288 Reports & Proceedings — Zoological Society of London. 



as well as its range throughout the Lower and Upper Carboniferous 

 Series of Scotland, its occurrence at Settle and Poolvash, and at 

 Tournai as well as Vise. New drawings are given of De Koninck's 

 type-forms. One of these, as also a Scottish example, has the 

 characteristic sinus preserved. The holotypes of the first described 

 species were not originally selected ; that omission is now rectified, 

 with references to the collections in which they are deposited. 



2. " The Microscopic Material of the Bunter Pebble-Beds of 

 Nottinghamshire and its Probable Source of Origin." By Thomas 

 Harris Burton, F.G.S. 



As shown by the distribution of the heavy minerals, combined 

 with (a) the direction of the dip in the cross-bedding, (b) the 

 evidence adduced by boreholes and shaft-sinkings, a main current 

 from the west is indicated. In the neighbourhood of Gorsethorpe 

 this current bifurcated, one division flowing eastwards, the other 

 running south-eastwards. 



A large quantity of the material is derived from metamorphic 

 areas, as shown by the presence of staurolite, shimmer aggregates, 

 microcline, sillimanite, and kyanite. 



The source of the bulk of the material is probably Scotland, and 

 the westward adjoining vanished land, from rocks similar in the 

 main to those of the metamorphic and Torridonian areas known in 

 that country. Minor supplies came from the neighbouring Pennine 

 ridge, and from other surrounding tracts of high land. 



The material was transmitted by means of a north-western river 

 and its tributaries, flowing into the Northern Bunter basin. During 

 certain flood-periods this river overflowed across Derbyshire, carrying 

 its load of sediment, much of which was deposited, as it is now found, 

 in the Pebble-Beds of Nottinghamshire. 



2. llatj 16, 1917, at 5.30 p.m., in lieu of the usual reading of 

 papers a lecture was delivered on " British Geological Maps as 

 a Record of the Advance of Geology", by Thomas Sheppard, 

 M.Sc, F.G.S. The lecture was illustrated by lantern-slides and by 

 an important series of early maps from the Society's Collection. 



Zoological Society of London. 



May 1, 1917.— Dr. A. Smith Woodward, F.R.S., Vice-President, in 



the Chair. 

 The Secretary, Dr. P. Chalmers Mitchell, F.R.S., announced with 

 the deepest regret that Mr. Henry Peavot, the Society's Librarian 

 and Clerk of Publications, had been killed in action. Mr. Peavot 

 had entered the service of the Society in 1896, and, after passing 

 through various departments, was appointed Assistant Librarian and 

 Clerk of Publications in 1908, and was promoted to the post of 

 Librarian and Clerk of Publications in 1912. In every way he had 

 gained the esteem and regard of the Scientific Fellows of the Society, 

 and was one of the most valuable and competent members of the 

 Societv's staff. 



