Correspondence — Dr. 0. Feistmantel. 
431 
both, under the words “ Iron ” and “ Beech,” is intended to suggest that 
the “ Iron Age ” of Western Europe and the “ Beech ” zone of the Danish 
Bogs takes us back about equally far into antiquity ; whilst the position of 
the line under the word “ Bronze,” indicates that the “ Bronze Age ” (still 
of Western Europe) takes us back from the ancient margin of the Beech 
era, through the whole of that of the Pedunculated Oak, and about halfway 
through the era of the Sessile Oak ; and so on in all other cases. 
KENT’S CAYERN. 
PERIODS. 
Deposits. 
Bones. 
Imple - 
ment s. 
Archceo - 
logical. 
Danish- 
Bog. 
Biological. 
Oeographical. 
Climatal. 
Iron. 
Iron. 
Beech. 
Black 
Mould. 
Ovine. 
Bronze. 
Bronze. 
Peduncu- 
lated Oak. 
Reeent. 
Insular. 
Post- 
and (?) 
Sessile Oak. 
Glacial. 
Neolithic. 
Neolithic. 
Scotch Fir. 
Granulär 
Stalagmite. 
Glacial 
and (?) 
Black band. 
Hymnine. 
Palmo- 
li thic 
Flakes. 
Continental. 
Cave-earth. 
Paloeolithic. 
Inter- 
Glacial. 
Crrstalline 
Insular. 
Stalagmite. 
Palfco- 
Ursine. 
lithic 
Continental. 
Breccia. 
Nodules. 
Pre- 
Glaeial. 
coiRiaiEsiPOiiNriDiEirsrciE. 
THE CYCADACEiE IN THE “DAMTJDA SERIES,” AND THENÜRSCHAN 
GAS-COAL OF BOHEMIA. 
Sik, — I wish to send a few lines of explanation in reply to two 
letters which appeared in your Journal for April (pp. 189-191) last, 
which are intended to modify somewhat two Statements in my papers 
previously published in the Geological Magazine (March Number, 
p. 105). With regard to the occurrence of Cycadacece in our Damuda 
series (and the Triassic facies of that series), the fact will be best 
established when I am enabled to publish the descriptions of all the 
fossils in a connected work with figures of all the forms. It will 
then be seen that so long ago as 1850 a true Zamia had been de- 
scribed from Burdwan as Zamia Burdwanensis, M‘Clell. (which, as 
the original shows, is a Pterophyllum). The others have been sub- 
sequently found, although not examined at the time. 
I wish to state that our Nöggerathia, from the Damuda series, does 
