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Show 458 MR. HARPER PEASE ON POLYNESIAN LAND SHELLS. [May 2, Long. 12, diam. 6^ mill. Apert. long. 5, diam. 3| mill. Hab. Guadalcanar, insul. Solomon. This delicate little species was collected at the above locality by John Brazier, Esq. It is the nearest allied to P. minuta, Pfr. It differs in being more slender, thinner, the spire elongate, the aperture smaller, the surface more distinctly granulose, and the suture marginate. PARTULA FABA, var. SUBANGULATA, Pse. T. anguste perforata, dextrorsa, conico- interdum abbreviato-ovata, solida, leevigata, striis incrementi notata, rufescentifusca, juxta suturam fascia flavescente cingulata, vel flavescente, fascia fusca ad suturam, interdum omnino straminea aut flavescente aut rufescenti- fusca ; anfr. 6, convexi, ad suturam subangulati, ultimus plerumque lumidiusculus; columella superne tuberculato-cullosa, late dilatata; perist. intus callosum, late expansum, margine dextro tuberculato-calloso, superne sinuato, fuscum, callo albido; apertura oblongo-ovalis, subauriformis. Alt. 28, diam. 15 mill. Hab. Insula Tahaa. The metropolis of P. faba, Mart., is on the island of Raiatea ; on the adjoining island, Tahaa, it occurs in a modified form, which we distinguish by the above name. Subfamily SUCCINEINA, H. & A. Adams. Previously to the publication of the report of the American Exploring Expedition but three species of Succinea were known as inhabiting Polynesia. At the present time it may rank as the metropolis of the family, not only as regards the number of its species but also types. The number will be much increased, that of the Hawaiian Islands at least four-fold. It is impossible to define their generic, much more their specific limits, without a knowledge of the animals. However closely the shells inhabiting distant provinces may resemble each other, it will eventually appear that the genera in this family are as local in their distribution as those of the Helicterinee. The animal of Succinea picta, Pfr., inhabiting St. Helena, given by H. and A. Adams as the type, differs certainly from the European genus. It is also doubtful whether any species of the genus Helisiga inhabits Polynesia. I have met with no animal corresponding to the original type of that genus. I would note that the character given to the Hawaiian species arranged under the above genus by H. and A. Adams, viz. "the mantle-margin covering the outer lip," I have not observed, nor does it appear on the figures in the Report of the American Exploring Expedition. I class for the present all the Polynesian species under the genus Succinea, with the exception of two forms at either extreme of the family: the one, Catinella, has been heretofore classed with Oma- |