536 Verrill and Bush — Marine Mollusca of the Bermudas. 



with Morch's description. A larger fragment has the whorls entirely 

 disunited. It closely resembles the figures of the very much larger 

 species, &. hyalina Sowerby. 



Scala electa, sp. nov. 



Plate LXIV. Fig. 11. 



Shell white, small, stout, regularly conical, consisting of six reg- 

 ularly rounded whorls which are only slightly in contact, so that the 

 suture is very deeply impressed. The body- whorl is crossed by 

 about twelve, rather prominent, slightly thickened, nearly even ribs 

 which are often slightly recurved, but not oblique ; the interstices, 

 which are much wider, are concave and smooth. The ribs converge 

 to, and reach deeply within the umbilicus, which is deep and rather 

 narrow and somewhat obscured by the reflexed inner margin of the 

 aperture. Nucleus small, regular, nearly smooth. Aperture round 

 with a rather strongly thickened margin. 



Length of the largest specimen, 8™™ ; breadth, 4.5'"™. 



Several specimens were found in the dredged shell-sand. 



T^NIOG-LOSSA. 



Family CERITHIOPSID^. 



Cerithiopsis Bermudensis, sp. nov. 



Plate LXV. Fig. 20. 



Shell slender, regularly tapered, composed of ten whorls besides 

 the smooth, prominent, apical whorl. Whorls strongly convex in 

 the middle, excavated above and below the suture so that the latter 

 lies in a rather wide groove. Three prominent spiral cingula are 

 situated on the middle or more prominent part of each whorl, the 

 median one of which is slightly the most prominent ; just below the 

 sutui'e there is a fourth decidedly smaller one, often obsolete on the 

 upper whorls ; on the last whorl there is a spiral carina resembling 

 a fifth cingulum. These cingula are separated by concave grooves of 

 about the same width, both ai'e crossed by delicate costulse which 

 usually give a slightly nodulose appearance to the cingula. Base 

 obliquely subtruncate, smooth. Aperture broad and short ; outer 

 lip broadly rounded, flaring anteriorly and projecting decidedly 

 beyond the columella and separated from it by a deep notch. Colu- 

 mella slightly sigmoid. Color white or pale buff. 



