Rev. P. B. Brodie on the Lower Lias at Barrow-on-Soar. 31 



the surfaces of these shells for the punctations indicative of true 

 perforations, or that (as he himself suggests) his punctated shell, 

 though resembling Sp. cuspidata in external characters, really 

 belongs to a different genus. I trust that I shall be able, ere 

 long, to clear up this part of the question, Mr. Davidson having 

 written to request that Mr, Meek will send me chips of his 

 punctated Spirifera, and that Prof. Winchell will send me chips 

 of a shell belonging to his genus Syringothyris. When I shall 

 have examined these, I shall report to you the results without 

 delay. 



I remain, Gentlemen, 



Your obedient Servant, 



William B. Carpenter. 



P.S. — Mr. Davidson permits me to add the following extract 

 from a note which he has written to me after perusing the 

 above : — " I have always placed the most implicit reliance on 

 your admirable observations on the shell-structure of the Brachio- 

 poda, and therefore, as far as I am personally concerned, would 

 not have required the additional confirmation given by your 

 recent researches; but I am not sorry that you should have 

 again investigated the matter, as it can but strengthen the value 

 of your discoveries, — and the more so, as I have always found 

 this shell-structure to be combined with internal modifications, 

 so that a perforated species could, not be generically the same as 

 an imperforate one. This has now been observed in so many 

 instances, that the supposed exceptions brought forward by 

 Messrs. Meek and King are, no doubt, the result of incorrect 

 observation. To make this clear to the public was therefore a 

 matter of some importance, and I am very glad you have done 

 so.'' 



University of London, Burlington House. 

 Dec. 10, 1866. 



VII. — On the Correlation of the Lower Lias at Barrow-on-Soar, 

 in Leicestershire, with the same Strata in Warwickshire j JVor- 

 cestershire, and Gloucestershire ; and on the occurrence of the 

 remains of Insects at Barrow and in Yorkshire. By the Rev. 

 P. B. Brodie, M.A., F.G.S.* 



As ray friend Professor Jukes has already described the Lower 

 Lias at Barrow and the neighbourhood in Potter's Charnwood 

 Forest, it will merely be necessary thus briefly to refer to his 

 account ; but I shall draw attention to one section not given by 



* Communicated by the Author, having been read at the Meeting of 

 the British Association in Nottingham, August 1866. 



