152 PROCEEDINGS COTTESWOLD CLUB 1908 
I—INTRODUCTION 
For some years past one of us has been actively 
engaged in investigating the Inferior Oolite of the West 
of England. Two papers of a series have been published,’ 
and the field-work in connection with two others is well 
advanced. 
During the progress of this work a large number 
of fossils have been collected, and the horizons whence 
they came accurately recorded. Amongst them were 
many echinoids, and it became increasingly clear that the 
majority were restricted to certain horizons, and would 
therefore be valuable in the matter of identifying zones. 
Dr T. Wright, of course, indicated most of horizons 
of the specimens he dealt with in his monograph *; but 
apart from the additional subdivision the Inferior Oolite 
has undergone since his time, thereby rendering some of 
his stratigraphical details of less value, must be added the 
fact that he made a number of erroneous correlations. In 
1904 one of us indicated more precisely in his “ Hand-. 
book to the Geology of Cheltenham and Neighbourhood,” 
the horizons of the specimens that occurred in the 
Cheltenham district, and indeed there is little to add 
to that list on the results of recent work. Concerning it, 
however, there are two points to which attention may be 
drawn. First, Acrosalenza spinosa is there recorded on the 
authority of Wright to occur in the Pea-Grit of Crickley 
Hill, and in his monograph he does not notice it from any 
of the “ Top-Beds.”3 Our experience is that this latter 
r Quart. Journ. Geol. Soc., vol. lxiii. (1907), pp. 383-436 ; zdzd., pp. 437-444. See 
also Geol. Mag., 1907, pp. 82-84. 
2 “A Monograph on the British Fossil Echinodermata from the Oolitic Formations.’ 
Pal. Soc. (1858-80). 
3 pp- 250-251. 
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