410 Searles V. Wood,jim. — Sequence of Glacial Beds. 



obtained. As some additions to this fauna have since been made, 

 and in order to render the particulars of it better known, it may be 

 useful to enumerate the satisfactorily identified specimens here ; 

 omitting several others to whose identification any uncertainty is, 

 from their imperfect condition, attached.^ djprcea Eiiropcea, Bucanum 

 undatum, var. tenerum, Trophon muricatus, T. antiqiius (dextral form), 

 T. scalar if ormis, two new small species of Trophon, Purpura lapillus, 

 ditto var. incrassata, Nassa incrassata, N. granulata, and a new Crag 

 species of Nassa not yet named, Mangelia turricula, M. linearis, and 

 a new Crag species of Mangelia not yet named, Natica clausa, N. 

 Jielicoides, N. Alderi, Scalaria Trevelyana, S. Grosnlandica, Turritella 

 incrassata, T. terehra, Cerithium tricinctum, Cerithiopsis tuhercularis, 

 Chemnitzia internodula, Odostomia unidentata, Bissoa semicostata (of 

 Woodward, nonMont.), Littorina littorea, L.rudis, Margarita undidata, 

 Trochus cinerariiis, Capulus JJngaricus, Tectura fulva, Calyptr(Ba 

 sinensis, Dentalium dentale, Anomia ephippium, ditto var. acideata, A. 

 striata, Pecten opercularis, P. pusio, P. varius, Mytilus edulis, Pectun- 

 culus glycimeris, Limopsis pygmcea, Nucula Cohholdice, N. tenuis, Leda 

 oblongoides, L. lanceolata, Cardium edide, Cardita scalaris, C. corbis, 

 Loripes lacteus, L. divaricatus, Lucina horealis, Woodia digitaria, 

 Astarte horealis, A. sulcata, A. compressa, A. Burtinii, A. Omalii, 

 Erycinella ovalis, a new Crag species of Lasea not yet named, 

 Montacuta bidentata, Cytherea rudis, Cyprina Islandica, Venus 

 fluctuosa, V. fasciata, V. ovata, Tellina obliqua, T. calcarea, T. 

 Balthica, T. crassa, Scrobicularia piperata, Mactra ovata, Panopcea 

 Norvegica, Mya arenaria, Saxicava arctica (smooth small form), Solen 

 ensis, Pholas crispata, Corbula nucleus, C. contracta (Say.), and 

 Pandora incequivalvis. Of these the new Trophons, Nassa, Mangelia, 

 and Lasea, Cerithium tricinctum, Bissoa semicostata (of Woodward), 

 Nucula Cobboldioe (which is very common), Astarte Burtinii, A. 

 Omalii, Erycinella ovalis, and Tellina obliqua, are not known living ; 

 while Nassa gramdata (if indeed it be living), Turritella incrassata, 

 Chemnitzia internodula, Dentalium dentale, Limopsis pygmcea, Cardita 

 Corbis, Woodia digitaria, and Cytherea rudis, are known living 

 only in the Mediterranean, the Azores, the Canaries, or in abyssal 

 recesses of the Atlantic ; and Cardita scalaris (as C. ventricosa of 

 Gould) lives only on the Pacific Coast. All of them, except the 

 new Trophons, Venus fluctuosa, Tellina Balthica, and Loripes lacteus, 

 are shells of either the Coralline, Ked, or Chillesford Crags. 



Now, contrasted with the above, the only species that I have 

 been able (from papers of Mr. Binney, and from the collecting of 

 Mr. Harmer and of Mr. Hughes) to ascertain have occurred in the 

 Middle Sands of Lancashire are the following 25 species, viz., 

 Nassa reticulata,^'-' Buccinum undatum, Fusus Bamfflus,^'-' Aporrhais 

 pespelicani, Murex erinaceus, Turritella terebra, Purpura lapillus, 

 Littorina littorea, Mangelia turricula, Dentalium dentale (or else D. 

 tarentinum), Natica catena'? (monilifera) , Patella vulgaris f Venus 



^ The specimens having all been re-examined in reference to the forthcoming 

 Supplement of the Crag Mollusca, one or two names will be found to differ from those 

 in the list published in the British Association Eeports, 1870. 



