SUBULINA. 225 



2. S. YATESI (Pfeiffer). 



Shell turrite, rather thin, lightly striatulate, diaphanous, 

 waxen; the spire regularly tapering, apex obtuse; suture deep. 

 Whorls 7, convex, the last slightly over one-fourth the total 

 length, subangular below the middle. Columella arcuate, 

 obliquely distinctly truncate. Aperture slightly oblique, oval- 

 rounded; peristome simple, unexpanded. Length 11, diam. 

 3.5, aperture 3x2 mm. (Pfr.). 



Peru: Moyobamba (Yates, in Pfr. coll.). 



Achatina yatesi PFR., P. Z. S. 1855, p. 99; Monographia 

 iv, 613. 



An unfigured form, somewhat smaller than S. octona though 

 no very tangible differential characters are given in the 

 diagnosis to separate Yatesi from that common species in an 

 immature stage. 



3. S. CONFUSA (Pfeiffer). PI. 40, fig. 6. 



Shell elongate, subcylindric, striatulate, glossy, pellucid, 

 greenish-hyaline. Spire elongate, the apex tapering in a short 

 cone. Whorls 7, a little convex, the last a little exceeding one- 

 fourth the total length, subcompressed laterally. Columella 

 lightly twisted, obliquely truncate at base. Aperture oblique, 

 subrhombic-oval ; peristome simple, unexpanded. Length 11.5, 

 diam. 3.33, aperture 3 mm. long (Pfr.). 



Habitat unknown (Mus. Cuming). 



Achatina confusa PFR., Zeitschr. f. Malak. 1852, p. 63; 

 Monogr. iii, 501. Bulimus bacterionides SOWERBY, Conch. II- 

 lustr. f. 83. REEVE, Conch. Icon, v, pi. 68, f. 482 (not of 

 Orbigny). 



Orbigny 's B. "bacterionides is apparently referable to 

 Obeliscus, while the shell figured under that name by Sowerby 

 and Reeve seems to be a Subulina. Like the preceding species, 

 this still needs elucidation. Reeve 's figure is copied. 



4. S. PARANA n. sp. PI. 40, fig. 8. 



Shell imperforate, turrite, thin, corneous, often faintly 

 brown-tinted on the spire. Surface glossy, very densely and 

 finely striate, the striae weaker on the base, and absent on the 

 two apical whorls, where they are represented by a fine 



