Reports and Proceedings — Geological Society of London. 237 



to the composition of the complex, namely, as bands or lenticles of 

 rocks, now hornblendic, representing distinct intrusions enveloped 

 and modified by the later and more voluminous invasion of acid magma. 



The chief conclusions which the author wishes to establish are : — 



(i) That the highly disturbed region of the North-West Highlands, 

 already known to extend into the south-eastern part of Skye, is 

 further prolonged into the Isle of Eum. 



(ii) That at numerous places along the disturbed belt which 

 borders the principal mountain group of the island, the Tertiary 

 plutonic intrusions assume the character of well-banded gneisses, 

 comprising alterations of different lithological types. 



(iii) That these complex gneisses were formed mainly by fluxion 

 in a heterogeneous mass, the heterogeneity being due to the 

 inclusion and incorporation in a granitic magma of relics of ultra- 

 basic and basic rocks. 



II. — March 25th, 1903. — Professor Charles Lap worth, LL.D., 

 F.E.S., President, in the Chair. The following communications 

 were read : — 



1. " On a New Species of Solenopsis from the Pendleside Series 

 of Hodder Place, Stonyhurst (Lancashire)." By Wheelton Hind, 

 M.D., F.E.C.S., F.G.S. 



This specimen of a perfect left valve was found by the Rev. 

 Charles Hildreth in shales belonging to the Pendleside Series, 

 which have yielded the following fossils : PhilUpsia Van-der- 

 Grachtii, Ph. Polleni, Prolecanites compressiis, Glyptoceras spirale, 

 Gl. reticulatum, Gl. platylobium, Orthoceras anniilosolineatum, Posido- 

 nomya Becheri, Solenopsis major, and a few Brachiopods. 



2. "Note on some Dictyonema-like Organisms from the Pendleside 

 Series of Pendle Hill and Poolvash." By Wheelton Hind, M.D., 

 F.R.C.S., F.G.S. 



Mr. D. Tate discovered a specimen, in the shales and limestones 

 in the Angram Brook, which had some resemblance to a Dictyonema ; 

 and he afterwards found another similar specimen, on or about the 

 same horizon, at Poolvash. These are referred to distinct species, 

 and doubtfully assigned to the genus Dictyonema. A piece of shale 

 from the Bishopton Beds in Glamorganshire has somewhat similar 

 but less distinctly reticulate markings. 



3. " The Geology of Tintagel and Davidstow District (Northern 

 Cornwall)." By John Parkinson, Esq., F.G.S. 



The country described and mapped consists of some 22 square 

 miles in Northern Cornwall, extending from the coast eastward 

 towards Camelford Station and St. Clether. In the eastern part 

 it extends to the neighbourhood of the Brown Willy mass of 

 granite, while on the north it approaches the boundary between 

 the Lower Culm and the Upper Devonian. The rocks described 

 are of the latter age, and contain Spirifera disjuncta. 



Except in the southern coast region (Tintagel and Trebarwith 

 Strand) the strike is fairly uniform in an east-south-easterly and 

 west-north-westerly direction, the beds having a northerly dip ; 



