334 Localities of Fossil Shells 



all such Shells, which up to that time I had discovered. Since 

 then, many others liave been shown to be multistratular Shells, 

 as I have mentione<l, in the introductory' remarks to my stra- 

 tigraphical Indexes to the thiid and fourth volumes of Mr. S.'s 

 Min. Conch. ; and as soon as leisure will permit, it is my in- 

 tention, further to complete this List; incorporatuig it, per- 

 haps, in a general List of Fossil Shells, with the stratigraphical 

 and geographical localities of each. 



In the mean time, I beg to entreat the co-operation of those 

 Gentlemen or Ladies, whose settled or occasional residence in 

 the Country, may enable them, to collect, considerable num- 

 bers of the multistratular Shells, that they would intrust such to 

 Messrs. Sowerby, with the exact locality marked on each Shell ; 

 in order to enable them to enter minutely into the characters 

 peculiar to those of each distinct Stratum. 



I beg to remark here, to those Writers who may attempt 

 the identification of the Strata in distant Places or Countries, 

 by means of the Fossil Shells found in such distant parts, (as 

 it appears to have become rather fashionable to do,) that it is 

 useless, and calculated only to mislead, to place dependance 

 on a list of Genera, to which the Shells may respectively be 

 referable: even the Species of Shells, determined as roughly, 

 or with no more attention to minutiae than has been usual, are 

 inadequate tests wherebj' to determine certainly the identity 

 of Strata; unless, through the concurrence of considerable 

 numbers of such Species: or unless the succession of Strata, of 

 the same or closely allied kinds, and the imbedding of other 

 extraneous matters besides Shells, can be bj'ought in aid of 

 the attempt made to identify Strata by means of a few Species 

 of Shells they may respectively entomb, in two distant Places. 



In the following List, where Shells in the previous Lists, 

 have been referred to more than one Stratmn near a Place, 

 I have here brought forwards the particulars of only such 

 Strata as have received additions of Shells in this fourth 

 volume. I am, &c. 



John Farey. 



Places mentiofied. in Vol. IV. o/"SowErvBY's Mineral Con- 

 chology: each refen-ed to its proper Stratum in Mi- 

 Smith's Series of' Strata, and in his Maps, Sections afid Geo- 

 logical Tables. 



Adlington Hills, Kent, see vol. 52, p. 350, 1 species, in Port- 

 land Rock (Sand). 



Gryphaea sinuata, t 336. 



Aldbo- 



