204 ANTILLEAN OPEAS. 



5. 0. PLICATUM ('Guilding' Pfr.) Unfigured. 



Shell imperf orate, oblong, pale corneous, thin, pellucid, 

 longitudinally closely plicate. Spire obtuse. "Whorls 5, con- 

 vex, the last a little shorter than the spire. Columella nearly 

 straight. Aperture oval; peristome unexpanded, acute, the 

 columellar margin shortly reflexed, appressed. Length 4, 

 diam. 2 mill. Aperture 1% mill, long, 1 wide (Pfr.). 



West Indies (coll. Metcalf ) . 



Bulimus plicatus Guilding, PFR., Monographia Hel. Viv. ii, 

 p. 170 (Bulimulus plicatus Guilding, MSS.) 



Not figured, and known by the above description only. 



6. 0. SANTANENSE (Pfeiffer). PI. 40, fig. 15. 



Shell nearly imperforate, turrited, thin, slightly striatulate, 

 covered with an olive-buff cuticle; spire regularly tapering, 

 the apex acute; suture obsoletely crenulate. Whorls 9, con- 

 vex, the last about two-sevenths the total length, rounded. 

 Columella straightened. Aperture subvertical, truncate-oval ; 

 peristome simple, unexpanded, the columellar margin slightly 

 reflected. Length 11, diam. 3.75, aperture 3x2 mm. (Pfr.). 



Haiti: Pico de Santana in the Sierra Monte Cristi (Hjal- 

 marson) . 



Bulimus santanensis PFR., Mal-ak. Bl. v, 1858, p. 151, pi. 3, 

 f. 14, 15; Monogr. vi, p. 97. Opeas s., CROSSE, J. de Conch. 

 1891, p. 150. 



A conic-turrite shell with very short whorls, known by the 

 unique type only. 



7. 0. ALABASTRINUM (Shuttlewortli) . 



Shell very narrowly perforate, turrite-subulate, remotely 

 costulate-striate, slightly shining, pellucid, white. Spire 

 rather acute. Whorls 7 to 8, a trifle convex, the last scarcely 

 one-fourth the total altitude. Suture deep. Columella 

 straight. Aperture semiovate ; peristome with the right mar- 

 gin slightly sinuous, the columellar margin reflexed, nearly 

 closing the perforation. Length 7, diam. 2. 2, aperture 1.33 

 x .75 mm. (Skuttl.) . 



Porto Rico: San Juan, very rare (Blauner). 



