74 Proceedings of the Royal Physical Society. 
or at least very seldom, exposed to the direct influence of 
the sea. 
On the question as to how these appearances could have 
been produced, I still adhere to tlie opinion which I have 
already stated in print. In my judgment, the supposition 
of a long, gradually sloping beach will account for them all. 
On such a slope, storm-waves would carry shells and other 
light materials to a height of twelve or even fifteen feet, 
and the wind would transport them to even a greater eleva- 
tion. At the point nearest the sea, rolled pebbles would be 
deposited along with the shells, while at a greater distance 
only angular fragments would find their place. If, then, this 
sloping beach were undermined, and gradually eaten away, 
it would present an escarpment with a bed of shells from six 
to twelve feet above high-water mark. 
I think that on the west shoulder of the rock of Ardross 
Castle there still remains a small portion of the original 
sloping bank, which, in a direction towards the sea, falls in 
a small space at least two feet, showing a shell-bed at every 
point. 
Wtdiiesday, April 22, 1863. — James M'Bain, M.D , R.X., President, 
in the Chair. 
The following Donations to the Library were laid on the table, and 
thanks voted to the Donors : — 
1. (1.) Transactions of the Koyal Society of Edinburgh, Vol. XXII., 
Part. I., — Session 1861-62 ; (2.) Proceedings of the Eoyal Society of 
Edinburgh, Vol. IV., No. 56, 1861-62.- -From the Society. 2. The 
Canadian Naturalist and Geologist, and Proceedings of the Natural His- 
tory Society of Montreal, Vol. VII., No 6, December 1862. — From 
the Society. 3. History and Description of Needle-making, by Abel 
Morrall, manufacturer, Manchester. — From the Author. 4. (1.) Classi- 
fication of the Coleoptera of North America, by John L. Leconte, M.D., 
Part I., 1861-62 (2.) Synopsis of the Neuroptera of North America, 
by Hermann Hagen, July 1861. (3.) Synopsis of the Lepidoptera of 
North America; Part 1., Diurnal and Crepuscular Lepidoptera, by John 
G. Morris, Feb. 1862. (4.) Catalogue of Publications of the Smith- 
sonian Institution, corrected to June 1862. (5.) Annual Report of 
Board of Regents of the Smithsonian Institution, 1860. — From the 
Smithsonian Institution, U. S. A. 5. Natuurkundig Tijdschrift voor 
Nederlandsch Indie, deel xxiv, 1862. 6. Transactions of the Royal 
Scottish Society of Arts, Vol. VI., Part II., 1862. — From the Society. 
7. Report of the Royal Commission on the Operation of the Acts re- 
