72 MR SMITH ON THE CHANGES 



One or two valves of the Panopcea Aldobrandi have been 

 found on our shores, one of which in the cabinet of Mr 

 Falconer of Carlowrie is marked " from Yarmouth ;" and 

 in that of Mr Bean of Scarborough, there is a specimen of 

 the same genus, P. Glycemeris, found on the Yorkshire 

 coast ; it is figured in the Nat. Hist. Mag. vol. viii. p. 562. 

 It, however, differs so much in shape, and in the muscular 

 impression, from the one in question, as to render it pro- 

 bable that it is a distinct species. 



A single specimen of this shell was found some years ago 

 on the opposite side of the Firth, near Largs, by Mr W. 

 Struthers. It is possible, therefore, that it may still inha- 

 bit the adjoining sea. Mr G. Forrester of Glasgow, who 

 had it in his possession, tells me, however, that it had no 

 appearance of being recent, and is inclined to think that it 

 belonged to the ancient deposit. The following is a list of 

 the shells we picked up upon this occasion. Those which 

 have been found recent in the Kyles of Bute are marked R, 

 and those which have become extinct or are unknown are 

 marked E. 



Cyprina Islandica. Modiola vulgaris, R. 



Crassina Garensis. Fusus antiquus, R. 



elliptica. Nucula margariticea, R. 



multicostata, E. rostrata. 



Tellina proxima, E. Saxicava rugosa. 

 Pecten opercularis, R. N. S., E. 



Islandicus, E. \ Panopaea Bivonae, E. 



Natica glaucinoides, E. Mya arenaria, R. 

 Balanus costatus. truncata, R. 



Serpula triquetra, R. N. S., E. 



Spirorbis corrugatus. Cardium edule, R. m 



Turbo littoreus,£i?.* Sphenia Swainsoni, R. 

 vinctus. 



In the line of the Greenock and Glasgow railway a sec- 

 tion has been made in a hill between Greenock and Port- 

 Glasgow, which exhibits, in the descending order, the fol- 

 lowing beds : — 



* A single fragment. 



