456 
The entrochal limestones of Derbyshire, & c. have their anti- 
quity manifested by their original deep situation, and by the peculiar 
fossils which they contain. These are the entrochi and other encrinal 
remains , so much dwelt on in the second of these volumes. With 
these remains of different species of encrini, these limestones are in 
some parts, and to a very wide extent, entirely filled. In the lime- 
stone of Dudley, in Worcestershire, they are accompanied by a tuhi- 
porites (the chain-coral), and some beautiful minute flustritee and 
milleporitas, none of which, any more than the encrinus itself, are ever 
seen in any of the superincumbent strata. Of this animal, indeed, it 
may, I believe, be said decidedly, that it must have been lost ever 
since the formation of these very ancient strata. 
Respecting the stratification of Bradford, near Bath, where we have 
seen that the pear encrinite , Yol. II. p. 208, has been so plentifully 
found, I have no authority to speak decidedly : I have, however, little 
doubt, that it would be found to be a portion of a lifted stratum, 
whose original situation was beneath the blue Lias. As has been 
just observed respecting the Derbyshire species, so it may be here 
observed, that no remains of this species have been found in any of 
the superior strata. Nor has any recent animal been found that could 
be placed in the same genus with the animals to which these remains 
belonged. 
Above these strata are those of the alternating coal shales and 
grit-stones ; and on these is disposed a stratum of red marl. 
Over this is a stratum of sand ; but neither in this nor the preceding 
stratum does it appear that any fossils have been noticed. 
The lias clay is the next superior stratum, and contains beds of 
limestone called the blue and the white lias limestone. This 
stratum has its continuity most decidedly evinced ; it appearing on 
the coast of Dorsetshire, and ranging through the island, is again 
seen on the northern coast. 
The fossils of this stratum are exceedingly numerous, and some of 
