SOUTH AMERICAN OBELISCUS. 255 



of the columella and the obliquity of the lip is well seen by 

 comparing fig. 58 (cuneus) with fig. 60 (major). 



A smaller specimen is drawn in fig. 66. Length 57, diam. 

 13.4, aperture 15 mm., whorls 11%. It is typical in other 

 respects. 



Another lot of two specimens, fig. 67, differs in having the 

 contraction of the apical fourth more pronounced, and the 

 last whorl more inflated, causing a change in the shape -of the 

 aperture, which is wider below. They are otherwise like the 

 types. 



Length 64.3, diam. 17, aperture 18.8 'mm., whorls 11%. 



Length 60.2, diam. 17, aperture 18.7 mm., whorls 11. 



11. 0. PAIRENSIS (Higgins). PI. 36, fig. 82. 



Shell imperforate, turrite, rather thin, smooth, obliquely 

 striate, yellowish- tawny. Spire turrite, the apex obtuse, 

 suture crenulate-margined. Whorls 10, flat, the last about 

 one-fourth the total length, tapering basally. Columella cal- 

 lous, slightly arcuate. Aperture oblique, acuminate-oval; 

 peristome simple, unexpanded, the right margin somewtoat 

 sinuous. Length 47, diam. 9 mm. (Higg.). 



Ecuador: Paira (Mr. Clarence Buckley). 



Rumina (Stenogyra) pairensis HIGGINS, Proc. Zool. Soc. 

 Lond., 1872, p. 685, pi. 56, f. 1. Bulimus p., PFR., Monogr., 

 viii, 128. 



Remarkable for its thick spire and narrow, dub-like shape. 

 It evidently stands close to 0. cuneus. 



12. 0. HAPLOSTYLUS (Pfeifer) . PL 36, figs. 68, 69. 



Shell imperforate, turrite, rather thin, mibarcu'ately cos- 

 tulate-striate, diaphanous, yellowish- green. Spire long, ob- 

 tuse. Whorls 9, rather flat, the last nearly smooth, two- 

 sevenths the total length. Columella very simple, arched 

 inward. Aperture oblong-oval, peristome simple, acute. 

 Length 39, diam. 10, aperture 11x5.5 mm. (P/V.). 



Ecuador: El Catamaija near Loxa (Hartweg, type loc.) ; 

 Cuenca (Martinez) ; Los Puentes (Cousin). Peru: Tambillo 

 (Stolzmann). 



