POST-TERTIARY FOSSILIPEROUS DEPOSITS. 87 



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



3. Ostrea edulis 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 Cohntraive, few exceeding fom' 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 : 



Ar(jill<2cia cylindrica, G. O. Sars. 

 Cythere pellucida, Baird. 



— viridis, Miiller. 



— villosa (G. 0. Sars). 



— concinna, Jones. 



— angulata (G. 0. Sars). 



— tuherculata (G. O. Sars). 



— Bunelmensis (Norman). 

 Cytlieridea torosa (Jones). 

 Eucythere Aryus (G. O. Sars). 

 Loxoconcha guttata (Norman). 



— tamarindus (Jones). 

 Cytherura tiiyrescens (Baird). 



— similis, G. O. Sars. 



— clathrata, G. 0. Sars. 

 Cytheropteron nodosum, Brady. 

 Sderochilus contortus (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 



