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Show 614 MR. A. E. CRAVEN ON [Nov. 30, Malacca; but in the arrangement of its markings there is but little similarity. At present we do not know the male1. PAPILIO LESCHES, sp. nov. Size and shape of P. albinus, but with an irregular creamy-white patch, deeply dentate on its outer edge, midway between the end of the cell and the apex of the primaries, extending from the costa to beyond the middle discocellular nervule; beneath, this mark is narrowly indicated, and extending beyond and below it is a broadish band of greyish scales ; the secondaries have the white band much narrower than in P. albinus. Mus. nostr. Several examples, all agreeing with one another. EXPLANATION OF PLATE LVI. Fig. 1. Mycalesis melanopis, p. 610. 2. Lamprolenis nitida, p. 611. 3. Doleschallia dascon, p. 612. 4. dascylus, p. 612. 5. Pieris ornytion, p. 613. 6. Papilio goldiei, p. 613. November 30th, 1880. Prof. Flower, LL.D., F.R.S., President, in the Chair. The following papers were read:-• 1. On a collection of Land- and Freshwater Shells from the Transvaal and Orange Free State in South Africa, with Descriptions of nine new Species. By A L F R E D E. C R A V E N , F.Z.S., F.L.S., F.R.G.S., &c. [Received October 8, 1880.] (Plate LVII.) H E L I X (PELLA) PLANTI, Pfr. P. Z. S. 1854, p. 51; Reere, Conch. Icon. pl. 189. sp. 1325. V ' Plentiful at the Leydenburg goldfields. HELIX SYMMETRICA, sp. nov. (Plate LVII. fig. 2.) Shell globose, imperforate, vitreous, semitransparent, light olive-f nt"; t alf°V?g ^ f 7 ! * ^ 1 0 " / ^ ^ B 1 M * W i t l ™ the'aperture, faintly spirally striated, lines of growth very apparent; spire slightly «ite±sr&?^taK^ *r BprmenB of described above Th! varint ™ a „ £ A?? "' m COlour f r o m the femal<*s be due to indxridual p e c E h y **"**** " * ° W n ^ tkese fresb sPe™* to |