10 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 56. 



callus ; outer lip sharp-edged, with a moderate varix behind it, arcu- 

 ately produced; inner lip with a rather thick layer of enamel; canal 

 distinct, rather wide, somewhat recurved. Height of shell, 17; of 

 last whorl, 8.7; diameter, 6.5 mm. Cat. No. 212367, U.S.N.M. 



Range. — Station 3020, off Cape Tepoca, Gulf of California, in 7 

 fathoms, sand and shelly bottom, United States Bureau of Fisheries. 



This is one of the most elegant of the smaller species of the group. 



ELAEOCYMA ATTALIA, new species. 



Plate 18, fig. 7. 



Shell small, slender, acute, white, polished, with eight flattish 

 whorls exclusive of the (lost) nucleus; suture obscure, appressed, 

 fasciole immediately adjacent, rather wide, and constricted; spiral 

 sculpture of a few incised lines on the base and threads on the canal; 

 axial sculpture of (on the penultimate whorl about fourteen) low 

 feeble ribs, almost knoblike, stronger on the earlier whorls, but which 

 do not reach the base or cross the anal fasciole and which disappear 

 on the last half of the last whorl where there is a moundlike varix 

 and traces of a yellowish spot ; aperture small, anal sulcus deep, with 

 a subsutural callus; oute*r lip thin, sharp, arcuately produced; inner 

 lip and pillar with a thin layer of enamel; pillar short, canal very 

 short and hardly differentiated from the aperture. Height of shell, 

 8.5 : of last whorl, 4 ; diameter, 3 mm. Cat. No. 168677, U.S.N.M. 



Range. — West coast of Mexico, probably near Mazatlan. 



The specimen is translucent white, but is not improbably more or 

 less bleached. 



ELAEOCYMA ARBELA. new species. 



Plate 4, fig. 3. 

 Shell small, glistening, acute, brownish, with the projecting sculp- 

 ture paler; nucleus dark brown, glassy, rather irregularly coiled, of 

 one smooth whorl followed by a peripherally keeled turn and about 

 eight subsequent whorls; suture distinct, appressed, with a nodulose 

 band in front of it where the ends of the ribs are cut off by a very 

 narrow fasciolar constriction; spiral sculpture of a few incised lines 

 cutting only the interspaces between the ribs, on the spire; on the 

 last whorl there are six or seven of these lines, with much wider in- 

 terspaces, followed by three strong cords close-set on the canal; 

 axial sculpture of (on the last whorl about 13) protractively oblique 

 whitish narrow ribs extending from the fasciole to the cords of the 

 canal, with subequal interspaces and not continuous up the spire; 

 incrementatl lines evident, silky; aperture narrow, anal sulcus deep 

 and rounded, with a strong subsutural callus; outer lip sharp-edged, 

 with a feeble varix and a brown spot behind it; inner lip and pil- 

 lar with a thick coat of white enamel, the throat not lirate; canal 



