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Show 1879.] MOLLUSCA OF COSTA RICA. 477 of Navarro, and found on the leaves of trees. I now consider (after a careful examination of all the specimens) to be an extreme variety of H. costaricensis. " Animal dark grey above, foot white" (Gabb). High hills only ; commonest in Cabecar. About a dozen living and a number of dead specimens found, varying in size and coloration. 5. HELIX (SOLAROPSIS) TILORIENSIS, n. sp. (Plate XL. fig. 2.) Shell minutely and profoundly umbilicated, depressedly globose, thin, ornamented with oblique transverse rows of minute granules, from which spring very short, erect, dark brown bristles ; pale brown, with one narrow band of dark chestnut towards the basal portion of the last whorl, and another similar band above near the suture-the space between it and the suture, as well as the upper whorls, being crossed with wavy dark chestnut markings, whilst the central portion of the body-whorl is ornamented with light brown transverse angular markings that form a very narrow indistinct band in the middle of the whorl. Whorls 4|, the last very large and rounded, the upper whorls flat; spire concavely depressed ; aperture broadly crescent-shaped; outer lip arcuate, a little reflexed; columellar margin slightly expanded over the umbilicus. Diam. maj. 9, min. 7\, alt. 5 lin. Hab. Hills between the rivers Tilorio and Zhorquin. Only three specimens found. This species comes nearest to H. andicola, Pfr., from South America; but the latter has tbe spire raised above the plane of the last whorl, the granules much more numerous, and not set in regular oblique rows, and has also a different style of coloration. 6. BULIMUS GABBI, n. sp. (Plate XL. fig. 3.) Shell imperforate, somewhat elongately ovate, moderately solid, faintly, obscurely, longitudinally striated, shining, straw-colour; the entire peritreme bright rose-colour ; whorls 5, convex; spire shorter than the aperture; aperture large, effuse, oblique ; outer lip somewhat thickened and expanded. Var. a. Pinkish brown, obscurely banded with darker brown, and freckled and spotted with white. Var. b. Opaque white, marked with a few irregular bands of dark brown arrow-shaped spots. Var. c. White, with two or three brown bands spotted with white. Diam. 7, alt. 10| lin. Hab. On the ground, upon the flanks of Pico Blanco, at an altitude of from 3000 to 6000 feet. " Foot broad, pointed, and very flat. Animal varies with the colour of tbe shell from white to ash-colour, greenish white, or light brown " (Gabb). (Plate XL. fig. 3 a.) This pretty species was sent as "B. irazuensisl, Angas," but is totally distinct from it, tbe only character in common being the rose-coloured peritreme. |