350 Localities of Fossil Shells, 
Shells and Coralites, which under the same Name, either Mr. 
Sowerby or Mr. Smith, have referred to more than one Stratum: 
which List I shall in a few days transmit to you, for insertion in 
your Work, accompanied by some Remarks, on the use and im- 
portance of the knowledge of Fossil Shells, in conducting Geo- 
logical investigations * : it may however be proper here to no- 
tice the other corrections following, viz. p. 215, dele the 3d line, 
beginning with Ditto :—p. 217, p. 20 and 21, for Blue Marl 
above the Lias, read, Green sand: |, 32, before Terebratula ob- 
soleta, insert Ditto, in Clunch Clay lower part:—p. 218, 1. 7 and 
8, after Goat-acre, insert 35 m. NNE of Calne; and dele, under 
the great Bath Oolite:—I. 10 from bottom, after in, insert Oak- 
tree Clay, below. p. 220, under Longleat, imsert Pecten quadri- 
costata, t. 56, f. 1 and 2 (=<1./2aud 3 fom bottom, dele, or Mel- 
burg :—and p. 224, |. 11, for great, read, under. I am, 
Your obedient humble servant, 
Howland-strect, Oct. 10, 1818. ~ Joun Farey Sen. 
An alphabetical List of the Places from whence Fossit SHELLS 
have been obtained by Mr. Jamus SowErRey, and described 
in Vol.11. of Min. Concu: each referred to its proper Stra- 
TUM in Mr. Smitn’s Series and Map. 
Adlington Hills (N of Romney Marsh), 10 m. W of Folkstone, 
Kent, in Portland Rock. 
Gryphea dilatata, var. 6 tal. 149, f. 2. 
Aldborough, see vol. 46, p. 212, 2 species of Shells, in Crag Marl. 
Tellina obliqua, t. 161, m. | Voluta Lamberti, t. 129, f.3. 
Amberley-Heath, +m. SW of Minchin-Hampton, .Glouc. in 
Forest Marble. 
Patella rugosa, t. 139, f. 6. 
Aswarby, near, 34 S of Sleaford, Lincolnshire, in Cornbrash 
Limestone. 
Ammonites Herveyi «, t. 195, u. 
Aynhoe, see vol. 46, p. 212, 4 species, in Fullers’-earth Rock. 
Ostrea acuminata y, t. 135, f. 3. 
* T was not unmindful of the promise made at the end of my first Index, 
(P. M. vol. 46, p. 224,) and repeated p. 285, as to preparing a Paper on 
Fossil Shells, intended for your Work: just as [ had finished the same, Sir 
Richard Phillips undertook, at my request, to give some account in his 
“« Monthly Magazine,” (see vol. xl. p. 379) of my Friend Mr. Smith’s Map 
of the Strata, and Memoir, for which purpose I lent him my Copies of the 
same: and thinking that the Paper I had drawn up, and addressed but not 
sent to you, would somewhat explain to Sir R. the nature and objects of 
those Works on Fossil Shells, which my friend Smith intended publishing, 
I lent this mannscript (retaining no copy) with Smith's Map, and never got 
it back again: it was pr etended to have been sent to me by the Two-penny 
Post. 
Babling- 
