20 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 70 



narrow channel behind it. Height, 3; maximum diameter, 1.5 mm. 

 U. S. Nat. Mils. Cat. No. 107913. 

 Off Fernandina, five specimens. 



ACTEON PARTICOLOR, new species 



Shell small, short, rotund, smooth, white with three brownish spi- 

 ral bands on the last whorl; apex blunt, nucleus completely immersed, 

 visible whorls about four, moderately rounded, separated by a dis- 

 tinct suture; aperture sublunate, outer lip thin, sharp, arcuate, round- 

 ing evenly in front to the slightly thickened strongly twisted pillar 

 behind which is a minute chink; the last whorl comprises most of 

 the shell. Height of shell, 3.5; of last whorl, 2.8; diameter, 2 mm. 

 U. S. Nat. Mus. Cat. No. 108274. 



Off Georgia, one specimen. 



The brown bands are liable to fade in the cabinet, even if kept in 

 the dark. 



ACTEON JUVENI3, new species 



Shell minute, white, with a bluntly immersed nucleus and four 

 moderately convex whorls; suture channelled with the whorl in front 

 of it minutely narrowly tabulate; sculpture of (on the last whorl 

 about a dozen) spiral conspicuously punctuate uniform grooves, cov- 

 ering the whorl; base imperforate, pillar with a feeble obscure plait 

 lagging behind the aperture; outer lip thin, aperture narrowly ovate. 

 Height, 3; diameter, 2 mm. U. S. Nat. Mus. Cat. No. 107915. 



Off Fernandina, four specimens. 



The sculpture resembles that of A. Jiebes, jr., but the shell is much 

 more slender. 



ACTEON LIOSTRACOIDES, new species 



Shell small, translucent white, slender, with a blunt apex and nearly 

 six whorls; surface polished, smooth except for microscopically fine 

 spiral striae over the whole surface, stronger on the base; suture ap- 

 pressed, distinct, sides flatly compressed, the last whorl longer than 

 the spire; aperture narrow, about two-thirds the length of the last 

 whorl; outer lip sharp, thin, slightly arcuate, rounding evenly into 

 the short slightly thickened arcuate pillar which carries an obscure 

 fold; body without enamel. Height, 7; maximum diameter, 2.7 mm. 

 U. S. Nat. Mus. Cat. No. 107917. 



Off Fernandina, 15 specimens. 



At first sight this shell might be mistaken for a Melanella. Its 

 nearest relative seems to be A. niiidus Verrill, than which it is more 

 slender, acute, and flat-sided. 



ACTEON PROPIUS, new species 



Shell small, white, rather slender, with a large bluntly immersed 

 nucleus, distinct slightly shouldered suture and about five moderately 



