Geological Society, C05 



PrRPtrpa of Aclanson, ^n-e-Linnean, 



s= Brnguii-re, 1780. 

 Triton, Montfort, 1810, non Linnteus (Cirripedia), 



= LAMPL'SIA, Schumacher, 1817. 

 Mexeeia, Dunker & Metzger, 1878, non M'Coy (Crustacea), 

 1849. 

 = METZGERIA, Norman, 1879. 

 Sipno, Klein, 2T;-e-Linnean, adopted bylTorch in 1852. 



= TKITOXOFUSUS, Beck, 1847, see Harris, Cat. Austra- 

 lasian Tertiary !Mollusca, British Museum, 1897. 

 The work will be of great service to the student on account of 

 the beautiful plates wliich illustrate the different species. Recent 

 and fossil forms are placed side by side, so tliat comparisons are 

 easily followed out. This is only the first portion, running to 

 200 pages and 24 plates, containing the non-marine shells and 

 marine Gastropoda — we shall look forward with interest to 

 succeeding parts of so important a guide to the Crag Mollusca of 

 this country. 



PROCEEDINGS OF LEARNED SOCIETIES. 

 GEOLOGICAL SOCIETY. 



February 4th, 1914.— Dr. Aubrey Strahan, F.R.S., President, 

 in the Chair. 



The following communication was read : — 



' On the Occurrence of a Giant Dragon-Fl}^ in the Radstock 

 Coal Measures.' By Herbert Bolton, M.Sc, F.R.S.E., F.G.S., 

 Reader in Palajontology in the University of Bristol. 



The wi'iter describes the structure of a wing-fragment found 

 some 3'ears ago upon the Tyning waste-heap at Radstock Colliery 

 (Somerset) by Dr. E. A. Newell Arber, F.G.S. 



The fragment consists of the proximal tliird of a left fore-wing. 

 It is remarkable for its size, being 04 mm. long and 40 mm. broad, 

 the complete vdw<^ having an estimated length of 190 mm., or 1o 

 inches ; the whole insect (with wings extended) must have had a 

 span of over 4(X) mm., or IG inches. 



The anterior wing-margin is strongly tuberculated proximally, 

 and more distally bears a closely-set series of pointed spines directed 

 outwards towards the wing-apex. The hinder wing-margin is also 

 spinous, the spines being a little way inwards from the edge, and 

 possibly serving to interlock the fore and hind wings during flight. 

 The radial and median veins are missing, but the characters of the 

 costa and subcosta on the anterior portion of the wing, and of the 

 cubital and anal veins on the hinder part, show clearly the close 

 relationship of the insect to the members of the family Mega- 

 neuridse, a group including the enormous Mcrjnneura movyi 

 Brongniart, from the Steplianian of Commentry (Allier). The 

 wing is referred to the genus Meffanenra as a new species. The 

 precise horizon from which the shale was derived cannot be deter- 

 mined, as the Tyning waste-heap has received material from five 

 different collieries. 



