Mr. W. S. Kent on two new Siliceous Sponges.Leda hyperborea, Lov�n. R. C. Butley.Cardium angustatum, Sow. N. C. Thorpe, Suffolk.---interruptum, Wood. C. C. Orford.-strigilliferum, Wood, = C. elegantulum, Moller. Hab. North seas. * Cardita borealis, Conrad, = C. analis, Phil. Chil. ser. Sud-bourn, near Orford. rudista, Lamarck,=the long variety of C. senilis (Crag Moll.), the shorter being the Arca antiquata of Poli, but not of Linn�, and the C. sulcata of Lamarck. Erycinella ovalis, Conrad. R. C. Walton. Venus ovata, Pennant. R. C. Butley. -chione, Linn�. R. C. Waldringfield. * Tapes pullastra, W. Wood. R. C. Waldringfield. -virginea, var. sarniensis. C. C. Orford. = T. per-ovalis, Wood? Gastrana laminosa, Sow., = Petricola ventricosa, Krauss. Hab. South Africa. *Neera arctica, Sars. C. C. Orford. *Pholas dactylus, Linn�. R. C. Walton. *--arva, Pennant. R. C. Waldringfield. * Toxopneustes drobachiensis, Miiller. R.C. Butley. Echinocyamnus ovjformis, E. F. R. C. Walton. ---hispidulus, E. F. R. C. Walton. Flabellum Woodii, Milne-Edwards. R. C. Waldringfield. In pursuance of a statement made by myself at the Norwich meeting of the British Association concerning the non-deriva-tive character of the fossils of the Red Crag (except in such palpable instances as those of Eocene shells, &c. : see Report of Sections), I have now by me a list of nearly fifty species of bivalves which I have seen with the valves united, from this deposit, including Solen ensis, Panopea Faujasii, Mactra glauca, and many species which are held together by very slight ligamental fastenings. XX.-On two new Siliceous Sponges taken in the lateDredging-Expedition of the Yacht 'Norna' of the Coasts of Spain and Portugal. By W. SAVILLE KENT, F.Z.S., F.R.M.S., of the Geological Department, British Museum. [Plate XV.]IN addition to the form described as Pheronema Grayi in lastmonth's number of this Magazine, other sponges were takenat a considerable depth, which, though not so pretentious in217
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