Verrill and Bush — Marine 3Iollusca of the Bermudas. 53 7 



Lengtb, about 4.5™'" ; breadth, about l.S'"'^. 



This common species resembles C. metaxm Watson, but is stouter 

 with a less attenuated spire, and differs somewhat in the character of 

 the sculpture and in the larger size of the siphonal notch. 



Found in the shell-sand. 



Family C^CID^. 



The following comparatively rare species were dredged in the 

 Ship Channel and Bailey Bay, in 12 to 40 feet, with the very abun- 

 dant CcBcum ternies Heilprin and its varieties. 



Section I. — Levia. — Shell smooth. 

 Caecum tenue, sp. nov. 



Plate LXV. Fig. 5. 



Shell thin, translucent, slender, slightly curved, scarcely tapered, 

 nearly smooth, with microscopic annular lines of growth. Aperture 

 but little oblique, with a thin margin. Plug little prominent, 

 obliquely truncated, most prominent close to the outer margin, with- 

 out a mucro. Pale ilesh color. 



Length, about 1.6'^^"^; diameter, about .SS'""^. 



In shell-sand, rare. 



Section II. — Annulata. — Shell auuulated. 

 Caecum tornatum, sp. nov. 



Plate LXV. Fig. 1. 



Shell slender, rather strongly curved, tapering a little, surrounded 

 by eighteen to twenty-two strongly elevated, sub-acute cingula 

 which, on the convex side, are rather narrower than the interstices, 

 but on the concave side are of about the same width. Aperture 

 round. Plug somewhat prominent, oblique, obtusely rounded, most 

 prominent near the outer margin. 



Some fresh specimens are somewhat translucent and often very 

 pale flesh color, but most of the examples are opaque white. 



Length, 2,5'"'" ; diameter, 0.6"^"". 



A single specimen, apparently the young of this species, is more 

 strongly curved, very slender, and strongly tapered toward the pos- 

 terior end. It is surrounded by numerous, delicate, thin, prominent 

 cingula, separated by wider spaces. 



Rare in the shell-sand. 



