282 DIAPHANA. 



surface covered with distinct punctate spiral lines. The outer lip 

 rises considerably above the level of the body whorl, arches well 

 forward, and follows the curvature of the body whorl to near the 

 base, where it is a little expanded, and joins the columella in a broad 

 curve. The inner lip is formed by a rather wide, closely adhering 

 layer of enamel, which is considerably thickened on the columella, 

 spreading out over the umbilical region with a thick, free outer 

 edge. The spiral lines are distinct and rather coarsely punctate, a 

 little crowded on the apex of the shell, nearly uniformly separated 

 to just below the centre (five to the millimeter), where there are two 

 quite fine, widely separated ones, below which they become again 

 coarser and considerably crowded on the base. Epidermis thin, very 

 slightly tinged with yellow. Lines of growth inconspicuous. 



Length of shell, 8 mill.; breadth, 5'5 mm.; length of aj^erture 

 8-5 mill. (Bush). 



Of Cape Lool-out, N. C, in 603 fms. 



Diapliana (f) lottct Bush, Bull. M. C. Z. xxiii, p. 222, pi. 2, f. 

 8,9. 



A smaller, somewhat worn specimen (No. 45,604), difl^ering from 

 the above only in having fewer spiral lines, was dredged by the LT. 

 S. F. C. in 1882, at Station 1142, off Martha's Vineyard, in 322 

 fathoms. 



This species bears considerable resemblance to Cylichna occulta 

 Migh. & Ad. ; but that is a much smaller and more slender species, 

 more gradually tapered toward the ends, with finer and more 

 numerous spiral lines. 



D. SEGUENZ^ Watson. PI. 26, figs. 76, 77. 



Shell small, oval, glossy, finely spirally stippled, with the large 

 open mouth and simple lips of a Bulla, but with a small prominent 

 mamillate apex. Sculpture: Longitudinals— there are over the 

 whole surface fine close lines of growth. Spirals — there are fine 

 sharp lines made of minute round stippled dots; above, these lines 

 are ci'owded, in the middle they are sparse, towards the poii'.t they 

 are again closer. Colour semi-transhicent white, with a greyish sur- 

 face. Spire very short and blunt, sometimes not raised at all. Apex 

 a small but coarse, slightly prominent, mamillate tip. Suture im- 

 pressed. Mouth resembling that of a Bulla and shaped like a long 

 bent pear. Outer lip rises slightly above the body, sometimes to a 



