ART. 18 SMALL SHELLS DREDGED BY '^ ALBATROSS " BALL 69 



base briefly rounded, aperture rounded, the margin thin, the outer 

 Hp flexuous, a minute chink behind the inner hp. Length of shell, 

 6.7; of aperture, 1.0; diameter, 1.6 mm. U. S. Nat. Mus. Cat. No. 

 108025. 



Off Georgia and Fernandina, verj'^ common. Also in 780 fathoms 

 off Cuba; Dr. W. H. Rush. 



This appears to be the most common species of the region. 



ACLIS LIMATA, new species 



Shell small, acute-conic, thin, translucent white, polished, with a 

 minute blunt apex and about seven whorls; suture distinct, closely 

 appressed, not glazed over; later whorls slightly overhanging the 

 succeeding suture; sculpture of very fine close flexuous incremental 

 lines only visible under magnification; base evenly rounded, imper- 

 forate; aperture ovate, outer lip produced medially, thin, rounding 

 into the arcuate inner lip. Length of shell, 4; of aperture, 0.8; diam- 

 eter, 1.5 mm. U. S. Nat. Mus. Cat. No. 108044. 



Off Fernandina, one specimen. 



This has much the shape of some of the smaller Melanellas, but 

 the thin shell is more like Aclis. 



ACLIS STILIFER, new species 



Shell minute, conic, white, polished, with a small blunt apex and 

 about six moderately rounded whorls, of which the earlier ones are 

 more rapidly attenuated; suture distinct, appressed, not deep or 

 glazed over; sculpture only of faint flexuous incremental lines; aper- 

 ture rounded-ovate, with a thin margin, a narrow chink behind the 

 inner lip, the base briefly rounded. Length of shell, 2.5; of aperture, 

 1.2; diameter, 1.4 mm. U. S. Nat. Mus. Cat. No. 108024. 



Off Georgia and Fernandina, not rare. 



Some of the incremental lines are more deeply impressed than 

 others. 



ACLIS FERNANDINAE. new species 



Shell minute, conical, white, with a very minute blunt smooth 

 nucleus hardly differentiated from the succeeding moderately con- 

 vex whorls; suture distinct, deep; sculpture only of faint incremental 

 lines, some of which at long intervals are deeper than the rest; sur- 

 face polished; base rounded; aperture short, ovate, with simple mar- 

 gins; a slight chink behind the inner lip. Length of shell, 2.9; of 

 aperture, 0.5; diameter, 1 mm. U. S. Nat. Mus. Cat. No. 108047. 



Off Fernandina, three specimens. 



With the form described as typical are others more slender but 

 otherwise entirely similar. This resembles A. stilifer but the increase 

 of the spire is more regular, the last whorl not so conspicuous, and 

 the suture markedly deeper. 



