67 



Ostrea flabelloides, Lamk. 

 large flat, new species 



Hinnites tuberculosns, Goldf. 

 Lima proboscidea, Sow. 



Etheridgii, Wright 



duplicata, Soio. 



Trichites undulatiis, Lye. 

 Astarte excavata, Sow. 

 Cyprina, (mould) 

 Cypricardia cordiforniis, Desk 

 Myacites calceiformis, Sow. 



CONCHIFERA. 



Gervillia consobrina, d Orhig. 

 Mytilus explanatus, Mor. 

 Pholadomya Heraulti, Agass. 

 Homomya crassiuscula, Lye. 

 Myoconcha crassa, Sow. 

 Pteropema plana, Lye. 

 Trigonia costata. Sow. 



striata, Sow. 



decoi-ata, Agass. 



Modiola imbricata, Sow. 

 Pinna fissa, Fhil, 



jjo. 6. — The Oyster-bed consists of a coarse brown, ferruginous, 

 sandy Marl, with inconstant layers of hard rock, which breaks 

 up unequally. It is chiefly in the sandy seams that the fossils 

 are found. The bed is about a yard in thickness. The bottom 

 was seldom exposed, as it was mainly for the Eoadstone that 

 the working was carried on. It contains: — 



CONCHIPEEA. 



Ostrea flabelloides, Lamk., and 

 several well-marked varieties 

 of the species 



Ostrea pyxiformis, Wright 



Pecten demissus, Goldf. 



Lima proboscidea, Sow. 



^ Etheridgii, Wright 



Monotis tenuicostata, Wright 

 Gresslya abducta, Phil. 

 Pleuromya tenuistriata, Agass. 

 Pholadomya Heraulti, Agass. 



ovulum, Agass. 



media, Agass. 



Dewalquei, Lye. 



Anntilosa. 



Serpula grandis, Gold/. 



Serpula limax, Goldf. 



ECHINODEBMATA. 



Clypeus Michelini, Wright Pseudodiadema depressum, Agass. 



Stomechinus germinans, Phil. Acrosalenia Lycetti, Wright 



No. 7. — Galeareo-siliceous Sand. — Of a brown, grey, or yellow 

 colour. It forms the uppermost bed in the North Quarry, and 

 constitutes the subsoil over a considerable area of this part of 



