Mr. Farey’s Notes on Mr. Bakewell’s Geology. 259 
P. 60, |. 3, Fresh-water fish*.—* Who has told us, any in- 
dubitable marks, by which fresh and salt water 
fish, or those of water of any other qualities can 
be discriminated?, among the primitive races 
whose remains we find in the strata. I believe 
no one has, or can, P. M. xxxv. p. 134. Some 
time ago I asked a celebrated Naturalist this ques- 
tion,—he said, he knew no other characteristic 
distinction between fresh and salt water shells, 
than the thinness of the former, but will this 
serve as any distinction among fossil species? are 
not very thick and stout shells often mixed in the 
same bed with very thin and tender ones ?—TI have 
often seen it. This being at present a favourite 
Geological bauble, in London as well as Paris, 
(Rep. i. and P. M. xxxv. p. 256) Mr. B. has in 
seven or more pages of his Book, contrived to 
introduce so fashionable a subject, combined as 
often with his mistake, about the remains of large 
Quadrupeds being found in the stratified Clay of 
London, instead of upon it, see my Notes on pages 
16, 181,8c.—See Mr. James Sowerby’sconcluding 
remark in p. 76 of his * Mineral Conchology.” 
1.6 and 7. 1 Clay. @ Sand #.—t It is much to be 
lamented, that Mr. B. has so far suffered Theory 
to distort facts, as to deny the many important re- 
gular strata of Clay and of Sand in the south- 
eastern parts of England(Rep.i. 111 to 115),a place 
among his secondary strata; placing them here 
among alluvial substances, viz. with Gravel, and 
calcareous Tufa, and even with beds of Peat !. 
1, 22, some time established ¢.—t Mr. B’s work was 
intended, we should hope, as ** introductory” to 
the truths of Science, and not for detailing and 
giving further currency to established errors. If 
Mr. B. at all thought, with me, (as this passage 
intimates I think) that the boasted arrangements 
of Lehman (p. vt.) were useless, if not herttul 
to the science, (see my Note on page 44) why 
have they formed so large a share of his work, 
with additional and speculative arrangements of 
his own, on the same doubtful principles? 
6), 1.6, forced through *.—* It is more natural, and 
accordant with all the facts, to suppose the su- 
perior strata have been denudated off the moun- 
tain tops of Granite (such as a in fig. 1, plate I), 
R2 than 
