308 MEXICAN LEPTINARIA. 



1 or iy 2 whorls more finely rib-striate, the riblets persisting 

 on the last whorl to the lip, but obsolete on periphery and 

 base. The axis is imperforate or with a very small chink. 

 Apex smaller than in mexicana from Texolo, V. C. 

 Whorls 6. 



Length 8, diam. 3.9, aperture 3.3 mm. 



Length 8, diam. 3.4, aperture 3.3 mm. 



19. L. MARTENSI (Pfeiffer). PL 41, figs. 6, 8. 



Shell subperforate, turrite-oblong, thin, striatulate and dis- 

 tantly thread-costate, diaphanous, whitish-hyaline ; spire tur- 

 rite, rather obtuse; whorls 6, convex, the last scarcely two- 

 fifths the length, rounded. Columella subdentate-plicate in 

 the middle. Aperture slightly oblique, elliptical-oval; peri- 

 stome simple, unexpanded, the columellar margin widely re- 

 flexed, partly free. Length 9.33, diam. 4.5, aperture 4 x 2.33 

 mm. (Pfr.). 



Mexico: State of Vera Cruz at Cordova (type loc., Salle) ; 

 Mirador (Strebel) ; about 500 ft. above town of Orizaba 

 (Heilprin) ; Antigua (S. N. Rhoads). 



Bulimus martensi PFR., P. Z. S., 1856, p. 318 ; Monogr., iv, 

 p. 451. Spiraxis m., CROSSE & FISCH., Miss. Sci. Mex., Moll., 

 i, p. 619, pi. 25, f. 9. Leptinaria m., MARTENS, Biologia, p. 

 316, with var. inflada (1898). Lamellaxis modesties STREBEL, 

 Beitrag, v, p. Ill, pi. 7, f. 15, pi. 17, f. 5a, 6, 6a, 76, 31. 



The spire is not so high as in L. mexicana, the whorls in- 

 crease more rapidly, and the shell appears more ventricose. 

 The columellar axis is wider than in mexicana, hollow, and 

 not twisted except in the last whorl, so that the spiral fold of 

 the 'Columella is less sharply lamellar than in mexicana. 



Var. modesta Strebel, pi. 41, fig. 7, is more ventricose, with 

 the coarser folds very weak and more separated; length 7.6, 

 diam. 3.4, to length 8.2, diam. 3.5 mm. Misantla. This is L. 

 modestus form A. of Strebel, and var. in flat a of Martens. 



20. L. PITTIERI Martens. PI. 41, fig. 13. 



Shell conoid-ovate, with papillar apex, perforate, thin, sub- 

 pellucid, evenly finely striate, gray-whitish or yellowish-whit- 

 ish. Whorls 6 to 6%, rather flattened, suture quite im- 



