Reports & Proceedings — Geological Society of London. 283 



a distance of 6£ miles along the valley and 2\ miles across it. The 

 section at Hedge Lane, Lower Edmonton, shows several thick, and 

 for the most part undisturbed, Arctic plant-beds, which occur in 

 a deep Drift-filled channel. The relative levels and stratigraphy 

 point to the conclusion that the Hedge Lane deposits belong to 

 a slightly earlier stage of the Low Terrace River Drift than the 

 deposits of Ponder's End. Broadly speaking, they undoubtedly 

 belong to the same group. 



The author suggests that it would be a practical convenience if the 

 East Anglian word ' platymore ' were adopted for the underlying 

 eroded floor of country rock beneath a later accumulation of Drift. 

 The importance of this ' platymore ' surface in the correlation of 

 Drift deposits has been increasingly recognized during recent years, 

 and it seems desirable that it should have a name. 



The author supports the correctness of the view that the lower 

 river-terraces are later than the higher river-terraces. Further 

 evidence is also brought forward in support of his view that the 

 Arctic deposits form an integral part of the Low Terrace Drift : 

 that is to say, that they belong to the latest stages in the Pleistocene 

 erosion of the valley, and are not remnants of earlier deposits. 



One of the sections described appears to suggest that the climate 

 became nearly as temperate as that of the present day before the 

 mammoth and woolly rhinoceros became extinct. 



2. April 28, 1915.— Dr. A. Smith Woodward, F.R.S., President, 



in the Chair. 



The President announced the death, on April 16, of Richard 

 Lydekker, who became a Fellow of the Society in 1883, and 

 resigned only on December 16 last. He referred to the value of 

 Mr. Lydekker's contributions to geology, and also to his services 

 to the Society. Mr. Lydekker had been a Member of Council for 

 fifteen years, and a Vice-President for four years. 



The following communications were read : — 



1. "A Composite Gneiss near Barna in the County of Galway." 

 By Professor Grenville A. J. Cole, F.G.S., M.R.I.A., Director of the 

 Geological Survey of Ireland. 



The great mass of granite west of Galway town is seen on its 

 northern margin to be intrusive in a metamorphosed series of Dalradian 

 quartzites, limestones, and mica-schists, and has received a foliation 

 which is parallel with the bedding of this series; this foliation is 

 ascribed by the author to the partial absorption of sheets of the bedded 

 series into its mass. Traces of similar intermingling occur in Town- 

 parks (Galway town) and west of Barna. At Furbogh Bridge the 

 granite contains pink crystals of orthoclase, at times 10 cm. long in 

 the direction of the vertical axis, and these have become stranded, as 

 it were, among the foliation planes of dark-green biotite-schist, into 

 which they were carried by an intimate intermingling of the granite, 

 with the schist into which it flowed. Quartz and smaller felspar- 

 ervstals from the granite abound in the resulting composite gneiss, 



