468 Notices of Memoirs— R. G. Bell— St. Erth Beds. 



Section D. — Biology. 



Discussion on the arrangement of Museums (in conjunction with 

 Section C), Opened by Dr. H. Woodward, F.E.S., F.G.S. 



Section E. — Geography. 

 W. Brindley, — A Visit to the Porphyry Quarries of Gebel Dukhan. 

 Second Eeport of a Committee for inquiring into the depth of the 



permanently frozen soil in the Polar Eegions. 

 Prof. Boyd DaivMns. — The beginning of the Geography of Great 



Britain. 

 G. Skelton Streeter. — The Euby Mines of Burma. 

 Josiali Pierce, jun. — On the United States Geographical and Geological 



Survey. 



Section F. — Economic Science and Statistics. 



W. Topley. — On the Future Production of the Precious Metals (at a 



Joint Meeting with Section C). 



Section G. — Mechanical Science. 

 JeremiaTi Head. — The Iron Mines of Bilbao. 

 F. Ransome. — Portland Cement Manufacture. 

 T. A. TFalker.—Qevevn Tunnel. 



Section H. — Anthropology. 

 Sydney B. J. SJcertchly. — On the Occurrence of Stone Mortars in the 



Ancient (Pliocene ?) Eiver Gravels of Butte County, California. 

 Eeport of the Committee on the Pre-historic Inhabitants of the 



British Isles. 

 Dr. Henry Hicks. — The Migrations of Pre-glacial Man. 

 Br. H. Galley Marsli. — The Early Neolithic Floor of East Lancashire. 

 W. Pengelly. — On Eecent Eesearches in Bench Cavern, Brisham, 



Devon. 



Papers Eead at the Meeting of the British Association, Manchester, in 

 Section (C), Geology. 



II. — The Pliocene Beds of St. Erth, Cornwall. By Egbert 

 George Bell, F.G.S. 



QINCE the publication of the paper read before the Geological 

 lO Society of London in February, 1886, a good deal of work 

 relating to the geological surroundings and to the special fauna of 

 the deposit has been undertaken. Considerable excavations were 

 made, and much examination given to the sands and clays, with the 

 result that the section given on p. 202, " Quarterly Journal of 

 Geological Society," for May, 1886, was completely verified. 



The clay deposit is not, however, uniformly fossiliferous, nor is it 

 uniform in the distribution of its fossil contents as a rule. Ceritliia 

 are found in great numbers at the base of the blue clay, while the 

 larger Nassce and Turritellce are generally distributed in that bed. 

 A great feature of interest is the large number of the smaller species 

 of mollusca, especially of Gasteropods, which embrace more than 

 three-fourths of the total amount. 



