302 SOUTH AMERICAN LEPTJNARIA. 



glossy, sculptured with, delicate, oblique, arcuate growth-striae. 

 Whorls 8, moderately convex, crenulate at the suture; spire 

 produced, somewhat obtuse at the apex. Aperture small, in- 

 versely auriform, nearly one-fourth the total length ; lip very 

 thin, obliquely arcuate; columella rather straightened, nar- 

 rowly reflexed above, subtruncate or plicate below the middle. 

 Length 10.5, diam. 3, aperture nearly 3 mm. long (Smith). 



Trinidad: Oropouche (Urich in coll. J. H. Ponsonby). 



Subulina (Nothus) urichi E. A. SMITH, Journal of Con- 

 chology, viii, July, 1896, p. 235, pi. 8, f. 2. 



"Rather larger than Opeas micro,, more glossy, and with a 

 plicate or subtruncate columella. Smaller and more slender 

 than 8. simplex, also with finer lines of growth" (Smith). 

 The figure shows no truncation of the columella, and looks 

 more like an Opeas. In some other species also the trunca- 

 tion is very weak. 



South American Species. 



L. lamellata (species no. 1) is widely spread in South 

 America. The others now known are, with the exception of 

 L. perforata, more slender and lengthened forms with no pari- 

 etal lamella. Their number will probably be greatly increased 

 when the country is searched for small shells. 



10. L. PERFORATA (Pfeiffer). 



Shell perforate, ovate-turrite, arcuate-striate, thin, whitish- 

 hyaline. Spire elongate, the apex acute. Whorls 7, convex, 

 distantly plicatulate at the sutures, the last whorl slightly 

 more than one-third the total length. Parietal lamella min- 

 ute. Aperture slightly oblique, sinuate-oval, acuminate ; colu- 

 mella with a twisted lamina ; peristome thin, the right margin 

 unexpanded, arched forward above; basal margin expanded; 

 columellar margin reflexed. Length 18, diam. 7.5, aperture 

 7x3.5 mm. (Pfr.). 



Venezuela (Pfr.). 



Tornatellina perforata PFR., Proc. Zool. Soc. Lond., 1856, 

 p. 336; Monographia, iv, p. 653. Leptinaria ( ?) perforata 

 PFR., Nomencl. Hel. Viv., 1878, p. 336. 



An unfigured species, larger than any other except L. hel- 



