NO. 2207. WEST AMERICAN MELANELLID MOLLVSKS—BARTSCH. 337 



erately protracted between the posterior angle and the base; inner 

 lip slender, curved, partly reflected over and appressed to the base 

 posteriorly; parietal wall covered with a thui callus. 



The type and four specimens (Cat. No. 251284, U.S.N.M.) were 

 dredged by the United States Bureau of Fisheries steamer Albatross 

 at station 2784, off Chile, in 194 fathoms on blue mud bottom, bottom 

 temperature 51.9°. The type has nine whorls and measures — ^length, 

 5.5 mm.; diameter, 1.3 mm. 



HALIELLA LOMANA Dall. 



Plate 44, fig. 1. 

 Eulima (?) lomana Dall, Proc. U. S. Nat. Mus., vol. 34, 1908, p. 253. 



Shell very large, regularly elongate-conic, creamy white. The 

 early whorls decollated. The succeeding turns slightly rounded, very 

 narrowly and feebly shouldered at the summit, marked by faint, re- 

 tractive, incremental lines, and numerous very regularly incised equal 

 and closely-spaced spiral striations. Suture moderately impressed. 

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

 roimded, marked like the spire. Aperture large, broadly oval, outer 

 hp thin, fractured at the edge ; inner lip rendered slightly sinuous by 

 a twist a Uttle anterior to its insertion; somewhat revolute, entirely 

 free from the base; parietal wall covered by a thin callus. 



The type and another specimen of this species (Cat. No. 110652, 

 U.S.N.M.) were dredged by the United States Bureau of Fisheries 

 steamer Albatross at station 4354, 16 miles off Point Loma Light, 

 California, in 642 to 650 fathoms, on gray mud bottom, bottom tem- 

 perature 38.5° to 39°. The type has nine whorls remainuig and 

 measures — ^length, 20.2 mm. ; diameter, 7 mm. 



Genus SCALENOSTOMA Deshayes. 



Scalenostoma Deshayes, Cat. Moll. He de la Reunion, 1863, pp. 58-60, pi. 7, 

 figs. 26-8, Type Scalenostoma carinatum DeBha,Yea=Subeulima Souverbie 

 Joum. de Conch., vol. 23, 1875, p. 296, Type Subeulima lamberti Souverbie. = 

 Amblyspira Dall, Proc. U. S. Nat. Mus., vol. 19, 1896, p. 314, Type Aclia? 

 (Amblyspira) teres Guppy. 



Melanellids having an acute keel at the peripher}^ of the whorls, 

 which gives to the outer lip of the aperture a }-shapod appearance. 



SCALENOSTOMA RANGII De Folin. 



Plate 45, fig. 4. 



Chemnitzia rangii De Folin, Les Meleagrinicoles, 1867, pp. 61-62, pi. 6, fig. 1. 

 Odostomia (Scalenostoma) rangii Dall and Bartsch, Bull. 68, U. S. Nat. 



Mus., 1909, p. 230. 

 Odostomia (Scalenostoma) rangii Bartsch, Proc. U. S. Nat. Mus., vol. 42, 1916, 



p. 344. 



"Shell imperforate, elongate-conic. Apex rather obtuse, light 

 colored. Whorls smooth, 12 in number. The earher whorls nor- 

 77403— Proc. N. M. vol. 53—17 22 



