ART. 18 SMALL. SHELLS DREDGED BY *' ALBATROSS ' ' DALL 43 



ing the axials; aperture subtriangular, the margin continuous, thin, 

 smooth, the pillar lip reflected, with a narrow umbilicus in the adult 

 but none in the young; the pillar shows no plaits, from in front none 

 are visible; the anterior end of the aperture not channelled. Length 

 of shell, 4; of aperture, 2; diameter, 2.5 mm. U. S. Nat. Mus. Cat. 

 No. 107987. 



Off Georgia and Fernandina; also Campeche Bank and off Yucatan 

 in 200 to 780 fathoms. 



This exact position of this species in the family is doubtful; the 

 plaits are generally absent at the aperture, and the internal pillar 

 shows only one rather strong plait, yet in every other respect it 

 agrees well with such species as A. couthouyi Jay. 



ADMETE NODOSA Verrill and Smith 



Admete nodosa Verrill and Smith, Trans. Conn. Acad., vol. 6, pt. 2, p. 

 419, pi. 44, fig. 9, 1885, 



Off Fernandina, three young shells probably of this species. Also 

 off Nantucket and south of Long Island, New York, in 816 and 924 

 fathoms. 



The shell has two well marked plaits. 



Family OLIVELLIDAE 



Genus OLIVELLA Swainson 



OLIVELLA TUBULATA Dall 



Olivella tubulata Dall, Bull. Mus. Comp. Zool., vol. 18, p. 136, 1889. 

 Off Fernandina, a fragment of this species was obtained. 



OLIVELLA BULLULA Reeve 



Olivella bullula Reeve, Conch. Icon., Oliva, pi. 30, fig. 96, 1850. 



Off Fernandina, one juvenile specimen. 



It was found by the Blake about Cuba, off Sombrero and St. Vin- 

 cent, West Indies, in 72 to 464 fathoms. 



Family MARGINELLIDAE 



Genus MARGINELLA Lamarck 



Subgenus Marginella s. s. 



MARGINELLA FERNANDINAE, new species 



Shell small, white, polished, anteriorly attenuated, with a blunt 

 apex and about four and a half whorls, the aperture nearly as long 

 as the shell; suture obscure, overlaid with enamel; aperture narrow* 

 outer lip heavily thickened, with about 16 crenulations, varicose, 

 with a marked channel behind it; there is no spiral sculpture; axial 

 sculpture of more or less obvious incremental lines ; body thinly glazed , 

 with four subequal plaits, the anterior evenly rounded about a shallow 



