AKT. 18 SMALL SHELLS DREDGED BY '' ALBATROSS '' DALL 45 



shallow, with anoverglaze; whorls slightly convex; aperture ample, 

 outer lip smooth, thin, not sharp edged, nearly straight, not varicose; 

 pillar and border with a wash of enamel, the former with four sub- 

 equal thin plaits, the anterior rounding into the outer lip with a very 

 shallow sulcus. Length of shell, 5; of aperture, 4; diameter, 3.5 

 mm. U. S. Nat. Mus. Cat. No. 107976. 



Off Fernandina, numerous specimens. 



This is similiar to M. tanora but larger, slightly more slender, more 

 delicate, and with a less heavy outer lip. 



MARGINELLA INEPTA, new species 



Shell small, thin, subcyhndric, white, polished; the apex bluntly 

 rounded-conical, of three whorls; aperture nearly as long as the 

 shell, ample, the outer lip slightly thickened, simple, nearly straight; 

 a narrow sinus behind, hardly any in front, the short pillar with 

 three subequal plaits. Length of shell, 7; of aperture, 6; diameter, 

 4 mm. U. S. Nat. Mus. Cat. No. 107974. 



Off Georgia and Fernandina, not rare. 



MARGINELLA IMMITATOR, new species 



Shell minute, biconic, blunt, white, with about three and a half 

 polished whorls; suture minutely appressed, not glazed over; aperture 

 more than half as long as the shell, rather wide, outer lip thickened, 

 varicose, receding behind aud before, not crenulate; pillar with four 

 subequal plaits including that on its anterior edge which rounds 

 evenly into the outer lip. Lengthof shell 2.6; of aperture, 1.6; diam- 

 eter, 1.6 mm. U. S. Nat. Mus. Cat. No. 108332. 



Off Georgia, one specimen. 



Much smaller, but like M. incessa in form. 



MARGINELLA MICROGONIA , Dall 



Marginella microgonia Dall, Bull. U. S. Nat. Mus. No. 37, 1889, p. 108 

 (name only). 



Shell minute, short, stout, white, with a low spire coverd by an 

 overglaze, the aperture shorter than the shell, subequally wide 

 throughout its length, the outer lip smooth with no groove behind it, 

 the pillar with four plaits; surface smooth except at the shoulder 

 which carries 10 to 15 minute axial riblets. Length, 3; diameter, 

 2 mm. U. S. Nat. Mus. Cat. No. 107975. 



Off Georgia and Fernandina, abundant. 



The diagnosis of this species was inadvertently overlooked in 1889. 



MARGINELLA ESTHER, new species 



Shell small, elongate-ovate, polished, white, thin, with nearly four 

 whorls and a verj^ blunt apex; suture appressed, not deep, not glazed 

 over; whorls only moderately convex; aperture ample, outer lip thin. 



