Dr. P. P. Carpenter on new Forms of MoUusca. 423 root subsequently beneath. The root then penetrates into the soil, the prothallium having been fastened to the surface by its rootlets. The foot beneath is intimately adherent to the tissue of the prothallium, and stretches over the upper opening of the spore, for the purpose of taking up its nutritive material and handing this over to the other parts of the germ. The young bud remains long concealed ; but when it subsequently breaks out, the cast remains of the prothallium perish. The more particular description of the entire process of de-velopment, especially the cell-division of the germ, the appear-ance of the vascular bundles and of the later roots, and the evolution of the leaves, will shortly be pubUshed, with the neces-sary figures, in Pringsheim's ' Annalen.' XL VI. — Diaff noses of new Forms of Molltisca from the Vancouver District. By Philip P. Carpenter, B.A., Ph.D. The shells here described were mostly collected by Indian chil-dren for their excellent teacher Mr. J. G. Swan, in the neighbour-hood of Nceah Bay, AV. T. They were presented by him to the Smithsonian Institution, Washington, D.C. ; and, in accordance with their liberal policy, the first available duplicates will be found in the British Museum or in Mr. Cuming's Collection. The species are numbered to correspond with the list in the British Association Report for 1863, pp. 626-628; see also pp. 636-664. 5. Meera salmunea. M. testa parva, solida, compacta, subquadrata ; Isevi, nitente, epi-demiide tenui cinerea induta ; extus palUde, intus vivide salmoneo tincta ; margiuibus dorsalibus rectis, ad angulum 1 20° separatis, umbonibus baud extantibus ; margiuibus antico et ventrali regu-lariter late excurvatis ; parte postica brevissima, baud augulata : intus, dent. card, utraque valva ii., quorum unus bifidus ; laterali-bus V. dextr. ajquidistantibus, ant. extante, post, parvo ; nymphis rectis, baud conspicuis ; cicatr. add. post, subrotundata, ant. sub-rhomboidea; sinu pallii satis regulariter ovaU, per iv. inter v. partes interstitii porrecto. Long. •57, lat. '45, alt. '11 poll. Variat testa aurantiaca, rarius albida, rosaceo tincta. Hab. San Francisco {Pac. Rail. E.E.); Neeah Bay {Swan), plentiful; Monterey, 20 fathoms (CoopCT-). In shape almost close to Macoma crassula, Desh. (Arctic) ; but that species is thinner, not glossy or salmon-coloured, and has no lateral teeth. 6. Angultts variegatus. A. testa forma A. vbtuso simili, sed costa interna omnino carente, valde iuKquilaterali, solid iore, nitente, rosaceo et flavido subradia-
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