Mr. A. Adams on new Molhisca from China and Japan. 299 of Mollusca new to science, which be proposed to name Margarita elegantula, Aclis Walleri, and Xassa 1 HaliaJeti, besides twelve other species which were new to the British Isles. Of these last, ten are Scandinavian, one is Mediterranean, and the other had hitherto been known only as a Crag fossil. He reserved the description and particulars of these species for a work on British Conchology which he had undertaken. He ascertained that the Gulf Stream never impinges on any part of the coast which he had examined, although the climate was temperate. The author noticed the occurrence at considerable depths (nearly 80 fathoms) of Uving Mollusca which usually inhabit the shore or very shallow water, viz. Lamellaria perspicua, Xassa incrassata, and CyprcEa europcea, all of them being widely diffused species, — thus apparently illustrating the view entertained by the late Professor Edward Forbes, that those species which have the widest horizontal range have the greatest vertical depth. Judging, however, from the great depth at which he found the fossil shells of some Mollusca \e. g. Pecten Islandicus andMycr truncata var. Uddevallensis) which inhabit much shallower water in the Arctic zone, the author is dis-posed to believe that the bed of this part of our Northern Sea has sunk smce the so-called " glacial " epoch, and that this circumstance may possibly account for the above-mentioned occurrence of sub-littoral species at such depths. With respect to the comparative size of those Mollusca which are common to the seas of the North as well as of the South of Europe, the author referred to an observation made by Mr. Salter, in a recent number of the ' Quarterly Journal of the Geological So-ciety,' that some fossil shells which Mr. Lamont had brought from Spitzbergen were larger than those of the corresponding species in our own mountain limestone ; and he remarked that the same rule appears to apply also to marine plants, for he never saw such gigantic fronds of the Laminaria saccharina, which fringes all our coast-line, as he did in the voes of North Zetland. The author concluded by paying a just tribute of respect to the labours of Professors Sars and Loven, Malm, Morch, Asbjornsen, and other Scandinavian naturalists, who were investigating the Mollusca of the Northern seas with a zeal and accuracy worthy of our emula-tion. XXXIII. — On some new Genei-a and Species of Mollusca from the North of China and Japan. By Arthur Ajjams, F.L.S. &c. Genus Onoba, H. & A. Adams. Onoba subulina, A. Adams. O. testa ovato-subulata, alba, rimata, tenui, opaca ; spira producta. apice obtuso ; anfractibus 4^, convexiuscuiis, trans versim striatis, striis creberrimis, suturis obUquis impressis; apertiu^ oblongo-
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