XCvi PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [Aug. I9OI, 



May 22nd, 1901. 

 J. J. H. Teall, Esq., M.A., V.P.E,.S., President, in the Chair. 



The List of Donations to the Library was read. 



Mr. George Abbott, in exhibiting some specimens of Cellular 

 Limestone from the Permian beds at Pulwell, Sunderland, 

 which he proposed to present to the British Museum (Natural 

 History), remarked that their interest depended upon the assumption 

 that they were entirely inorganic. Although showing a remarkable 

 resemblance to corals, j^et no zoologist or geologist had yet claimed 

 them as organic. If this surmise were correct, the carbonate- of- 

 lime-molecules — probably when amorphous — must have had some 

 inherent molecular directive force which produced the 

 numerous distinct patterns in their structure. These fall into 

 four distinct classes : — honeycomb (two kinds), coralloid, and 

 pseudo-organic, the last-named being remarkable for having 

 a constant discoidal shape, and therefore those of this class must 

 have had their external form also controlled by the hypothetical 

 force. Each class appears to have passed through four stages of 

 ' growth ' and to have undergone some marvellous rearrangements 

 of the particles while in the solid condition. So far as he knew, 

 no one had previously attem])ted to classify the different patterns, 

 nor had anyone, except William King, in his work on ' Permian 

 Fossils,' offered any theory as to the formation of this cellular 

 structure in the Magnesian Limestone. 



The following communications were read : — 



1. 'On the Skull of a Chiru-like Antelope from the Ossiferous 

 Deposits of Hundes (Tibet).' By Bichard Lydekker, Esq., B.A., 

 E.B.S., F.G.S. 



2. ' On the Occurrence of Silurian [?] Bocks in Forfarshire and 

 Kincardineshire along the Eastern Border of the Highlands.' By 

 George Barrow, Esq., F.G.S. ^ 



3. ' On the Crush-Conglomerates of Argyllshire.' By J. B. Hill, 

 Esq., B.N.^ (Communicated by B. S. Herries, Esq., M.A., Sec.G.S.) 



In addition to the specimens described above, the following 

 specimens and map were exhibited : — 



Skull of a Chiru-like Antelope from the Ossiferous Deposits of 

 Hundes (Tibet), from the Geological Society's Museum, and a 

 Skull of a recent Antelope, exhibited by B. Lydekker, Esq., B.A., 

 F.R.S., F.G.S. , in illustration of his paper. 



Bock-specimens and Microscope-sections, exhibited by G. Barrow, 

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



^ Communicated by permission of the Director of H.M. Geological Survey. 



