108 Proceedings of the Royal Physical Society. 



would appear to indicate a quiet estuary, or creek bottom, 

 where fossilisation took place, as the MoUusca lived accom- 

 panied by little or no disturbance. At another visit to the 

 Scrobicularia beds, in company with Mr James Bennie (of the 

 Geological Survey), the foregoing facts and a large suit of 

 specimens were obtained. Some slight difference exists be- 

 tween the details of this section as here given, and as stated 

 by Mr Brown ; but this can be easily accounted for without 

 difficulty. 



On proceeding a short distance down the burn we come to 

 the point of its embouchment into an open, alluvial flat par- 

 tially submerged at high tide, and having on each side, east 

 and west, the fine raised beach-beds forming escarpments of 

 20 feet or more. This section is shown to the greatest ad- 

 vantage on the east side, almost directly west of Kincraig 

 farm house, visible on the rise in the distance. I quite agree 

 with Mr Brown in placing these raised beach-beds above the 

 foregoing Scrobicularia beds, for, although, as he justly says, 

 no direct junction can be seen,* still from the fact that the 

 latter have a seaward dip, and so pass out of sight going down 

 the burn, I do not think there can be much doubt of the 

 accuracy of his conclusions. This is the section visible — 



1. Blown sand, with land and marine shells, 2 to 3 feet. 



2. Laminated sand and shelly debris, with several distinct 

 alternating layers of shells, usually whole, and pebbles, and 

 partially rounded stones, about 3 to 4 feet, each layer mixed 

 with a certain proportion of sandy matter. The MoUusca 

 are in a beautiful state of preservation, and many of the bi- 

 valves have the valves in apposition. 



3. Laminated sand, with here and there a little cross bed- 

 ding ; the laminae consist of both coarse and fine sand, with 

 occasional partings of comminuted coal shale, and a few small 

 pebbles. 



When viewed in cross section, Nos. 1 and 2 present a ver- 

 tical scarp, but the sand bed invariably stands at an angle of 

 about 30° to 35°. In connection with No. 2 the following 

 facts are worthy of notice, viz. — The great regularity of the 

 several rows of partially rolled stones mixed with the organic 



* Trans. Roy. Soc, Eclmh., loc. cit., p. 621. 



