304 SOUTH AMERICAN LEPTINARIA. 



Miller states that white eggs 1 mm. in diam. were con- 

 tained in many of the shells. Strebel figures a shell of the 

 original lot (pi. 46, fig. 5) measuring 13.1x5 mm., whorls 

 714. He gives measurements of others, the smallest 7.6x3.1 

 mm., with nearly 5% whorls. The species needs comparison 

 with L. anomala Pfr., with which it may prove to foe identical. 



13. L. RITCHIEI n. sp. PI. 46, fig. 12. 



Shell perforate, ovate-turrite, thin, pale greenish-buff, 

 opaque. Surface slightly shining, densely sculptured with 

 close, sharp, somewhat arcuate striae, the first iy 2 whorls 

 smooth. Spire regularly tapering to the obtuse apex. Whorls 

 5y 2 , convex, parted by a deep suture. Aperture subvertical ; 

 outer lip acute and thin, slightly arched forward above. 

 Columellar margin reflexed. Columella straight above, 

 weakly, obliquely truncate near the base. Length 7.6, diam. 

 3.3, aperture 3 mm. 



Ituchy, on the Purus River. Co-types in coll. A. N. S. P. 

 and J. Ritchie, Jr. 



This peculiar shell has so weak a truncation that it might 

 almost be referred to Opeas. In an oblique view in the 

 mouth the basal excavation of the columella appears stronger 

 than in the front view. It is further distinguished by its 

 close and sharp striation. The specimens are from the col- 

 lection of J. Ritchie, Jr., of Boston. 



14. L. INTERMEDIA n. sp. PI. 40, fig. 12. 



Shell perforate, oblong-turrite, thin, corneous with some 

 scattered yellowish dots. Surface glossy, nearly smooth, with 

 slightly arcuate growth-wrinkles only. Spire rather wide, its 

 outlines convex, summit rather obtuse. Whorls 6y 2 , convex, 

 slowly increasing, separated by deeply impressed sutures. 

 Aperture small, subvertical ; outer lip thin, arching slightly 

 forward. Columellar margin reflexed, nearly closing the 

 perforation ; columella straight above, very obliquely excised 

 but hardly truncate below. Length 9.7, diam. 3.8, length of 

 aperture 3.1 mm. 



Venezuela (Ralph Tate). 



This form stands between Opeas and Leptinaria. The 



