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Show 1887.] FROM THE LOO CHOO ISLANDS. 317 species. In the series of eighteen specimens from Loo Choo I find considerable differences in form, some being much higher and more globose than others. One example is of a peculiar purplish-brown colour, and another is remarkable in having a thickening or limbus within the lip. 2. HELIX MERCATORIA, Gray. This species varies considerably in intensity of colour, from a very deep black-brown to pale yellowish olive, and the lines of growth in some examples are very much coarser than in others. One specimen with a comparatively smooth surface has the peripherial dark band unbordered by a pale zone on each side as usual. The colour of the peristome is also variable, being in the dark or most common forms purplish brown, and of a pale flesh-tint in shells of a lighter colour. 3. HELIX LUHUANA, Sowerby. The two specimens which I assign to this species are rather young and consequently thinner than adult shells. They differ also from the typical form in colouring, having only faint indications of transverse bands and much more distinct spiral stria?, in which respect they exactly resemble H. peliomphala from Japan. 4. HELIX LARGILLIERTI, Philippi, var. Testa perforata, globoso-conica, mediocriter tenuis, incrementi lineis oblique arcuatis tenuiter striata, sordide albida, zonis cluabus nigro-fuscis cincta, epidermide tenuissima fiavescente induta ; anfractus 6, convexiusculi, superne ad suturam angustissime submarginati, ultimus subglobosus, ad peripheriam supra aperturam obsolete angulatus; apertura late lunata, longit. totius \ subaquans; peristoma expansum, albidum vel dilutissime roseo tinctum, margine columellari reflexo, umbilicum semi-obtegente. Diam. max. 27 millim., min. 23, alt. 25. Helix largillierti, var. In form this variety very closely approximates to H. callizona, Crosse but may be slightly higher in the spire. That species, however according to Martens* and some specimens from Kiga, Japan which I have assigned to it, is very distinctly spirally striated, as is the case in H. peliomphala and other allied species from 1 Pfeiffer's Novitates Conch, vol. v. p. 31. PROC. ZOOL. Soc-1887, No. XXII. 22 |