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IX. 



THE LOWER PALiEOZOIC ROCKS OE POMEROY. 



By WILLIAM G. FEARI^SIDES, M.A., E.G.S., Fellow of Sidney 

 Sussex College, Cambridge ; GERTRUDE L. ELLES, D.Sc, 

 late Geoffrey Fellow of Newnham College, Cambridge ; and 

 BER^^ARD SMITH, M.A., F.G.S., Sidney Sussex College, 

 Cambridge. 



Plates VII., VIII. 



Read Februauy 28. Ordered for Publication Makch 20. 

 Published July 16, 1907. 



Attracted by the magnificent fossils of this remote district, and 

 realizing that there was some divergence of opinion as to the age of 

 the beds containing them, some Cambridge geologists in 1905 agreed 

 to attempt the working out of the structure of the area, and the 

 correlation of the beds there represented. 



The field-party consisted of the present authors, together with 

 Miss I. L. Slater, of jS'ewnham College, and Mr. A. McDougall, of 

 Christ's College ; and its work was done during the pleasant and 

 unusually dry summer season of June and July, 1905. We desire to 

 express our gratitude to Prof. G. A. J. Cole, for his kindness in 

 facilitating our work in every way. 



During the field-work. Miss Elles, as palaeontologist, made 

 approximate determinations of the all-important Graptolites, while 

 Mr. Fearnsides plotted localities, sections, and structural details upon 

 the six-inch map. In the collecting all took an equal share. The 

 material so obtained was taken to Cambridge, and has since been 

 worked over by the authors of the present communication. The 

 Graptolites have been studied by Miss Elles ; the Trilobites and other 

 fossils have been, as far as possible, identified by Mr. Smith, who is 

 also responsible for the drawing and reduction of the field-map to its 

 present form. All notes, tables, &c., so prepared were then given 



K.I. A. PROC, VOL. XXVI., SEC. B. N 



