140 Reports and Proceedings — Geological Society of London. 



Geological Society of London. 



I. — January 23, 1901.— J. J. H. Teall, Esq., M.A., F.E.S., 



President, in the Chair. 



After the formal business had been taken, the President, 

 having requested all those present to rise from their seats, said : 



" I feel sure that the Fellows will desire to express their 

 deep sense of the grievous loss which this nation has sustained 

 in the death of our late beloved and most gracious Sovereign, 

 by assenting to the immediate adjournment of the meeting." 



The meeting was accordingly adjourned. 



II.— February 6, 1901.— J. J. H. Teall, Esq., M. A., F.E.S., President, 



in the Chair. 



Dr. P. A. Bather, in exhibiting rock specimens, microscope 

 sections, and photographs illustrating blavierite, ophitic diabase, 

 falsi tic porphyry, petro-siliceous breccia, and other igneous and 

 metamorphic rocks of the Mayenne, said that the specimens had 

 been collected by him in the course of an excursion of the Eighth 

 International Geological Congress, under the guidance of M. D. P. 

 Oehlert. In the basins of Laval and Coevrons were many peculiar 

 rocks due to the folding and crushing of stratified rocks penetrated 

 by eruptive dykes. The tectonic features were illustrated by the 

 maps of M. Oehlert and by the photographs. The slides were 

 prepared in the Mineralogical Department of the Natural History 

 Museum, where all the specimens would be preserved. 



Mr. E. T. Newton exhibited some graptolites, which had been 

 obtained by Mr. Herbert J. Jessop in the course of a prospecting 

 expedition in Eastern Peru. The locality was in lat. 13° 40' S. and 

 long. 72° 20' W. ; Limbani, near Crucero, in the neighbourhood 

 of the Eio Inambari. The graptolites are closely related to 

 Diplogj-aptus foliaceus, and indicate deposits of late Ordovician age. 



Mr. A. K. Coomara-Swamy exhibited and commented on a lantern 

 slide showing spherulitic structure in sulphanilic acid. This had 

 been described and figured by Mr. Henry Bassett, Jun., in the 

 Geological Magazine for January, 1901, pp. 14-16. 



The following communications were read : — 



1. " On the Structure and Affinitiesof the Ehjetic Vlant JVaiadita." 

 By Miss Igerna B. J. Sollas, B.Sc, Newnham College, Cambridge. 

 (Communicated by Professor W. J. Sollas, M.A., D.Sc, LL.D., 

 F.E.S., V.P.G.S.) 



This plant, the remains of which are found in Gloucestershire, 

 was considered to be a monocotyledon by Buckman, but a moss by 

 Starkie Gardner. Material supplied by Mr. Seward and Mr. Wickes 

 has given the authoress ground for the belief that Naiadita is an 

 aquatic lycopod, and that it is the earliest recorded example of 



