350 Subdivisions of the Paleozoic Strata of Great Britain. 
lished sequence of the British deposits to the consistency of a 
newly adopted foreign name. On this account we have, I think, 
been premature in using the term Permian to define a British 
series, which appears not to be quite co-ordinate with the Per- 
mian series of Russia. The English type is in fact better, for 
the purpose of European comparison, than the Russian; and 
where we have a good and unambiguous English type it is an 
injurious anomaly, in the present condition of our nomenclature, 
to introduce a foreign name into the English series.* 
In the south of England the whole series is sometimes repre- 
sented by a mass of conglomerate. In central England, War- 
wickshire, &c., it is represented by a coarse red sandstone, some 
beds of which become calcareous; and the whole group is con- 
formable to, and appears to pass into, the coal-measures. About 
the commencement of the Triassic period, these Permian sand- 
stones underwent contortions along with the coal-strata; in con- 
sequence of which we see, in Warwickshire, the upper ‘Triassic 
groups resting discordantly upon the inclined beds of these sand- 
stones. 
In conclusion we may remark,— ; 
. That it is not in all cases an easy matter to draw a clear 
line between this series and the carboniferous. Thus Mr. W. 
Smith, in his old geological map of Yorkshire, considers the 
lowest group (No. 5) as one of the coal-measures. ‘The series 
most frequently commences with a discordancy of position and 
a co-ordinate change of organic types. With limited exceptions, 
the flora and fauna of the Permian groups differ from those 0 
the Carboniferous period. 
. The several groups of the series admit of a very close com- 
parison with the Rothe-todte-liezende, the Kupferschiefer, and 
the Zechstein, &c. of Germany. . 
General Conclusions. 
On casting the eye over the above short Synopsis, or Tabular 
View, of the whole Palxozoic series, several conclusions seem to 
force themselves on any well-informed reader: and I will enu- 
nerate them here, though they involve a partial repetition of 
what has been stated above. A more detailed discussion of them 
will, I hope, before long form the subject of another essay. 
_ First. There is a frequent difficulty in separating the collec- 
tive groups, such as the Cambrian, Silurian, Devonian, &c., by 
* The nt nomenclature of the British groups, from the oldest Palaozoic to 
the newest halen! f is essentially geographic and local. The Pomfret Series would 
a far less ambi nam: i i 
ne Permian. The name Pomfret series (or system) would moreover co 
the nomenclat i ‘ 
shire, 1821. We have, however, done right in adopting one foreign 
s; because in that part of the general series the English type is singularly de- 
