167 
and James Philip Kay, M.D., the Albany; were elected Fellows of 
this Society. 
A paper was first read, on the carboniferous and transition rocks 
of Bohemia, by David T. Ansted, Esq., F.G.S. 
After alluding to the difficulties which beset the researches of a 
geologist in a country so little frequented as that visited by himself, 
and noticing the granite and gneiss mountains which constitute the 
south-eastern and south-western boundaries of Bohemia, he proceeds 
to the main object of the memoir. The district described by Mr. 
Ansted is included within a triangle, having the country between 
Luditz and Pilsen for a base, and Prague for its apex; and its struc- 
ture is explained by a series of sections from Luditz to Pilsen— 
Radnitz to Rakonitz—Zebrak to Ginetz—and Przilep to Karlstein, 
all of them being more or less in the dip of the strata. The formations 
composing the district, are granite, gneiss, graywacke, coal mea- 
sures, trap rocks and accumulations of superficial debris. It is stated 
that a line drawn from Eger on the west to Prague on the east 
would completely separate the sedimentary deposits of a newer date 
than the carboniferous system from the coal measures and transi- 
tion rocks ; and that the latter occur only to the south of the line. 
Near Eger is a small local deposit of upper tertiary sandstone, men- 
tioned by Mr. Ansted on account of its containing myriads of fossil 
infusoria cases. 
Section 1. Luditz to Pilsen.—Luditz stands upon a range of round 
topped gneiss hills, but in a depression between two of them, and 
about 3 miles from the town, is a bed of thinly laminated micaceous 
sandstone, containing a few obscure vegetable markings, and believed 
by Mr. Ansted to be a recent deposit. Proceeding in the direction 
of Pilsen, the gneiss is succeeded by a hard cherty stone, considered 
by the author to belong to a rock which underlies the coal mea- 
sures in other parts of the country, but to have been protruded at 
this pomt by igneous agency. The next hill is formed of trap, and 
beyond it, is a bed of similar cherty sandstone, covered up towards 
the S. E. by the red conglomerate on which Manotin is built. To 
the south of this town, slate rocks are finely developed for several 
miles, forming precipitous cliffs, with the strata dipping to the S.E. 
They are covered in part by gravel, and are succeeded by rotten 
shales, assigned by Mr. Ansted to the graywacke system. These shales 
are visible for only a short distance, being superficially replaced by 
a thick covering of gravel, which extends for ten miles. At the end 
of that distance, hills of sandstone commence, and contain near 
Pilsen workable seams of coal. The sandstone is coarsely grained 
and not very coherent ; and the coal bands, which are accompanied 
by shales, are of variable thickness. The dip is very small, and to the 
S. E., but the stratification is totally unconformable with the gray- 
wacke. Pilsen is situated on a little stream, which unites close to 
the town with the Beraun; and the eastern limit of the sandstone 
seems to be a small tongue of coarse grit, which reaches the Beraun, 
and exposes a bed of coal on its western bank. At that point, how- 
