239 



existence of similar deposits upon a vast scale in the deep and still 

 waters of the ocean; and considering the English, St. George's and 

 Bristol Channels, to be of the nature of estuaries, he observes, that 

 the arc of the Sector is found encircling the south-western extremity 

 of Ireland on the one hand, and the north-western angle of France on 

 the other, and coinciding with a line along which the water deepens 

 suddenly from one hundred to more than two hundred French fathoms. 



It is then shown that lakes are filled up, not by depositions in 

 their deep, central water, but by the gradual advance of all their 

 lateral terraces and cones. 



IV. — When two streams meet, they neutralize each other's mo- 

 tion, and a deposition takes place at the point of quiescence. 



Peculiar appearances ensue, when streams meet at different levels. 

 If a lateral stream brings down a disproportionate quantity of de- 

 tritus, its bed is raised, but is abruptly terminated by the action 

 of the principal stream. Hence the valleys of mountainous re- 

 gions exhibit not only level terraces formed in lakes, but others the 

 edge of which have a steep declivity. 



Finally, the author presumes that the forms which alluvium puts 

 on in rivers, are produced also in seas, and in the ocean, by the 

 opposition and union of currents flowing either at the same or at 

 different levels. 



A short Memoir was then read, entitled " Remarks on the Ex- 

 istence of Anoplotherium and Palaeotherium in the Lower Fresh- 

 water Formation at Binstead, near Ryde, in the Isle of Wight," by 

 S. P. Pratt, Esq. F.G.S. F.L.S. 



The author lately discovered, in the lower and marly beds of the 

 quarries of Binstead, in the Isle of Wight, and which belong to the 

 lower fresh-water formation, a tooth of an Anoplotherium, and two 

 teeth of the genus Palaeotherium, animals characteristic of strata of 

 the same age in the Paris basin. 



These remains were accompanied, not only by several other frag- 

 ments of the bones of Pachydermata (chiefly in a rolled and in- 

 jured state), but also by the jaw of a new species of Ruminantia, 

 apparently closely allied to the genus Moschus. From the oc- 

 currence of the latter fossil, the author infers that a race of ani- 

 mals existed at this geological epoch, whose habits required that 

 the surface of the earth should have been in a very different state 

 from that which it has been supposed to have presented, in con- 

 sequence of the frequent discovery of the remains of animals who 

 lived almost entirely in marshes. 



Dec. 1. — The Rev. Daniel Pettiward, M.A. of Trinity College, 

 Cambridge ; and John William Bowden, Esq. M.A. of Grosvenor- 

 place, London, were elected Fellows of this Society. 



A paper was read, entitled " An Explanatory Sketch of a 

 Geological Map of Moravia, and the West of Hungary," by Dr. A. 

 Boue, For. Mem. G.S. &c. 



The author in presenting this Map to the Geological Society, 

 states that it has been made with the assistance of Messrs. Teubner, 

 Rittler, and Von Lill von Lilienbach ; and that with the latter 



