1835.] 



Deposit of Recent Marine Shells. 



133 



the channel of the stream at this place is about 14 feet, and 

 the depth of the banks is about 2£ feet. The sandy deposit 

 appears to extend on both sides of the stream, upwards and 

 downwards without alteration, but the fossils are confined 

 to a circular or rather elliptical space, the breadth of which 

 (across the stream) is about twenty-five feet, while its length 

 is only about 15 feet. The deposit extends back from each 

 bank only about 6 feet, so that more than one half of the 

 whole mass has been cut away during the change of the 

 course of the rivulet. The whole depth of the bed, as it 

 exists at present, is about 2£ feet, but I am informed by the 

 overseer upon the estate, who superintended the workmen 

 during their operations, that after the soil had been removed, 

 ten or twelve feet of earth full of sand was carried away, so 

 that the depth of the bed in its original state must have 

 been 12 or 14 feet. 



The number of species which have been already collected 

 in the situation described amount to about thirty. 



I have been greatly indebted to Mr. Sowerby for his 

 assistance in determining their names. 



I. Echinus Esculentus. 



Shells. 



1. Balanus costatus 



2. Mya truncata 



3. Amphidesma Boysii 



4. Saxicava rugosa 



5. Tellina tenuis 



6. Lucina flexuosa 



7. Cyprina vulgaris (pro- 



bably) 



8. Cardium edule 



9. Nucula minuta 



10. Astarte minima 



11. Anomia ephyppium 



12. Mytilus edulis 



13. Modiola albicostata 

 Pecten Islandicus 



14 

 15 



pusio 



Lottia parva (Patella p 

 Montag.) 



1 7 # pissurella Noachina ( Ce- 

 moria Flemingu, Leach 

 MSS.J 



18. Helix levigata (Montag.) 



19. Velutina communis 



20. Natica glaucinoides 



21 . Littorina vulgaris 



22. Trochus cinerarius 



Margarita 1 



Rissoa 1 



23. 

 24. 

 25. 

 26. 

 27. 

 28. 

 29. 

 30. 



Lacuna vincta 

 Fusus Bamifius 

 lamellosus 



Buccinum undatum 

 > striatum NS.? 



* The Fissurella Noachina has been found at Oban, Argyleshire, by Mr. Lowe, 

 See Zoolog. Journ. Mr. Sowerby has compared a specimen from Dalmuir with 



