474 APPENDIX. 



pointed out by him to his pupils, during his geological walks, 

 from the year 1 806 up to the present time. One of his pupils, 

 the late Assistant-Surgeon Macgregor, in 1811, read before the 

 Society a paper on the recent sea- shells he noticed about 4^ 

 miles from Glasgow. Captain Laskey, in 1814, read a memoir 

 on a bed of sea-shells, estimated 40 feet above the level of the 

 Clyde, which he examined in the line of the Ardrossan Canal, a 

 few miles from Glasgow, of which memoir an abstract was pub- 

 lished in the 4th volume of the Society's Memoirs. He enu- 

 merated the following shells: — h Turbo littoreus, 2. rudis, and 

 3. terebra ; 4. Nucla minuta, and .5. nuclea ; 6. Patella vulgaris, 

 and 7. pellucida : 8. Buccinum lapillus, and 9, undatum ; 10. 

 Mytilus edulis ; 11. Venus islandica, 12. striata, 13. literata ; 

 14. Pecten opercularis, the subrufus of Donovan ; 1.5- Balanus 

 communis; 16. Anomia ephippium ; 17- Tellina plana; 18. 

 Nerita littoralis, 19. glaucina; 20. My a truncata ; 21. Trochus 

 crassus ; 22. Cardium echinatum AH these shells, Captain 

 Laskey remarked, still inhabit the Frith of Clyde and its shores, 

 but occur below Dumbarton, or where the water is constantly salt. 

 Captain Laskey also described to the Society a bed of dead sea- 

 shells near to Dumbarton, and above the present level of the 

 Clyde, among which he particularized Venus sulcata, Pecten 

 islandica, and Ostrea islandica of Turton. Dr Fleming after- 

 wards read to the Society " A short account of a bed of fossil 

 shells found on the banks of the Forth to the west of Borrow- 

 stonness." This bed he described as entirely of sea-shells, mixed 

 with a small portion of sand. The common oyster is in greatest 

 abundance ; and along with that shell all those species which 

 are found in plenty on the shores of the Frith of Forth ; such as 

 Mytilus edulis, Venv^ rhomboidea, Mactra truncata, Buccinum 

 undatum. Turbo littoreus. Patella vulgaris. The bed is about 3 

 feet thick, and below it is a bed of gravel resting upon the sand- 

 stone of the district ; it extends in a straight line along the bank 

 of the Forth, in a direction from east to west, nearly three miles, 



