542 



PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [Jlinc 20 



presence of such species as Ovula sjpelta, Natica millepunctata, Tapes 

 teoaturatus, and Cardita corhis, now found only in the Mediterranean, 

 gives a presumption that the seas which deposited these fossils were 

 older than any other parts of the Eed Crag. But the aspect of this 

 portion of the Crag is not more marked by the presence of such 

 forms as these, than it is by the entire absence from it of those 

 species whose connexion is now with the colder regions of the north, 

 such as Panojpcea Norvegica, Trntonium antiquum (dextral var.), Lecla 

 laneeolata, and others ; and it may be more especially remarked that 

 in the Walton Crag there has not been obtained a single unequivocal 

 specimen* of any species of the genus Tellina, while the shells in 

 the upper beds of the Eed Crag are composed mainly of individuals 

 of one or other of the species of that genus. 



List of Species of MoUusca from the Crag at Walton-on-tTie-Naze. 

 (a denotes abundance.) 



Univalves. 



Ovula spelta, Linn. 

 Cyprgea avellana, J. Sow. 

 Europsea, Mont. 



Yoluta Lamberti, J. Sow. 



Columbella sulcata, J. Sow. 



Nassa conglobata, £roc. 



elegans, Leathes. 



granulata, J. Sow. 



propinqua, J. Sow. 



a. reticosa, J. Sow. 



Buccinum undatum, var. striatum, 

 a. Buccinopsis Dalei, J. Sow. 

 Q,. Purpura tetragona, J. Sow. 



lapillus, Linn. 



Murex tortuosus, J. Sow. 

 (I. Tritonium antiquum, var, contrarium. 



buccinatum ? 



costiferum, S. Wood. 



Trophon muricatum, Mont, 



Mangelia Boothii, Smith. 



cancellata, J. Sow. 



— — Igevigata, Phil. 



mitrula, J. Sow. 



^ turricula, Mont. 



Cancellaria coronata, Scacchi. 



Cerithium variculosum (Hma ?). 



granosum, S. Wood. 



Cerithium tricinctum, Brocchi. 

 Turritella incrassata, J. Sow. 

 Aporrbais pes-pelicani, Linn. 

 Odostomia unidentata, Mont. 

 Pyramidella Iseviuscula, S. Wood. 

 Eulima polita, Linn. 

 Leptoxis? terebellata, Nyst. 



? pendula, S. Wood. 



? suboperta, J. Sow. 



Trochus einerarius, Linn. 



cineroides, S. Wood. 



zizipbinus, Linn. 



papillosus ?, Bacosfa. 



subexcavatus, S. Wood. 



Adamsoni, Payr. 



Natica catenoides, S. Wood. 



hemiclausa, J. Sow. 



heHcina, Broc. 



multipunctata, var. 1 



millepunctata J 



Capulus XJngaricus, Linn. 



obliquus (Piliscus ?). 



mihtaris, Mont. 



Calyptrsea chinensis, Linn. 

 Tectura virginea, Mull. 

 Emarginula fissura, Linn. 

 Fissurella Grasca, Linn. 

 Actaeon Nose, J. Sow. 

 Conovulus pyramidaUs, J. Sow. 



Anomia, sp. 

 Ostrea edulis, Linn. 

 Pecten opercularis, Linn. 



pusio, Pennant. 



tigrinus, Milll. 



Bivalves. 



Lima exilis, S. Wood. 



Loscombii, J. B. Sow. 



Mytilus edulis, Linn. 

 Modiola barbata, Linn. 

 costulata, Risso. 



* There is one specimen of T. prcetenuis in my cabinet with the locahty of 

 Walton attached, but it is of so old a date that I have now no recollection of it. 



