OPEAS. 349 



Monogr. ii, 259. - - Cf. BOETTGER, Nachrichtsblatt D. Malak. 

 Ges. 1905, p. 180. 



Deshayes states that this species was based upon a single 

 example. His later French description in the Histoire con- 

 tains several obvious errors. It may prove to be identical 

 with D. dunkeri Pfr., but no comparison of dunkeri with the 

 type of A. turritellata 'has been made. Dr. Boettger has 

 suggested that A. turritellata is identical with the West 

 African Subulina or Homorus bacilli formis (Manual vol. 

 XVII, p. 152), but in that the apex is larger. 



The striae as shown in the figures are too emphatic. 



3. 0. TOUSSAINTIANUS n. sp. PI. 5, fig. 6. 



Shell imperf orate, turrite, rather solid though thin, dark 

 chestnut, fading to yellow on the spire and whitish at the 

 summit. Surface very glossy, weakly and finely striatulate, 1 

 Whorls 9y 2 , nearly flat, parted by a linear, slightly serrate 

 suture. Apex rather large, rounded. Aperture subrhombic, 

 slightly oblique, the outer lip thin, somewhat arched forward, 

 columella vertical, prominent in the middle, very obliquely 

 truncate below. In oblique view it is strongly concave above 

 the median prominence. Length 34, diam. 8, aperture 9.9 ; 

 diam at second whorl 2.2 mm. 



Haiti: La Ferriere (Henderson and Simpson).- 

 This species is readily distinguishable from D. dunkeri by 

 its much larger summit and early whorls. The cuticle is 

 very dark on the last two whorls. In other features it closely 

 resembles D. dunkeri. The largest specimen in the Hender- 

 son collection is 37.8 mm. long, 8.7 wide, aperture 10 mm 

 1 mg, with 10 whorls. 



OPEAS SCALARE (Deshayes). PI. 52, fig. 3. 



Shell long-conic, thin, fragile, pellucid, w r hite, pale yellow- 

 ish. Spire long, the apex rather obtuse, scalariform. Whorls 

 8, convex, parted by a deep suture, marked with peculiarly 

 sublamellose, appressed longitudinal striae, very minutely 

 granulose under the lens. Last whorl oblong, quite short, 

 tapering downward, having a very small perforation. Aper- 



