POST-TERTIARY POSSILIFEROUS DEPOSITS. 



87 



2. Carse mud . . . . 9 ft. to 10 ft. 



3. Ostrea edidis bed .... 2'6 „ 3 „ 



The sample of clay containing the shells washed quite away, leaving neither sand nor 

 gravel, but simply shell debris mixed with a little vegetable matter. 



Ostrea edulis is very abundant. None of the specimens, however, are as large as those 

 we have noticed in the Pecten maximus bed at Colintraive, few exceeding four inches in 

 their longest diameter, although they are generally very thick and solid. 



Height above the sea thirty-four feet. 



The following Ostracoda were found : 



Argillcecia cylindrica, G. 0. Sars. 

 Cytliere pelliicida, Baird. 

 — - viridis, Miiller. i 



— villosa (G. 0. Sars). 



— concinna, Jones. 



— angulata (G. 0. Sars). 



— tuherculata (G. 0. Sars). 



— Dunehnensis (Norman). 

 Cytlieridea torosa (Jones). 

 Euci/there Jryus (G. O. Sars). 

 Loxocojicha guttata (Norman). 



— iamarhuhbs (Jones). 

 Cytherura niyrescens (Baird). 



— similis, G. O. Sars. 



— clathrata, G. O. Sars. 

 Cytheropteron nodosum, Brady. 

 Sclerochilus contort us (Norman). 



2. Brick-work south-west of Stirling. 



At McAlpin's brickwork, south-west of Stirling, there is a stifi' clay of a dark colour, 

 composed of fine mud with a small percentage of sand and gravel. Estuarine shells are 



