246 Proceedings of the Royal Physical Society, 



January 1875.* This completes the history of Adiantites 

 Lindseceformis to this date, so far as I am acquainted with it. 



In the autumn of 1876 Mr Bennie and myself were en- 

 gaged working out the fossil contents of an interesting series 

 of beds exposed along the shore of the Firth of Forth at Abden 

 to the east of Kinghorn, when we w^ere much gratified at find- 

 ing one or two small specimens of A. Lindsemformis, in a bed 

 of shale under the first limestone, east of Kinghorn, in com- 

 pany with a copious marine fauna, and a few other ferns, 

 chiefly sphenopterids. As in the previous instance, this 

 horizon is also in the L. Carboniferous Limestone group. 



I now come to the more immediate object of the present 

 communication, to place on record a second occurrence of the 

 species in Lanarkshire. A short time back, I paid, in com- 

 pany with Dr Traquair, a very pleasant visit to Braidwood, 

 to inspect the Braidwood collection of fossils, brought to- 

 gether by Drs Hunter and Selkirk, by the former of whom 

 we were most hospitably entertained. Amongst some fine 

 plant remains from the Carboniferous Limestone, I was much 

 pleased to find a specimen of our old friend, A. Lindseceformis, 

 obtained by Dr Hunter from the shale below the Main 

 (Hurlet) Limestone, again an horizon in the Lower Carboni- 

 ferous Limestone group. 



All the specimens I have enumerated from the marine 

 portion of our Carboniferous system appear to be in a much 

 less satisfactory state of preservation than the generality of 

 those from the Lower Carboniferous rocks. Although there 

 is some slight difference displayed in the form of the pinnules 

 in the series of specimens, yet I think they all belong to the 

 one species. I do not see any decided points which can be 

 seized upon as separating one from the other, at any rate to 

 no greater extent than that of a variety, certainly not of a 

 specific nature. The pinnules in the specimens from the 

 marine beds are apparently more elongated than in examples 

 from the Wardie shales ; but on examining a number of the 

 latter, I find the form assumed by the pinnules of the former 

 is to be found in the terminal pinnules of the Wardie shales' 

 form. It may perhaps be necessary hereafter to distinguish 



* Trans, and Proc. Bot. Soc. Ediytb., 1875, xii., pt. 2, p. 229. 



