28 MR. R. D. DARBISHIRE ON GREAT-ORME's-HEAD 



already been mentioned. He found there the Mytilus, 

 Ostrea, Patella, and Littorina, with three valves of a 

 Tapes, which he doubtfully identifies as pullastra, in clay 

 2 to 3 feet thick, which appeared " not to have undergone 

 much denudation during the process of upheaval.^^ 



Mr. Maw has already pointed out that this deposit is 

 probably of human origin. There is no doubt of it. The 

 deposit was some 2\ feet thick, and was entirely within 

 the uppermost layer of detritus, the blacker earthy clay. 

 My own collections on this spot have yielded : — Tapes de- 

 cussata (not pullastra) in pairs and valves, whole and 

 broken, all full-grown, and some large; Cardium edule, 

 whole and broken, some large; Mytilus edulis, Ostrea 

 edulis, Patella vulgata ; Littorina littorea, very abundant, 

 very large, and very fresh-looking ; L. littoralis and Pur- 

 pura lapillus. 



The Tapes is still gathered in Llandudno sands by the 

 natives of the Head for food. 



No bones nor any implements occurred. The whole 

 deposit has unfortunately been removed in the enlarge- 

 ment of the clay-pit. 



XV. A very extensive midden or collection of such 

 deposits has long been exposed at the foot of the slope 

 which connects the Inland Cliff at the south-western 

 angle of the Head with the Shore Cliff. For several 

 years past it has been open both on the shore section, and 

 also superficially on the slope above, by means of a large 

 cutting. The whole gronp of deposits apparently ex- 

 tended on the slope more than 30 yards from the shore, 

 and along it more than 150. 



Mr. Bonney has published (Geol. Mag. iv. 343) full 

 observations on this mass, especially as exposed in the 

 sea-cliff section. 



The remains consist of layers or heaps of Mytilus edulis, 

 Patella vulgata, Littorina littorea, with some oyster-shells. 



