of Mr. Greenough. 131 



of Shells, another with a different," &c., as Mr. Greenough has 

 the remainder of the passage, in p. 286; but who, by omitting 

 this necessary introduction to his Extract, has contrived to keep 

 it out of view of his Reader, that Mr. Catcot, instead of speak- 

 ing of the means of identifying the same Stratum or Bed in a 

 differe7it and distant part of its course (which is the essence of 

 Mr. Smith's claim on this head) was merely speaking of the means 

 of separating a thick Rock, in some one place, into its component 

 Strata or Beds. 



The extract from the last scientific Letter or Paper which the 

 late Mr. William Martin of Macclesfield wrote, before his death, 

 (and which his friends afterwards sent to be inserted in your Ma- 

 gazine, vol. xxxix. p. 81) has very unfairly towards Mr. Smith, 

 (before he had been mentioned, except on a different account in 

 p. 150, as I shall further mention) been introduced, without the 

 mention of the circumstance, which Mr. Martin candidly acknow- 

 ledges, viz. oUiis having omitted to mention in his printed Work, 

 the connection oi each species of Shell that he had described, with 

 the particular Stratum imbedding the same ; Mr. G. well know- 

 ing, that Mr. Martin had been led to write the passage which he 

 has transferred to his Book, in consequence (fa particular com- 

 mujiication, made by me to Mr. Martin, of Mr. Smith's dis- 

 coveries, and of my applications of the same, to the Strata and 

 places, from whence Mr. M's Specimens had been collected: af- 

 ter the last of his Works, except this Letter, had been printed off : 

 see P.M. vol. liii. p. 113. 



I come now to the short mention which Mr. G. has allowed 

 himself to make of Mr. Sinith, on the subject of Fossil Shells, 

 in p. 287 ; where, apparently for no other reason than to avoid 

 telling the world, that Mr. Smith has published (besides the 

 quarto Memoir explaining his Map) the greater part of two ex- 

 press works on Fossil Shells {besides having deposited his ori- 

 ginal Specimens in the British Museum, which had been almost 

 entirely collected in the last century) — I say, for avoiding saying 

 so much, Mr. G. has descended so Jar as to say, that Mr. Smith's 

 specification of " a variety of Fossils, by which the Strata of Eng- 

 land may (in his opinion) he identified," was made, " in a table 

 attached to his Geological Map." ! ! 



I have already alluded, to the only other instance throughout 

 Mr. G's Work, wherein Mr. Smith is mentioned, which relates, 

 to his discovery, that the hiotvn Alluvia, that is, such water-moved 

 masses of Strata, as, by containing known species of Organic Re- 

 mains (and being frequently also, of a known substance) which can 

 be matched to the partiadar Strata, from whence they were torn, 

 have all (with the exception of some thin and light masses) 

 been moved in one direction, that is, from the SE to the NW, or 

 nearly so: and here again, Mr. G,, as it appears to me, only 



I 2 for 



