APPENDIX A. 



Since the concluding pages as well as the index to this Monograph have been printed, 

 some additional information has been obtained, which, I think, had better be recorded, 

 and I must again apologise for being obliged to add a second appendix to this 

 Monograph. 



SCOTLAND. 



During his summer excursions Mr. James Thomson, of Glasgow, was induced to examine 

 some portions of Cantire or Kintyre, and in Tirfergus Glen, four and a half miles 

 south-south-west from Campbeltown, he discovered Carboniferous Limestone, much 

 altered by heat, and tilted up by an extensive outburst of trap on one side 

 and of porphyry on the other. 1 In this Carboniferous rock thirty-five species of 

 Mollusca have been discovered by Mr. Thomson, among which are the fol- 

 lowing Brachiopoda: — Athyris ambigua, Sp. Urii, Bit. plcurodon, Strep, crenis- 

 tria and var. radialis, Prod, latissimus, P. semireticulatus, P. costatns and 

 var. muricatus, P. scabricidits, P. acideaias, P. longispinus, and Choitetes 

 Hardrensis— thirteen species. 



ENGLAND and WALES. 



Mr. D. C. Davies, of Oswestry, has obtained the following additional species in the 

 north-west of Shropshire and in Denbighshire : 2 



1 These beds, until the last few years, were thought to belong to the Liassic formation, but they have 

 been tinted as Carboniferous in Prof. Nichols's new geological map of Scotland, as well as in that recently 

 published by Sir R. Murchison and Mr. Geikie. 



2 Much information relative to the geology of these two counties will be found in Mr. D. C. Davies's 

 interesting paper published in the ' Oswestry Advertiser and Montgomeryshire Mercury ' for June 12th, 

 1861. 



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