CO POST-TERTIARY ENTOMOSTRACA. 



Cytherura similis, G. 0. Sars. 



— Sarsii, Brady. 



— clathrata, G. 0. Sars. 

 Cytheropteron latis&imum (Norman). 

 Pseudocythere caudata, G. O. Sars. 

 Sderochilus contortus (Norman). 



F aradoxostoma variahile (Baird). 



16. West Tarbert. 



For a considerable distance along the Loch on the south side, a little beyond where 

 the new road begins near the head of the Loch, a fossiliferous clay crops out, in some 

 places abutting against the native rock to which Balani and Serpulce may be seen 

 adhering in great abundance. 



A little further down the Loch, where the rocks stand out more steeply into the sea, 

 the shell-bearing clay disappears, but it is seen again in the course of about a mile, resting 

 against the rock on the west side of the bay. Considerable denudation has, therefore, 

 taken place. 



Many parts of the true bed are overlain by eight or ten inches of a shell debris 

 thickly mixed with clay. This covering is undoubtedly a wash thrown up in heavy 

 storms and is coated with grass. Many of the shells in the lower clay, especially 

 Pecten Islandicus and Buccinum undatum, have attained a portly size, evidencing their 

 growth under secure and favorable conditions. 



One hundred parts of the dry clay lost 66 per cent, in washing through a sieve of 

 96 meshes to the inch ; 16 parts of the residue were retained in a sieve of |-th-inch mesh, 

 consisting of small gravel and broken shells; the other 18 parts were composed of fine 

 sand. 



Height above sea, just above and beneath high-water-mark. 



The following Ostracoda were found : 



Cythere pelhcida, Baird. 



— viridis, Miiller. 



— hitea, Miiller. 



— pidckella, Brady. 

 T- villosa (G. 0. Sars). 



— concinna, Jones. 



— angulata (G. 0. Sars). 



