57 
Of the variety 6 1 have several calcareous specimeus 
from the Chicksgrove quarry, one of them lined with 
equiaxed rhombs of calcareous spar, for which I am in- 
debted to A. B. Lambert, Esq. of botanical celebrity; in 
the stone imbedding this shell there was a large conge- 
ries of Serpule, of a different species from those in the 
other specimen var. z, an Oyster shell, impregnated with 
Silex, Trigoniz, various small Shelis, smal! Vertebra, 
and imperfect Crab’s claws. Most of the siliceous speci- 
mens are also of the variety @. FT am indebted to Mr. 
Salmon for some masses of Flint, having hollows almost 
filled with calcedony, which appear to be nearly oblite- 
rated chambers of sucha shell, of a very large size: they 
were found in Marlborough Downs. 
Some years ago I saw on the shore at the foot of the 
Ciifis, between Dover and Walmer castle, an impression 
in Chalk, of an Ammonite, which measured about three 
feet in diameter. 
Chicksgrove quarry produces many Ammonites, they 
occur in a Limestene, into the composition of which a 
small quantity of fine sand enters, and as there are dis- 
persed through it many portions of crystallized Carbo- 
nate of Lime, that break into lamine, it has, I am told, 
been erreneously called sandstone with mica: the quarry 
men term the particular bed which produced my largest 
specimen var. «, the spangle bed, (the specimen var. 6 ap- 
pears to be from the same bed) from the appearance of 
these crystals. Miss Benett who has paid indefatigable 
attention to Chicksgrove quarry, and indeed to Geology 
in general, has kindly remitted to me the following ac- 
count of the section, with the nomenclature of the peo- 
ple who work the stene, and aseries of specimens which 
enable me to mark the mineralogical differences of the 
stones. 
