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Show 186 MR. A. GARRETT ON THE TERRESTRIAL [Feb. 15, Stenogyra novemyyrata, Mousson, Journ. de Conch. 1870, p. 126 ; (Subulina) Paetel, Cat. Conch. 1873, p. 104 ; Schmeltz, Cat. Mus. Godeff. v. p. 90. Bulimus novemgyratus, Pfeiffer, M o n . Hel. viii. p. 138. Stenogyra gyrata, Mousson, M S . in Mus. Godeffroy, 1885. This species, which is distributed over a larger geographical area than any other species of land-shell, is diffused throughout all parts of Polynesia, the low coral-islands as well as the more elevated groups, and ranges throughout Melanesia, Micronesia, Australasia, the Moluccas, Philippines, Guam, Ceylon, Siam, Cochin China, China, and probably extends its range as far as tbe east coast of Africa. Since the publication of m y paper on the Society-Islnnd land-shells I have received from Mr. E. L. Layard examples of Bulimus souverbianus and B. artensis, both of which are identical with Polynesian specimens of S. tuckeri. Through the kindness of Dr. Hungerford, of Hong Kong, I have been enabled to compare Pfeiffer's Bulimus panayensis with B. tuckeri, and cannot detect a single character to separate the two species. I am strongly inclined to believe that the West-Indian Stenogyra subula, Pfr., is a form of the Polynesian S. tuckeri, and was accidentally imported with the Tahitian bread-fruit plants nearly a hundred years ago. M M . Crosse and Fischer (Journ. de Conch. 1863, p. 361) record the West-Indian '*Bulimus subula" from Cochin China, and give a good figure of the same, which latter is, undoubtedly the ubiquitous S. tuckeri. I reproduce their remarks as follows :- "Cette espece provient de Saigon et Fuyen-Moth, ou elle a ete recueillie par Monsieur Michau, dans les fosses, dans la terre et sous les herbes. II peut sembler tres-extraordinaire de retrouver en Cochinchine une espece des Antilles, qui n'a guere ete signalee jusqu'ici qu'a Cuba, a la Jamaique et a Saint-Thomas. Pour ne conserver aucun doute a son egard, nous avons cru devoir soumettre un individu authentique a l'examin de M . Pfeiffer, qui a cree l'espece. II faut done accepter le fait, qui peut-etre, au reste, seulement un accident d'acclimatation : la petitesse et la legerete de la coquille en question rendent cette supposition vraisemblable." I have lately received from Dr. Hungerford several examples of Stenogyra, labelled " Opeas subula, Pfr., Hong Kong," which do not differ from the Polynesian S. tuckeri. I have several specimens of Stenogyra received from Dr. Gibbons, who collected them in Algoa, South Africa. They were labelled " Stenogyra turriformis, Krauss," but are much smaller than the latter species, and the identification is questionable. They are of the same size, and coincide very nearly with <S. tuckeri. Bulimus johannius, Morelet, from the Comoro Islands, can scarcely be distinguished from some forms of the latter species. This species, which is chiefly confined to the lowlands near the sea-shore, is found beneath decaying vegetation and under loose stones. They vary in size, number of whorls, development of striae, |