148 



ON ROMAN JIEMAINS AT SOUTU SlIIKLDS, 



III. SHELLS. 



Great numbers of Shells were found in various parts of the 

 Station, under circumstances which admitted of no doubt that 

 the molluscs which once tenanted them had been used as food. 

 They were mostly mixed up with bones, broken pottery, and 

 other refuse from the kitchens of houses ; and the greater num- 

 ber were found near the ramparts. Snail shells were also found, 

 but not in sufficient numbers to render it at all certain that they 

 had been used as food. For the following List I am indebted to 

 Mr. George Lyall, F.G.S. 



Oyster. Numerous. 



{Osirea edulis.) 



MussELL. Veiy numerous. 



{Mi/tilus edulis.) 



Common Winkle. Numerous. 

 {Littorina littorea.) 



Limpet. Very numerous. 



{Patella vulgata.) 



Snail. Some, but not very many. 



{Helix aapersn.) 



TV. BUILDING MATERIALS. 



Several kinds of Stone were used by the builders in the con- 

 struction of the etlifices of tlie Station, and in paving the Forum, 

 the halls, and the streets. Thin stone shingles were also used, 

 as well as tiles, for roofing purposes. For the following List of 

 the different kinds of Stone, and Building Materials generally, 

 employed, and of the nearest Localities, whence similar kinds 

 can be obtained at the present day, I am also indebted to the 

 kindness of Mr. (Jeorge Lyall. 



