316 MEXICAN LEPTINARIA. 



The surface is somewhat smoother than in L. simpsoni. 

 There is no trace of spaced riblets. The coluuiella in oblique 

 view (fig. 29) is seen to be very wide and distinctly truncate, 

 and the umbilical fissure is more ample than in any other 

 Mexican or Central American species I have seen. 



32. L. BIOLLEYI Martens. PI. 41, fig. 18. 



Shell oblong-conoid, rimate, thin, lightly costulate, yellow- 

 ish or whitish, diaphanous. Whorls 6, a little convex, the 

 suture moderately impressed, last whorl moderately rounded 

 basally. Aperture subvertical, obliquely piriform, the outer 

 margin regularly arcuate, forwardly convex, basal margin 

 narrowly rounded, columellar margin vertical, very obliquely 

 truncate and encircled with a thin, slender lamella. Pari- 

 etal wall unarmed. Length 6 to 7, diam. 3, aperture 3x2 

 mm. (Marts.) . 



Costa Rica: near San Jose, among moss (Biolley) ; Tala- 

 manca (Pittier). 



L. biolleyi MARTS., Biologia, p. 319, pi. 18, f. 14 (June, 

 1898). 



Allied to L. salleana Pfr. from Haiti, but with more feeble 

 columellar margin (Marts.). 



33. L. COSTARICANA Martens. PI. 41, fig. 19. 



Shell ovate-oblong, subturrite, rimate, rather solid, striat- 

 ulate, glossy, pale yellowish. Whorls 6 to 7, a little convex, 

 regularly increasing, the suture moderately impressed, sub- 

 gradate, the last gradually tapering basally. Aperture a 

 little oblique, trapezoidal, the outer margin rather straight, 

 basal broadly rounded, columellar margin obliquely truncate, 

 vertically ascending, encircled with a narrow spiral lamella. 

 Parietal wall unarmed (Marts.). 



Length 9, diam. 4, aperture 3 to 4 mm. 



Length 6 to 7, diam 3, aperture 3 mm. 



Costa Rica: San Jose, Terraba, El Pital in the Rio Nar- 

 anjo valley, plain of Rio Oorredor, in the Golfo Dulce region, 

 Quebrada de Java and springs of Djiri Durunia, in the Rio 

 Bras valley, and valley of Rio Diquis (Pittier). 



L. costaricana MARTS., Biologia, p. 320, 639, pi. 18, f. 15 

 (June, 1898). 



