340 



PROCEEDINGS OF THE 



Hoiistwi are littoral * that I have often supposed that the shore 

 could not be far distant, probably not more than a mile. The 

 same prevalence of littoral shells has been observed in many of 

 the other shell-beds of the Clyde district, and the same conclusion 

 has been drawn therefrom — that they were all, more or less, 

 situated near the shore. 



List of Fossils found in Houston Clay-field. 



PISCES. 

 A few small vertebrce, . ~ . . Not determined. 



CONCHIFERA. 



Anomia epidpinum, Linn., - - - 

 Mytilus edulis, Linn., ----- 



modiolus, Linn., - - - - 



Peden Islandicus, Miill., - - - - 

 Tellina calcarea, Chemn., - - - 

 Saxicava rugosa, Linn., - - - - 

 Astarte compressa, Mont., - - - 



sulcata, Da Costa, - - - 



Cyprina Islandica, Linn., - - - 

 My a truncata, Linn., ----- 

 Leda pernula, Miill., ----- 



jjygmcea, Miinster, - - - - 



Axinus flexuosus, Mont., - - - - 

 Niicula tenuis, Mont., - - - - 

 Pholas crispata, Linn., - - - - 

 Cardiura fasciatum, Mont., - - - 



Common. 



Common. 



Common. 



Common, but small. 



Common. 



Common. 



Common. 



Common. 



Common, but small. 



Common. 



Common. 



Common. 



Common. 



Common. 



Rare, one specimen. 



Common. 



GASTEROPODA. 



Buccinum undatum, Linn., - - - 



Fusus antiquus, Linn., - - - - 



Littorina littorea, Linn., - - - - 



obtusata, Linn., - - - 



Tropthon clathratus, F. and H., - - 



var. Gunnerie, - - - - 



Bissoa striata, Adams, - - - - 

 parva, Adams, - - . - 



var. interrupta, . - - - 



Common and large. 



Common and large. 



Common and large. 



Common. 



Rare, one specimen. 



Rare. 



Common. 



Common. 



Rare. 



