Reports and Proceedings — Geological Society of London. 329 



II. — May 22nd, 1901. — J. J. H. Teall, Esq., M.A., V.P.E.S., 

 President, in the Chair. 



Mr. George Abbott, in exhibiting some specimens of Cellular 

 Limestone from the Permian beds at Fnlwell, 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, yet 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 hypothecated force. Each class appeal's 

 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 

 attempted to classify the different patterns, nor had anyone, except 

 Mr. William King, in his work on " Permian Fossils," offered any 

 theory as to the formation of this cellular structure in the Magnesiaa 

 Limestone. (See Prof. Gr.A. J. Cole's letter, Geol. Mag., April, p. 187.) 



The following communications were read : — 



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

 Deposits of Hundes (Tibet)." By Richard Lydekker, Esq. 



Twenty years ago the author proposed the provisional name of 

 Pantholops Himdesiemis for an extinct species of antelope typified 

 by an imperfect skull figured in Eoyle's " Botany, etc., of the 

 Himalaya Mountains," pi. iii, fig. 1. The specimen is in the 

 Museum of the Geological Society, and an examination has confirmed 

 the original determination. The skull, although of rather smaller 

 dimensions, comes very close to that of the existing chiru {Pantholops 

 Eodgsoni) of Tibet in general form of brain-case, in the strong ridges 

 marking the upper limits of the temporal fossae, and in the contour 

 of the occipital surface. The horn-cores have the same highly 

 elliptical cross-section, and the same general setting-on and upright 

 direction. The fossil apparently came from the horizontal deposits 

 of Hundes, and its age is probably not greater than Upper Pliocene. 



2. " On the Occurrence of Silurian (?) Rocks in Forfarshire and 

 Kincardineshire along the Eastern Border of the Highlands." By 

 George Barrow, Esq., F.G.S. (Communicated by permission of the 

 Director of H.M. Geological Survey.) 



These rocks occur in three lenticular strips between the schistose 

 rocks of the Highlands and the boundary-fault next the Old Red 

 Sandstone. The largest is about 20 miles long, and extends almost 

 from Cortachy to beyond the Clattering Bridge; it is about f mile 

 wide at its widest. The rocks are divided into two groups : the 

 Jasper and Green Rock Series below and the younger Margie Series 



