176 Mr. Bakewell's Section and Geological Map. 



Investigation, will furnish Mr. S. with well selected specimens 

 of all these Orthocera, from as many and as distant places as 

 niay be, mentioning- their exact localities and strata, by their 

 ordinary and local names, in order that the same may in due 

 course ap])ear, in his very useful work, unmixed with Geognostic 

 speculations and dibtinctions, which may greatly impair, but 

 cannot add to the value of coloured figures and a descriptive enu- 

 meration of British Fossil Shells, with their habitats. 



But to return to the first article in your last Number, I beg to 

 congratulate Mr. Bakewell on the very superior account of the 

 Northumberland and Durham strata, which he has presented, to 

 vour Readers ; and to tliank him for the very liberal manner in 

 which lie has brought Mr. Forster's worlv^#)efore the public*, 

 and which I hope that we shall see reiterated in the forth-coming 

 Edition of his Geology. And consistently with the opinion that 

 I have long ago expressed to your Readers, of ihc zisefulness of 

 Mr. B's Geological writings (andwhicli, from being less Geogno- 

 stical and Plutonkal, will I trust further improve hereafter), I 

 beg to make a few hirther remarks on his late paper, with a view 

 only of adding to its truth and usefulness. 



It will be recollected, that I objected to Mr. Bakewell's Geo- 

 logical Map of England, in his Geology, 1st Edition, as at- 

 tempting a greater simplification than nature admitted ; at that 

 time Mr. B. did not extend his " Low district" far enough north 

 in Yorkshire (as I observed, P. M. xlii. p. 57), but now on the 

 contrary, he seems to have extended this uppermost of his three 

 divisions, too far in that direction, when he intimates, at p. 82, 

 that the yellow Limestone (extending far into Northumberland) 

 is to be classed with the strata that prevail "on the eastern 

 side of England t ;" notwithstanding that this Rock so evidently 

 helongs to the Red Marl, which is nowhere admitted into Mr. B's 

 hnv district, N of Leicester; but even the Bath Oalite, far above 

 it, is excluded a place therein, in Mr. B's Map, in the vicinity 

 of Bath, and thence southwju'd. 



The grand Fault which I have supposed to range SW and NE 

 from near Ainderby-Steeple to near Rcdcar in Yorkshire, (P. iSL 



* I have very often qiiiited, and reconimendod tlie sale of Mr. Forster's 

 Book;l)iir unfortunately, it is not sold hut at ]\'ewcast/e, whence I Irave 

 procured it, for three or four of my friends. I beg also to mention, with 

 the view of serving Mr. F. that if he would cause it to be advertised and 

 sold in London, it would soon be more souiiht after; and from a similar 

 motive- I will mention also, that the Binder employed to do up his Work iu 

 Boards, most rcprehcnsibly omits sewing therein, so that all the copies I 

 have seen, were no s'>oner cut, but the middle of each sheet became loose 

 and ready to fall out. 



t In p;m^ 93, Mr. B. expressly says, that the Sunderland Limestone ex- 

 tends " through the sout/i-eastcrn Counties," but which surely is unfounded. 



xxxix. 



