AUT. 18 SMALL SHELLS DREDGED BY '* ALBATROSS '^ DALL 109 



Family VITRINELLIDAE 



Genus VITRINELLA C. B. Adams 



VITRINELLA GEORGIAN A, new species 



Shell minute, glassy white, low turbiniform, with about three and 

 a half smooth, well-rounded whorls; nucleus minute, suture distinct, 

 not deep; aperture subcircular, the peristome interrupted by the 

 body whorl, not reflected, sharp; base roundly convex, with a minute 

 perforate umbilicus, partly shadowed by the inner lip. Height 1.6; 

 diameter, 2 mm. U. S. Nat. Mus. Cat. No. 329375. 



Seven specimens of different ages were obtained off Georgia. 



Genus BASILISSA Watson 



Subgenus Ancistrobasis Dail 



Ancislrobasis Dall, Bull. Mus. Comp. Zool., vol. 18, p. 383, 1889. T3'pe 

 Basilissa costulata Watson, Dall, Bull. Mus. Comp. Zool., vol. 18, pi. 23, 

 figs. 4, 4a., 1889. 



ANCISTROBASIS COSTULATA Watson. 



Basilissa costulata Watson, Journ. Linn. Soc, vol. 14, p. 600, April, 1870; 

 Challenger Rep., Gastr., p. 103, pi. 7, figs. 11, 11a., 1886. 



Off Georgia, four specimens. Yucatan Strait in 640 fathoms; and 

 Sand Key, in 15 fathoms, Blake expedition; oft' Culebra Island, West 

 Indies, in 390 fathoms, pteropod ooze. Challenger expedition. 



Watson's figure is inaccurate in showing the edge of the whorl 

 rounded, while his description says " sharply angulated." The figure 

 in the Bulletin of the Museum of Comparative Zoology (vol. 18, pi. 

 23, figure 4a.), is accurate. 



Subgenus Basilissa s. s. 



BASILISSA WATSONI, new species 



Basilissa superba Watson (young), Dall, Mus. Comp. Zool., vol. 18, p. 384, 

 1889. 

 Shell small (immature?), white, flatly conical, with a glassy minute 

 nucleus of one whorl and seven subsequent whorls; suture closely 

 appressed, not impressed; whorls above the base flat; axial sculpture 

 of many protractively flexuous extremely fine lines with wider inter- 

 spaces over all the whorls; the cemented edges at the suture by their 

 opacity look like a presutural band, but this is not reflected in the 

 sculpture; spiral sculpture on the spire of almost microscopic close 

 striae; on the base there are about a dozen fine spiral grooves between 

 the edge of the umbilicus and the periphery, a little coarser near the 

 carina; base nearly flat, sharply carinate at the periphery; the umbil- 

 icus funicular, deep, the verge carinate; aperture quadrate, slightly 

 oblique, the margin thin, sharp, simple. Height of shell, 4; of last 

 whorl, 2; diameter, 5 mm. U. S. Nat. Mus. Cat. No. 94940. 



