336 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.53. 



The type (Cat. No. 251282, U.S.N.M.) was dredged by the United 

 States Bureau of Fisheries steamer Albatross at station 2808 off the 

 Galapagos Islands, in 634 fathoms, on coral sand bottom, bottom 

 temperature 40°. The last five whorls only remain in our specimen, 

 but they are so distinct from any other that the species will readily 

 be recognized by them. These measure — length, 3.9 mm.; diameter, 

 1,3 mm. 



Geniis HALIELLA Monterosato. 



Haliella Monterosato, Enum. & Syn., 1873, p. 35, Type, Ealiella stenostoma 



(Jeffreys). 



Melanellids in which the inner lip is provided with a twist which 

 gives it the appearance of having an obsolete fold. 



HALIELLA ABYSSICOLA, new species. 



Plate 43, fig. 8. 



Shell elongate-conic, straight, semitransparent, pohshed, bluish- 

 wliite, marked by scarcely perceptible lines of growth. Whorls 

 slightly rounded, rather high between the sutures ; the appressed por- 

 tion of the summit appearing as a naiTow white band, the posterior 

 limit of which forming the suture is scarcely perceptible since it prac- 

 tically fuses with the preceding turn. Periphery of the last whorl 

 well rounded. Base moderately long, well rounded. Aperture very 

 large, ear-shaped; posterior angle acute; outer lip very thin, becom- 

 ing gradually protracted from the posterior angle to the periphery, 

 then more rapidly retractive toward the base, basal portion of the 

 outer lip forming a broad, rounded channel; inner lip long, decidedly 

 sigmoid, slightly reflected and partly appressed to the base, provided 

 with a twist a little anterior to its insertion; parietal wall covered 

 with a thin callus. 



The type (Cat. No. 251266 U.S.N.M.) was dredged by the United 

 States Bureau of Fisheries steamer Albatross at station 2923, off 

 Southern California, in 822 fathoms, on green mud bottom, bottom 

 temperature 39°. It has 10 whorls and measures — length, 10.4 mm.; 

 diameter, 2.9 mm. Cat. No. 251265 U.S.N.M. was also collected by 

 the Albatross at station 4368, off Point Loma Light, California, in 215 

 to 240 fathoms, on green mud. Cat. No. 266887 U.S.N.M. contains 

 still another specimen of this species dredged off San Pablo Point, 

 Mexico, by the Albatross at station 5675, in 284 fathoms, on green 

 mud and fine sand bottom, bottom temperature 44.8° 



HALIELLA CHILENSIS, new species. 



Plate 43, fig. 6. 

 Shell elongate-conic, slender, semitranslucent to bluish-white, pol- 

 ished, surface marked by exceedingly fine lines of growth only. 

 Whorls almost flattened, separated by a scarcely defined suture. 

 Periphery of the last whorl well rounded. Base moderately long, 

 well roimded. Aperture ovate ; posterior angle acute ; outer Up mod- 



