OCR Text |
Show 312 MR. G. F. ANGAS ON N E W [ Mar. 5, Edward Bartlett. For Helix cornu-giganteum, Chemn., read H. guestieriana, Crosse (see Journ. de Conchyliologie, 1868, p. 269, pl. ix. fig. 4 ). A large series of specimens of this latter species were sent home lately from Madagascar by Mr. Waters ; and although I observed certain peculiarities about them on comparing them with typical specimens of H. cornu-giganteum, I then hesitated to separate them from the latter species, regarding them as possibly a local variety, and not being aware at the time that they had been elevated to the rank of a species by M . Crosse. I have now great pleasure in adopting that gentleman's name. Helix guestieriana differs from H. cornu-giganteum, Chemn. ( = H. vesiealis, Lam.), in being somewhat smaller, paler in colour, and more tumid, with the base less flattened and the umbilicus concealed by a callus, and especially by having the inner lip constantly more or less granulated-a character that I do not see referred to in the description of the shell in the French Journal. BULIMUS (OTOSTOMUS) QUADRIFASCIATUS, n. sp. (Plate XVIII. figs. 2, 3.) Shell elongately ovate, rimate, moderately solid, shining, finely longitudinally striated, white, transversely banded with light brown, the last whorl with four bands, the central one being the widest; spire conical, apex obtuse; whorls 6, somewhat convex; aperture oval, equal to the spire; outer lip flattened and expanded at the base. Alt. 1 inch 3 lines, diam. 6^ lines. Hab. Ecuador. BULIMUS (OTOSTOMUS) NAPO, n. sp. (Plate XVIII. figs. 4, 5.) Shell rimate, ovately fusiform, moderately solid, shining, very finely and irregularly striated, pale fawn-colour, with a narrow white band next below the suture and a similar white band surrounding the perforation ; spire sharply conical, somewhat obtuse at the apex; whorls 6, slightly convex ; aperture ovate, same length as the spire ; outer lip expanded and flattened at the base, white behind, bordered by a narrow suffused orange band. Alt. 1 inch 3 lines, diam. 5^- lines. Hab. Ecuador. BULIMUS (EURYTUS) EROS, n. sp. (Plate XVIII. figs. 6, 7.) Shell imperforate, oblong-ovate, thin, very finely and closely sha-greened all over, the apical whorls marked with irregular longitudinal striae, light-greenish olive, ornamented with small spots and cloudy patches of a darker colour; spire very short, apex obtuse, pink; whorls 4, rather convex, the last very large; aperture ovate, more than two thirds the length of the shell, effuse below; outer lip sliglitly expanded and reflexed, which, together with the columella and the interior of the aperture, is of a bright rose-colour. Alt. 1 inch 5^ lines, diam. 8 lines. Hab. Ecuador. |