56 PROCEEDINGS OF THE NATIONAL MUSEUM vol.70 



on the body, the outer lip simple, not internally lirate and mostly 

 sharp-edged; pillar with a coat of enamel in adults, short, smooth; 

 canal short, slightly recurved. Length of shell, 4.5; of last whorl, 

 2.5; diameter, 2.4 mm. U. S. Nat. Mus. Cat. No. 108322. 

 Off Georgia, very abundant. 



ASTVRIS (PLECTARIA) EURIBIA, new species 



Shell minute, subfusiform, white, extremely variable, with a smooth 

 blunt nucleus of a whorl and a half and somewhat less than three 

 subsequent whorls; suture distinct, not appressed; whorls rounded; 

 axial sculpture of slightly flexuous narrow riblets, usually with wider 

 interspaces, varying from none at all to 24 on the last whorl, crossed 

 by numerous fine spiral threads, equal and closely spaced over the 

 whole shell, strong in some specimens, obsolete and barely percept- 

 ible in others, not anywhere nodulous; aperture subovate, outer lip 

 nearly straight, hardly thickened, smooth within; body with a thin 

 layer of enamel; pillar short, canal very short, axis pervious. Length 

 of shell, 4; of aperture, 2; diameter, 2 mm. U. S. Nat. Mus. Cat. 

 No. 108205. 



Off Fernandina, abundant. 



The ribs are threadlike, sometimes almost like elevated lines and 

 sometimes hardly more prominent than incremental lines, while the 

 spiral sculpture is very feeble and sometimes hardly perceptible. 



ASTYRIS (PLECTARIA) PROJECTA, new species 



Shell small, slender, white, with a blunt smooth inflated nucleus of 

 a whorl and a half and about four and a half subsequent slightly 

 shouldered whorls; suture distinct, not deep, narrowly appressed; 

 early whorls with about 14 feeble, irregular, narrow riblets crossing 

 the whorls, with wider interspaces, growing feebler with the growth 

 of the shell and obsolete or absent (in the type specimen) on the 

 last whorl ; incremental lines feeble ; spiral sculpture only of a few 

 obsolete lines on the back of the canal; aperture subovate, body 

 erased, outer lip thin, simple, pillar short, twisted, canal hardly dif- 

 ferentiated from the aperture; axis impervious. Length of shell, 6; 

 of aperture, 1.6; diameter, 2 mm. U. S. Nat. Mus. Cat. No. 108004. 



Off Fernandina, one specimen. 



ASTYRIS (PLECTARIA) ALBELLA C. B. Adams 



Pleurotoma albella C. B. Adams, Contr. Conch., vol. 1, p. 63, 1850. 

 Anachis acuta Stearns, Tryon Man., vol. 5, p. 158, pi. 55, fig. 66, 1883. 



Shell small, elongated, slender, white, with a smooth blunt inflated 

 nucleus of a whorl and a half and about four and a half rather flat- 

 sided subsequent whorls; suture distinct, not deep; axial sculpture 

 of (on the penultimate whorl about 14) vertical rounded ribs, cross- 

 ing the whorls on the spire, with subequal interspaces; on the last 



