252 SOUTH AMERICAN OBELISCUS. 



I. Large forms, over 50 mm. long. 



a. Summit very obtuse; aperture subvertical. 



0. cuneus, no. 9.. 

 aa. Summit attenuate; aperture oblique. 



0. major, no. 10. 

 II. Smaller forms, 25 too 50 mm. long. 



a. Spire very thick above ; length 5 times the diam. 



0. pairensis, no. 11. 

 aa. Spire regularly tapering; length 3% to 4 times 



diam. 



fr. 39 x 10 mm., whorls 9. 0. haplostylus, no. 12. 



b~b. 27x8 mm., whorls 9. 0. jousseaumei, no. 13. 



b~bb. 36 x 9 mm., whorls 10. 0. cuneus minor, no. 9. 



III. Small, 8x2 mm., with 7 whorls. 0. pusillus, no. 14. 



9. 0. CUNEUS (Pfeiffer). PI. 35, figs. 56, 57, 58, 59. 



Shell imperforate, turriteHclub-shaped, solid, smooth, arcu- 

 ately irregularly substriate, tawny. Spire turrite, the apex 

 rather acute; suture 'minutely crenuiate, bordered with an 

 impressed line. Whorls 10, flat, the last two-sevenths the 

 total length, rounded basally. Columella slightly arcuate, 

 narrowly calloused, flat. Aperture subrhombic-oval ; peri- 

 stome simple, unexpanded, the right margin very slightly 

 arcuate, baisal margin forming an obtuse 'angle with the colu- 

 mella. Length 63, diam. 16, aperture 18.5x10 mm. (Pfr.). 



Ecuador: on the Mira river (Bourcier, type loc.). Nane- 

 gal (Martinez) ; Val de Pilaton, about 3,000 meters above 

 sea level (Boetzkes) ; Los Puentes near Gualea at about 1,500 

 meters, on low herbage in very damp places (Cousin). 



Bulimus cuneus PFR., Proc. Zool. So f c., 1852, p. 154; M'on- 

 ogr., iii, p. 390; Oonchyl. Cab., p. 96, pi. 32, f. 11, 12. 

 HIDALGO, Journ. de Conch., 1870, p. 56 ; Yiaje al Pacifico, 

 Moll., p. 97. Obeliscus cuneus Pfr., MILLER, Malak. BL, xxv, 

 1878, p. 195 ; n, F., i, 1879, pi. 6, f . 3 b, var. minor. COUSIN, 

 Bull. Soc. Zool. de France, xii, 1887, p. 237. Bulimus fair- 

 maireanus PETIT de la SAUSSAYE, JOUTU. de Conch., 1853, p. 

 156, pi. 5, f. 8. 



The surface is glossy, -with only faint striation, and 0ov- 



