OF THE LEVEL OF THE SEA. 73 



1. Vegetable soil. 



2. Coarse gravel, two feet. 



3. Sand, ten feet. In these two I did not find any or- 

 ganic remains. 



4. A series of thin beds of sand, gravel, and clay, full of 

 sea-shells. In the course of two visits, I distinguished 

 thirty-three species. 



5. Diluvium, with boulders of unknown depth. 



The shelly beds are about fifty feet above the level of 

 the sea, but as it is a deep-water deposit, it indicates a 

 much greater actual change of level. It will be observed 

 by the subjoined list that the shells agree in a remarkable 

 manner with those found in the Island of Bute, and differ in 

 as great a degree from those of the adjoining sea marked R. 



Cyprina Islandica. Trochus inflatus, E. 



Crassina Garensis, R. Mya truncata, R, 



multicostata, E. N. S., E. 



Tellina Proxima, E. ovalis. 



Pecten Islandicus, E. Cardium edule, R. 



Natica glaucinoides, E. Anomia Ephippium, R. 



clausa, E. Patella Virginea, R. 



Balanus costatus. Fissurella Noachina, R. 



Turbo littoreus R. Fusus Banffius. 



expansus, E. Peruviamis, E. 



canalis. turricolus, R. 



Modiola vulgaris, R. discrepans. 



Nucula oblonga. Buccinum undatum, R. 



minuta, R. Mactra striata, E. 



gibbosa, E. Lucina undata. 



Saxicava rugosa, R. Amphidesma prismaticum. 

 N. S., E. 



I have lately, through the kindness of Professor Jameson, 

 had an opportunity of submitting the unknown shells to 

 M. Deshayes. He observes that these formations are to 

 Great Britain and Ireland, what those of Palermo are to 

 Sicily, and correctly supposes that they contain a large pro- 

 portion of the shells which still live on our shores ; his re- 



