AiiT. 18 SMALL SHELLS DREDGED BY '' ALBATROSS '' DALL 57 



whorl fainter and obsolete beyond the periphery, the incremental 

 lines faint; spiral sculpture confined to the canal, of fine close threads; 

 aperture narrow, outer lip thin, with a slight thickening behind it, 

 smooth inside; pillar nearly straight; canal well defined; axis mi- 

 nutely pervious. Length of shell, 8; of aperture 2.5; diameter, 2.5 

 mm. U. S. Nat. Mus. Cat. No. 108007. 



Off Fernandina, numerous. 



This is quite close to C. verrilli Dall, and may prove identical; one 

 specimen shows brownish obscure color marks, but these may be 

 accidental. 



ASTYRIS (PLECTARIA), sp. indet 



A species of Astyris, too dilapidated to identify specifically, was 

 collected off Georgia (No. 108325) and there are similar specimens 

 in the collection dredged off Fowey Rocks, Florida Strait, in 209 

 fathoms, by the late John B. Henderson, jr. 



Section PAEASAGENA Dall, 1924 



Shells resembling Astyris, but with a sharply cut, open reticular 

 sculpture. 



Type. — Astyris (Parasagena) georgiana Dall. 



ASTYRIS (PARASAGENA) GEORGIANA Dall 



Astijris {Parasage7ia) georgiana Dall, Proc. Biol., Soc. Wash., vol. 37, p. 87, 

 1924. 



Shell small, translucent white, biconic, with a smooth white inflated 

 nucleus of a whorl and a half, and about four subsequent moderately 

 convex whorls; suture distinct, not appressed, with an elevated 

 thread on its anterior margin; axial sculpture of (on the last whorl 

 12 to 14) narrow vertical rounded ribs with wider interspaces, cross- 

 ing the whorls, and rather conspicuous incremental lines; spiral 

 sculpture of (on the spire two, on the last whorl about nine) very 

 distinct equal fine threads, over running the ribs without nodulation, 

 with wider interspaces, more close on the base, and fine intercalary 

 striae, chiefly visible in the interspaces and there minutely reticu- 

 lating the incremental lines; aperture rather narrow, the outer lip 

 hardly thickened except when coincident with a rib, smooth inside; 

 the body and pillar short, the canal hardly differentiated from the 

 aperture. Length of shell, 5; of aperture, 2.5; diameter, 2.5 mm. 

 U. S. Nat. Mus. Cat. No. 108311. 



Off Georgia, many specimens. 



This species has a vitreous appearance and the wide shallow retic- 

 ulation is notable. 



ASTYRIS (PARASAGENA) SAGENATA, new species 



Shell small, whitish, with a smooth nucleus of one and a half 

 whorls and about three or four and a half subsequent whorls; suture 



