g6 PEOCEEDINGS OF THE GEOLOGICAL SOCIETT. 



Many of these minerals are crowded with microliths, which, there 



is reason to believe, consist of pyroxene. 



DiSCTJSSIOM-. 



The Peesident spoke of the difficulty of adequately placing so 

 elaborate a paper before the Meeting in the absence of the Author. 



Mr. EiTTLET had heard sufficient to appreciate its importance. 

 There were many points of interest, especially those relating to 

 periclase, a mineral almost, if not exclusively, confined to this 

 district. It was interesting to know of its hydration and passage 

 into brucite. 



Mr. Teall spoke of the special interest attaching to the beha- 

 viour of limestone blocks in the presence of igneous masses. He 

 referred to the presence of idocrase in the Coniston Limestone near 

 Shap. He alluded to a communication recently made by Mierisch, 

 published in Tschermak's ' Mittheilungen,' where similar phenomena 

 were recorded. 



The following specimens were exhibited : — 



Specimens of Elephas meridionalis from Dewlish, Dorset, and of 

 the deposit in which they were found, exhibited by the Eev. 0. 

 Pisher, M.A. F.G.S., in illustration of his paper. 



A collection of similar specimens from the same deposit, and pho- 

 tographs, exhibited by J. C. Man sel-Pley dell, Esq., P.G.S. 



Right lower molar of JElephas antiquus from Whittlesea, Cam- 

 bridge, exhibited by Prof. T. M^Kenny Hughes, M.A., F.G.S. 



Specimens exhibited by John Spencer, Esq., E.G.S., in illustration 

 of his paper. 



Microscopic slides exhibited by Miss Margaret I. Gardiner, in 

 illustration of her paper. 



Eock-specimens and microscopic sections exhibited by E. Eutley, 

 Esq., E.G.S., in illustration of his paper. 



Eock-specimens and microscopic sections exhibited by H. J. John- 

 ston-Lavis, M.D., E.G.S., in illustration of his paper. 



