1879.] MOLLUSCA OF COSTA RICA. 477 



of Navarro, and found on the leaves of trees. I now consider it 

 (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 (Solaropsjs) 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 comesnearest to H. andicola, Pfr., from South America ; 

 but the latter has the 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 some- 

 what 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 alti- 

 tude of from 3000 to 6000 feet. 



" Foot broad, pointed, and very flat. Animal varies with the 

 colour of the shell from white to ash-colour, greenish white, or light 

 brown " (Gabb). (Plate XL. fig. 3 a.) 



This pretty species was sent as "B. irazuensis 1 , Angas," but is 

 totally distinct from it, the only character in common being the 

 rose-coloured peritreme. 



