314 BULLETIN OF THE 



Nuclear turns glassy, smooth, tlie others engraved throughout with extremely 

 fine, sharp, well marked spiral stria) crossed by about (on the last whorl 

 twenty- five) rounded smooth moderately elevated strong transverse ribs, very 

 obliquely set, appressed a little at the suture, but with no sharp angles, spines, 

 or irregularities. These ribs are separated by interspaces no wider than the 

 ribs themselves, nearly hiding the spiral sculpture; base handsomely rounded, 

 without disk or cordon, imperforate; aperture subcircular, lip thickened but 

 not varicose. Lon. 5.1, max. lat. 2.0 mm. 



Habitat. Coast of Honduras, Simpson. 



The appearance of this little shell is extremely elegant, owing to the com- 

 pact, neat, clean-cut sculpture, and the peculiar manner in which the side of 

 the whorl next the suture is flattened away from the j)eriphery. I have been 

 unable to find any figure resembling it. The upper figure of Jeffreys's S. semi- 

 disjuncta (P. Z. S. 1884, pi. x. fig. 7), if the whorls were closer together and 

 the varices solid and smooth instead of lamellar and angulate, would look a 

 little like it. It recalls a piece of "stranded" cable in which the separate 

 twines stand out clearly. 



Scala nitidella n. s. 



Shell thin, delicate, with nine well rounded and four nuclear whorls, hav- 

 ing the most brilliant polish; shell white or more generally liberally blotched 

 with cloudy spots of light brown disposed in an irregularly spiral manner 

 along the whorl. Varices nine, frequently continuous, low, narrow, smooth, 

 white, recurved, the tip appressed at the suture on to the preceding whorl. 

 Base rounded, umbilicate, with no spiral sculpture, cordon, or disk; whorls in 

 contact at the suture, which is deep and distinct ; on each whorl, or nearly 

 every one, one of the varices is markedly larger than the others; aperture 

 egg-oval, lip moderately reflected, a little expanded toward the axis anteriorly. 

 Apex acute, whitish, glassy. Lon. 13.5, max. lat. 5.0 mm. 



Habitat. Fifteen to thirty miles off the North Cai'olina coast, in about 50 

 fms., sandy bottom, U. S. Fish Commission. 



This pretty species recalls S. lineolata Kiener, from which, however, it is 

 more than sufficiently separated by the great difference in the number of ribs, 

 the form of the lip, etc. It is remarkable for the brilliant polish of its surface, 

 and is separated from the whole clathrus group by the absence of any basal 

 cordon. 



Scala muscapedia n. s. 



Shell thin, elongated, eight-whorled (without the nucleus) with deep sutures, 

 inflated whorls, and imperforate base ; color white with three rows of brown 

 spots, about one spot to a varix, those on the base roundish, those on the periph- 

 ery elongate pyriforin, and laid on obliquely frontwise and to the right, the 

 posterior series between the last and the suture resembling a faint band; 



