SPIRAXIS. 43 



axis faintly through, milky corneous with, chestnut streaks 

 (two on the last, two on penult 'and four on antepenult 

 whorl). Surface glossy, grooved (or plaited), the grooves 

 much narrower, about one-third the width of the flattened- 

 convex plaits, weakening below the periphery of the last 

 whorl and obsolete at the base. There are five plaits in one 

 mm. on the front of the last whorl (see fig. 33). Whorls 

 6!/2, the embryonic shell of 2 whorls, the first 1% smooth. 

 Suture deeply impressed. Aperture piriform, the outer lip 

 moderately and equably arched forward in the middle. 

 Columella moderately sinuous, appearing straight inside <as 

 seen through the last whorl. Length 9.5, diam. 2.4, aper- 

 ture 3 mm. long. Whorls 6%. 



Jamaica. 



Three of these shells were in the typical lot of.- 8. perplexus 

 in Adams' collection at Amherst. It is evidently related to 

 8. micans but differs by the somewhat narrower contour, the 

 more widely spaced 'grooves, by having 'Colored streaks pre- 

 ceding the slightly deeper varix-lines, and by having only 

 1% instead of 214 smooth initial whorls. The difference in 

 sculpture between 8. calus and S. micans is slightly empha- 

 sized in the figures from the former being drawn to a 

 slightly larger scale than 8. micans. 



45. S. VERBERATUS Pilsbry, n. sp. PI. 1, fig. 7. 



Shell long-ovate, thin, corneous, glossy, sculptured with 

 close arcuate longitudinal grooves, obsolete at the base and 

 wanting on the first 1% whorls. There are about 8 or 9 

 striae in the spaice of -a mm. on the face of the last whorl, 

 but they become closer on the back of the whorl. Whorls 5, 

 quite 'convex below the suture, less so elsewhere. Aperture 

 long-ovate; outer lip arched forward 1 . Columella vertical, a 

 little excised near the base, but seen to be weakly sinuous 

 within the last whorl in broken 1 shells. 



Length 5.6, diam. 2, length of aperture 2.75 mm. 



Haiti: Port 'au Prince (J. B. Henderson). 



The very weakly spiral columella is 'characteristic of this 

 species and the next. It is only by looking through the last 



