I46 PROCEEDINGS OP THE GEOLOGICAL SOCIETY. [Aug. 1 894, 



Mr. Ltdekkee exhibited some specimens from a collection of 

 Argentine fossil Vertebrates which he had been allowed to select 

 from the La Plata Museum for presentation by Dr. Moreno to the 

 British Museum. Many of these belonged to types previously 

 quite unrepresented in the collection of the latter. He also drew 

 attention to his recently published monograph on Argentine Verte- 

 brates, and stated that he hoped these results of his journey to La 

 Plata under the auspices of the Royal Society would be regarded as 

 satisfactory. The difficulty he himself had laboured under, in 

 endeavouring to understand what had been previously written in 

 regard to the extinct mammals of Argentina, was largely due to the 

 absence of satisfactory figures ; and his object had, therefore, been 

 to figure as many specimens as possible on a large scale, in order 

 that others might have an opportunity of judging for themselves, 

 quite apart from his own descriptions and conclusions. 



He had undertaken his journey to Argentina somewhat un- 

 willingly, at the wish of Sir W. H. Flower and Mr. Sclater ; but he 

 had been so interested in what he had seen, that he hoped means 

 might be afforded him of repeating his visit this year. 



The following communications were read : — 



1. 'Carrock Fell: a Study in the Variation of Igneous Rock- 

 masses. — Part I. The Gabbro.' By Alfred Harker, Esq., M.A., 

 F.G.S. 



2. ' The Geology of Monte Chaberton.' By A. M. Davies, Esq., 

 B.Sc, F.G.S., and J. W. Gregory, D.Sc, F.G.S. 



3. ' Cone-in-Cone. How it occurs in the Devonian (?) Series 

 in Pennsylvania, U.S.A., with further details of its Structure, 

 Varieties, etc.' By W. S. Gresley, Esq., F.G.S. 



In addition to the specimens described by Mr. Lydekker (see 

 above) the following were exhibited : — 



Rock-specimens and microscope-sections, exhibited by Alfred 

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



Specimens and microscope-sections, exhibited by A. M. Davies, 

 Esq., B.Sc, F.G.S., and Dr. J. W. Gregory, F.G.S., in illustration 

 of their paper. 



Flint-implements, etc., from Bournemouth, Christchurch, Wells 

 (Norfolk), and Shoreham (Kent), exhibited by the Rev. R. Ashing- 

 ton BuUen, B.A., F.G.S. 



Specimen of Lazulite from Madagascar, exhibited on behalf of the 

 Rev. Richard Baron by W. W. Watts, Esq., M.A., F.G.S. 



