the ammonite-zones as a means of classification, it may be asked 

 whether the zone of Ammonites planorbis should be taken as the 

 bottom of the Lower Lias, as it most certainly is in many places in 

 Warwickshire, namely at Harbury, Stonythorpe, and Newbold-on- 

 Avon. At the last-named locality I have obtained specimens of 

 Ammonites Johnstoni which were lying directly upon the White 

 Lias, indeed in absolute contact with it, and no question has ever 

 arisen as to the latter being Upper Bhaetic. At Binton, a few 

 miles west of Stratford-on-Avon, I have collected specimens of 

 Ammonites planorbis similarly lying upon the Ostrea-bed, but 110 

 ammonite has ever been found enclosed in it. The discovery of the 

 present species of coral, having a thoroughly Jurassic relationship,, 

 quite low down in the Bhaetic Series tends to emphasize yet 

 further the uncertainty of the division between the Liassic and 

 Bhaetic formations. — July 21st, 1903.'] 



Discussion. 



The Bev. H. H. Winwood expressed his surprise to hear the 

 question of the age of the Sutton-Stone Series brought up again. 

 He thought that controversy was buried long ago. He challenged 

 the statement that the Series contained Bhaetic corals: P. M. Duncan, 

 Charles Moore, and H. W. Bristow had satisfactorily proved that 

 the fauna was Liassic, as at least three characteristic fossils of that 

 formation — namely, Gryphcea incurva, Ostrea liassica, and Lima 

 gigantea — may be traced from bottom to top of those beds. 



•Mr. H. B. Woodward remarked that, as ammonites of the 

 jilanorbis-gr (mp occurred in the Sutton Stone, and had been found 

 by the previous speaker in equivalent beds of like character at 

 Shepton Mallet, he could not understand the grouping proposed by 

 the Author. 



The Bev. J. F. Blake said he thought that the Liassic age of the 

 Sutton Stone had long ago been determined. 



