174 Reports and Proceedings. 



the Silurians, and consist of 14 genera and 20 species. Of these 

 Pentamerus ohlongus and Pentamerus lens are the rarest, and Atrypa 

 heraispherica the most plentiful. The Mountain Limestone fossils 

 are represented by 15 genera and 27 species : making a total from 

 the two formations of 29 genera and 47 species. 



I have, as the readiest means of giving the necessary information, 

 prepared the following list of these fossils, as determined by Mr. 

 Salter, F.G.S., who writes to me, "It is extraordinary that there 

 should be only Corals, Crinoids, and Brachiopods — no Cephalopoda, 

 no Gasteropoda, except Dentalium. Such collections show the 

 •variable character in particular localities, even of such a homogeneous 

 deposit as the Carboniferous Limestone : " — 

 Mat Hill Sandstone. 



Pentamerus oblongus, rare. 



lens, rare. 



Atrypa hemispherica, plentiful. 



reticularis, var. 



Spirifer crispus and trapezoidalis. 

 Strophomena depressa. 



cotnpressa. 



pecten. 



Pterinea demissa. 

 Euomphalus sculptus. 



Orthis elegantula. 

 Holopea. 



Holopella otsoleta. 

 Palaeocyclus praeacutus, 

 Halysites catenulatus. 

 Petraia subduplicata. 



var. crenulata. 



Phacops Weaveri 

 Tentaculites Anglicus. 



Mountain Limestone. 



Producta concinna. 



mesoloba? 



Streptorhyncus crenistria, 2 var. 

 Spirifer triangularis. 

 — — — bisulcatus. 

 octoplicatua. 



Chonetes variolata. 



Hardrensis. 



Dentalium ingens. 



Poteriocrinus crassus, and otber species. 



Ehodocrinus. 



Actinociinus. 



Platycrinus. 



Lithostrotion irregulare and Martini. 



Michelinia megastoma. 



Zaphrentis, 2 or 3 specimens. 



Syringopora reticulata. 



Fenestella plebeia. 



Phillipsia, part of tail. 



Producta semireticulata. 



In what direction from this point are the parent rocks situated 

 which furnished these pebbles and fossils, and in what manner were 

 they transported from thence to the position they now occupy ? An 

 examination of geological maps of the British Isles leads to the con- 

 clusion that the original source of these beds was north and west of 

 the point in question, and probably in a large tract of country 

 now forming part of tho bed of the North Sea and Atlantic Ocean, 



These bunter beds have themselves at varioxis times been subjected 

 to considerable denudation. They enter largely into the composition 

 of the water- worn stones of the Keuper series, and also contribute more 

 than any other formation to the gravels of the Trent Valley. Origi- 

 nally they must have covered an area of many thousand square miles, 

 and even now, after enduring successive periods of submergence and 

 abrasion, they contribute in no slight or uninteresting degree to the 

 picturesque character of our inland scenery. — Staffordshire Advertiser. 



Bath Natural Histoet and Antiquarian Clubs. — At a meeting 

 held in January, Mr. E. B. Crickitt read a paper on "The Hot 



