36 PROCEEDINGS OF THE 



Sixth — The vegetable, or surface soil. 



In the second bed above referred to, there appear to be two 

 kinds of laminated clay. The lower is of a reddish brown colour, 

 and is a good workable clay with stones in it, some of them being 

 from 7 to 10 pounds in weight, but the greater number are only 

 from 1 to 2 pounds. Resting on this is a fine laminated blueish- 

 grey clay, difficult to work, with fewer stones in it, these being 

 also considerably smaller in size. 



I have been particular in describing this clay, in consequence 

 of a reference to it in a passage in the "Glacial Drift of Scotland,"* 

 by Professor Geikie, which reads thus : — '^'It retains throughout 

 the same colour, the same impalpable unctuous texture, and fine 

 lamination. Its freedom from stones is remarkable. Nowhere 

 have I seen a single pebble in it. Mr Macbride, who has been 

 looking at it for years, has been equally unsuccessful, and the 

 workmen at the Kilchattan tile-works assured me they had never 

 seen a single stone in this lower or brick clay." 



During repeated visits to Kilchattan, and close examination of 

 this particular bed, I am satisfied that what I have above stated 

 describes its true composition, and that stones are to be found in 

 it by all who diligently search for them. 



List of Fossils found in Kilchattan Clay-beds. 



PISCES. 



Small vertehrce and scales, - Not determined. 



CONCHIFERA. 



Anomia ephippium, Linn., - - Two good specimens. 



Peden Islandicus, Miill., - - Fragments. 



. Cyprina Islandica, Linn,, - - Common and large. 



My a truncata, Linn., - - - Common. 



Cardium edule, Linn., - - - One large valve. 



echinatum, Linn., - - Two valves fry. 



Pkolas crispata, Linn., - - - Fragment. 



Tellina calcarea, Cliemn., - - Very Common. 



Madra subtruncata, Da Costa, Seven valves. 



Axinus flexuosus, ----- Common. 



* Transactions of the Geol, Soc. of Glasgow. Vol. I., Part II., page 133. 



