"^uraa^FL^S!''] PROCEEDINGS OF SOCIETIES. Ill 



drawn. He also allucled to tlie difficulty with wliicli geologists have 

 hitherto had to contend in explaining the great break in the system 

 between the Cretaceous and Tertiary periods, which recent discovery 

 has in a great measure enabled us to do. Among general specimens 

 exhibited were the shells Bi/thinia tentaculata tyj)e, var. ventricosa, 

 brown and white ; and var. alhida, all from Alum Rock, the last being 

 a new variety, found by Mr. Lloyd, and named last month by Mr. 

 Jeffries ; also, Sphcerium cojiieiim, var. jiavescens, from Plant's Brook, 

 all contributed by Mr. E. M. Lloyd ; and a collection of cones and 

 olives, forming the second part of a series of foreign shells, presented 

 to the Society by Mr. Keen, of Liverpool. 



At a subsequent meeting, Mr. S. Allport also contributed the first 

 instalment of a series of minerals, forming the constituents of igneous 

 and metamorphic rocks ; 1st, the group of Felspars, including speci- 

 mens of Orthoclase, Albite, Oligoclase, and Labradorite, with the 

 varieties Adularia and Sanadine : 2nd, Pyroxenic minerals, comprising 

 Augite, Hornblende, Bronzite, Diallage, Hypersthene, Actinolite, Tre- 

 molite, with Sf)ecimens of Mica, Quartz, Leucite, and Nephelite ; also 

 some of the Zeolites most frequently found in cavities of the older 

 igneous rocks, and the minerals Tourmaline, Epidote, Garnet, Idocrase, 

 Chlorite, and Spodumene. 



Mr. J. Bagnall exhibited Tortula papillosa, and several other mosses, 

 not previously recorded as occurring in the district, and on behalf of 

 Dr. Braithwaite, AndrcBa rupestris and A. obovata, two recent additions 

 to the British Flora, from Glen Callater ; Mr. E. Myers contributed 

 fragments of boulder and wood from Boulder Clay at Sefton Park, 

 near Liverpool, and described the Drift section in which they were 

 exposed; and Mr. E. Simpson laid on .the table thirty species of 

 marine moUusca taken on the coast of Jersey. 



