136 Reports and Proceedings — 



had been met witli, and the remains referred to the Diptera were 

 very doubtful. 



The Lias insects, although apparently belonging from their size 

 to a tempex'ate climate, differed from those from Purbeck strata in 

 being less closely allied to European forms, and approaching nearer 

 to those now inhabiting North America. 



On the Continent of Europe a few remains of insects, which had 

 been referred to CarahidcB and CurculionidcB, had been obtained from 

 the Cretaceous strata in the neighbourhood of Aix-la-Chapelle, and 

 a few traces of insects had also been noticed by Dr. Geinitz in the 

 Green sands of Saxony. 



Attention was then drawn to the remains from the Solenhofen 

 slate, which had been referred by Germar, Miinster, Hagen and 

 Giebel to insects belonging to the orders Coleoptera, OrtJioptera, 

 Neuroptera, Hymenoptera, Hemiptera, Lepidoptera and Diptera. The 

 order Neuroptera appeared better represented than any other, and 

 comprised many gigantic species, most of which were referred by 

 Hagen to extinct genera, though some of them were allied to exist- 

 ing American and Australian species. 



From the Lias of Shambelen in the Swiss Alps about 2000 

 specimens had been obtained by Professor Heer, which comprised 

 143 species, 116 of which he had referred to Coleoptera, 7 to 

 Orthoptera, 7 to Neuroptera, 12 to Hemiptera, and 1 to Hymenoptera. 

 The majority of the insects from the Swiss Lias were small like 

 those from British strata of the same period. 



Only five insects appeared to have been found in European 

 Triassic rocks, viz. two species from the Keuper of Vadutz and 

 three species from the Bunter Sandstein' of Trebitz and Salzmunde. 

 In conclusion, allusion was made to certain traces of insects in the 

 Trias of the Connecticut Valley (North America) which had been 

 referred to by Mr. S. H. Scudder. 



Geological Society of London. — I. — January 9, 1878. — Prof. 

 P. Martin Duncan, M.B., F.E.S., President, in the Chair.— The 

 following communications were read : — 



1. "On the Great Flat Lode south of Eedruth and Camborne." 

 By Dr. C. Le Neve Foster, B.A., F.G.S. 



The author described the mode of occurrence of the stanniferous 

 deposit known as the Great Flat Lode, the mines worked in which 

 extend for a distance of S^ miles, and furnish about one- eighth of 

 all the tin raised in Cornwall. The mines in question are Wheal 

 Uny, South Carn Brea, West Wheal Basset, South and West Wheal 

 Frances, South Condurrow, and Wheal Grenville ; and in all the 

 lode dips at a much less angle than the average of Cornish veins, 

 the dip at Wheal Uny being only about 46° S. Throughout the 

 lode contains a small leader, usually only a few inches wide, 

 occupying the space due to the shifting of the two sides of a 

 fissure, and filled partly mechanically, partly chemically. Above or 

 below, or on both sides of this, there is a mass of stanniferous schorl 



1 Vierteljalirssclirift der Naturforscliendeii Gesellschaft in Zurich, Viertes Heft, 

 p. 297, and Heer's Urwelt der Schweiz. 



