118 Mr. A. Adams on new Mollusca from Japan. been deservedly commemorated by its employment as a desig-nation for this most distinct and elegant little species, which, with the same sculpture, size, and general features as C. Lyonne-tianum, yet differs from it markedly in its exactly trochiform, shorter, or more broadly conical shape, with a flat or flattened base, sharp keel, shorter, less pyramidal, straighter-sided spire, and flatter volutions : resembling a miniature Trochus Niloticus or zizyphinue, L. The colour is, in one example, pale straw, with spiral bands of dark fascicled hair-like lines; in another very dark brown, with narrow spiral yellowish-or greenish-white lines; and the third is uniform plain coffee-brown, — the flattened base, except the keel, being in all three of the latter colour. Lea Rectory, July 12, 1860. XXI. — Mollusta Japonica: New Species o/" Aclis, Ebala, Dunkeria, fyc. By Arthur Adams, F.L.S. &c. The genus Aclis of Loven should, I believe, be distributed into four genera :— -Aclis, or those " cingulis elevatis acutis obducti ;" Ebala 3 Gray, of which A, nitidissima is the type ; Hyala, II . & A. Adams, of which A. unica is an example ; and Dunkeria of Car-penter, which has cancellated whorls, and is neither an Aclis nor a Turbonilla. I here indicate four species of Aclis, two of Ebala, and three of Dunkeria, all of which I believe to be new. I add a notice of a very elegant little shell, which appears to me to be a subgenus of Scala, and different from the Aciona of Morch, which is founded on Scalaria borealis, Beck (= S. Eschrichtii, Hold. & Moll. = S. undulata, Sow.), a species of which I obtained on the coast of Manchuria. I also add descriptions of a fourth species of Isapis, H. & A. Adams, and one of Cranopsis, A. Adams. Genus Aclis, Loven. Testa turrita, rimata ; anfractus numerosi, cingulis elevatis acutis ob-ducti. Apertura ovalis. Aclis labiata, A. Adams. A. testa turrita, rimata, alba ; anfractibus 7i, convexis, cingulis tri-bus acutis prominentibus, in anfractu ultimo quatuor, interstitiis simplicibus, profundis ; apertura ovali, expansa ; labio simplici ; labro expanso, antice subreflexo, margine integro, arcuato. Hab. OffMino-Sima; 63 fathoms. Aclis cingulata, A. Adams. A. testa turrita, rimata, alba; anfractibus 6^, convexis, cingulis duobus acutis prominentibus, tribus in anfa ctu ultimo, interstitiis
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