44 Reports and Proceedings — 



author furnishes a list of all recognized fossils from the island, 

 concluding with notes on certain limestones, including a Globigerina^ 

 limestone and one containing Girvanella. 



IL— December 5th. 1894.— Dr. Henry Woodward, F.E.S., Presi- 

 dent, in the Chair. The following communications were read : — 



1. " Supplementary Note on the Narborough district (Leicester- 

 shire)." By T. G. Bonney, D.Sc, LL.D., F.K.S., F.G.S., Professor 

 of Geology and Mineralogy in University College, London. 



The author revisited this district, briefly described by himself and 

 Mr. Hill in 1878, at Easter 1893, and in September 1894. The old 

 excavations had been greatly enlarged, but little of importance had 

 been disclosed: no dykes and no new junctions with sedimentary 

 rocks. But the crystalline rocks have been recently struck in a fresh 

 locality between Narborough and Huncote, about half a mile west of 

 the pit near the former village. As in that case, the rock lay very 

 near to the surface ; here the highest part of the boss was barely 

 covered. The rock is hardly to be distinguished from that of the 

 .Narborough pit. The enlargement of the pit south of Enderby has 

 exposed fresh sections of the junction of the slate and syenite, which 

 has been now traced along the whole length of the pit from north to 

 south, and some particulars are added to the former description. 



The enlargement of certain of the pits has displayed some interest- 

 ing sections of Boulder-clay resting upon the crystalline rocks. The 

 latter are not appreciably ice-worn. The fragments in the Boulder- 

 clay, identified by the author, were from the Carboniferous, Trias, 

 Jurassic (especially Lias), and Upper Cretaceous formations. They 

 indicated, in the main, a drift from a more or less north-easterly 

 direction. 



2. " The Tarns of Lakeland." By J. E. Marr, Esq., M.A., F.R.S., 

 Seo.G.S. 



The author has examined several tarns of the English Lake 

 District. In those cases where the stream issues from the tarn over 

 solid rock, he finds either (1) direct evidence that the tarn results 

 from the blocking up of part of a pre-existing valley by drift, 

 causing the deflection of the water to a direction different from that 

 of the original stream in this locality ; or (2) evidence which is 

 perfectly consistent with such an explanation of the origin of the 

 tarn. 



Under the circumstances he would submit that tarns cannot be 

 assumed to lie in rock-basins simply because the issuing stream flows 

 over solid rook (and this assumption has been made), but that those 

 who maintain the existence of such rock-basins must prove the 

 occurrence of solid rock entirely around the tarn. 



3. " Description of a New Instrument for surveying by the aid of 

 Photography, with some Observations upon the Applicability of the 

 Instrument to Geological Purposes." By J. Bridges Lee, Esq., 

 M.A., F.G.S. 



The instrument described in this paper consists essentially of 

 a photographic camera fitted inside with a magnetic needle, which 



