386 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [Apr. 24, 



fragile shells also would have been comminuted, — a condition that 

 does not always obtain in the Till, as for instance in the case of the 

 Turrit ella terehra. The author thought, however, that the condition 

 in which small shells and fragments of larger shells, of kmds similar to 

 those of the Till, are found in the stomach of the Cat-fish {Anarrhicas 

 lupus), common on our coasts, would be a likely explanation of the 

 condition in which the shells of the Till are usually foimd. 



Note 071 the Shells found in the Till by Mr. Cleghorn. By 

 James Smith, Esq., of Jordan Hill, F.G.S. 



The shells are much broken and water-worn ; I could only identify 

 the following species : — 



Dentalium entale, Gmel. sp. 



Saxicava rugosa, Linn. sp. 



Mva truncata, Linn. (var. Uddeyallensis) . 



Telliua proxima. Brown. 



sohdula, Penn. 



Cyprina Islaudica, Linn. sp. 

 Astarte Garensis, Smith. 



T\'ithami, Smith. 



— ■ borealis, Linn. 



Cardium edule, Linn. 



echinatum, Linn. 



TmTitella terebra, Linn. sp. 



2. Oji the Occurrence 0/ Marine Shells in the Stratified Beds 

 BELOW the Till. By James Smith, Esq., of Jordan Hill, 

 F.G.S. With a notice of the Occurrence of Marine Shells 

 in the Till. By J. C. Moore, Esq., Sec. G.S. 



In the basin of the Clyde, the Till or unstratified boulder clay 

 generally rests upon the beds of the coal formation, or upon rocks of 

 an earlier date ; and these subjacent rocks are almost always fractured 

 where they are in contact with the Till. There are however excep- 

 tions ; sometimes the Till rests upon scratched but unbroken surfaces 

 of those rocks ; and sometimes, but very rarely, we find immediately 

 below the Till beds of sand, gravel, and laminated clay, — fragments 

 apparently of an older alluvial covering, which has not been entirely 

 removed by the cause, whatever it was, which lodged the Till on the 

 surface. 



Until the discovery which I am about to communicate, no marine 

 remains had been found in the beds imderlying the Till. We had 

 therefore no direct evidence to prove that those beds are of the same 

 age as the deposits which he above them. 



Having been informed by Mr. John Craig, F.G.S., that a bed of 

 shells had been discovered near Airdrie, much higher than any pre- 

 viously found in Scotland, I considered it of importance to ascertain 

 the exact amount of the elevation above the present level of the 



