MEXICAN LEPTINARIA. 311 



Tornatellina interstriata TATE, Amer. Journ. of Conch., v, 

 p. 957, pi. 16, f. 5 (1870). PFE., Monogr., viii, p. 259. Lep- 

 tinaria i., ANGAS, P. Z. S., 1879, p. 485. MARTENS, Biologia, 

 p. 318. 



This species, described and figured from a 'co-type, is closely 

 related to L. mexicana, but the columellar lamella is much 

 more strongly developed. 



24. L. CRENULATA Martens. PI. 41, fig. 21. 



Shell acutely ovate, rim ate-perf orate, rather solid, sculp- 

 tured with rather distant, submembranous riblets, vanishing 

 on the last whorl, and fine interstitial striae; yellowish- white, 

 rather glossy. Whorls 6, somewhat flat, the suture bordered 

 by an angle and finely crenulated, the last whorl rather swol- 

 len basally. Aperture a little 'oblique, ovate, the outer margin 

 slightly arched forward, the basal rather 'broadly rounded; 

 lower third of the columellar margin thin, vertically ascend- 

 ing; its upper two-thirds wide, a little concave and encircled 

 with a thin, distinct, spiral fold, not toothed. Parietal wall 

 covered with a thin callus, emarginate above. Length 11, 

 di<am. 6, aperture 5x3 mm. (Marts.). 



Costa Rica: Uren, near Talamanca (Pittier). 



L. crenulata MARTS., Biologia, p. 318, 639, pi. 18, f. 12 

 (1898). 



' ' The angular line bordering the suture is distinctly visible 

 when the shell is viewed in certain positions, but in others 

 it appears only as a sudden change in the convexity; it IB 

 more distinct in the last whorl. The crenulation or indentar- 

 tion of the suture is rather faint. I have seen only one speci- 

 men, which shows, at some distance behind the aperture, two 

 slightly thickened and more darkly colored interruptions of 

 growth (varices), proving that it is a full-grown individual" 

 (v. Mts.). 



25. L. SINISTRA Martens. PI. 42, fig. 32. 



Shell conoidal, openly perforate, vertically striatulate, pale 

 gray-yellowish, diaphanous, thin. Whorls 6, a little convex, 

 the last rounded, ibase convex, smooth. Aperture vertical, 

 rhombic, the outer margin a little convex, basal margin 



