ART. 18 SMALL SHELLS DREDGED BY "albatross ^' DALL 63 



or varix larger than the others; base imperforate, aperture rounded. 

 Length, 6.5; diameter, 2 mm. U. S. Nat. Mus. Cat. No. 333464. 

 Off Georgia, four specimens. 



Genus OPALIA H. and A. Adams 



OPALIA. sp. indet. 



A fragment of an undescribed Opalia was obtained off Fernandina, 

 which showed about 14 strong low rounded varices and fine silky 

 incremental sculpture crossed by 9 or 10 extremely delicate fine spiral 

 threads with much wider interspaces. The height of the whorl is 5 

 and the diameter 9 mm. U. S. Nat. Mus. Cat. No. 108014. 



OPALIA? DROMIO, new species 



Shell small, solid, white, with a brown reticulate three-whorled 

 acute nucleus and eight well rounded subsequent whorls; suture deep, 

 not appressed, not crossed by the axial ribs; axial sculpture of (on 

 the last whorl 17) rather stout rounded ribs with subequal inter- 

 spaces, not continuous up the spire; spiral sculpture of microscopic 

 faint spiral striae hardly modifying the ribs; basal disk smooth, bor- 

 dered by a raised line; aperture rounded, axis imperforate. Length 

 of shell, 6; of aperture, 1; diameter, 2 mm. U. S. Nat. Mus. Cat. 

 No. 108018. 



Off Fernandina, six specimens 



Family MELANELLIDAE 



Genus MELANELLA Bowdich 



MELANELLA CALLISTEMMA, new species 



Shell small, slender, white, flat-sided, with a blunt apex and about 

 ten whorls; suture distinct, appressed; sculpture of faint incremental 

 lines and an occasional varical stria; base rounded, imperforate; 

 aperture subovate, outer lip thin, simple, somewhat patulous, inner lip 

 short. Length of shell, 5.7; of aperture, 1.3; diameter, 1.6 mm. U. 

 S. Nat. Mus. Cat. No. 108035. 



Off Fernandina, three specimens. 



This is not unlike M. rectiuscula Dall, but the latter is larger and 

 has more rounded whorls. 



MELANELLA OLEACEA Kurtz and Stimpson 



Eulima oleacea Kurtz and Stimpson, Proc. Boston Soc. Nat. Hist., vol. 4, p. 

 1L5, Dec. 185L— Tryon, Man., vol. 8, p. 273, pi. 69, fig. 36, 1886. 



Shell small, straight, conical, translucent white, rarely with pale 

 brownish spiral bands, smooth, polished, with a blunt apex and about 

 a dozen flatfish whorls rather rapidly increasing in diameter; suture 

 obscure, over-glazed; base evenly rounded without an umbilical dim- 

 ple; aperture sublunate, outer lip simple, slightly flexuous, body with 



