580 REPORT OF COMMISSIONER OF FISH AND FISHERIES. [78] 
Mangilia rubella Kurtz.and Stimpson. 
B. range, 14 fathoms;f 15 fathoms.* 
Mangilia cerina (Stimp.) Verrill. 
B. range, 14 to 15 fathoms.t 
Mangilia ephamilla Bush, sp. nov. 
B. range, 14 to 15 fathoms; + 48 fathoms.* 
Shell of moderate size, rather stout, with a regularly tapered, acute 
spire, consisting of about five sharply angulated whorls below the nu- 
cleus. Suture marked by a distinctly raised, rounded, undulating, 
spiral thread. Nucleus small, prominent, semi-transparent, glassy, com- 
posed of about two and a half turns, with a small, rather prominent 
apical whorl, which, with the second, is very smooth ; the third is crossed 
by delicate, curved, transverse riblets, which are rendered somewhat 
nodulous by the intersection of a single, faint, revolving, median thread ; 
the others have about nine broad, prominent, acute, straight, longitu- 
dinal ribs extending from suture to suture, and separated by deep, con- 
cave interspaces about equal in width to the ribs. The whole surface 
is covered with distinctly raised, rounded cinguli and microscopic 
threads, which are roughened by the intersection of the fine lines of 
growth, and, under the microscope, have the appearance of being cov- 
ered with minute grains of sand. The cingulus at the center, defining 
the shoulder of the whorls, is the most. conspicuous; above this there 
are about five finer ones, and below, on the whorls of the spire, two or 
three, the number increasing to ten or twelve on the body-whorl. The 
aperture is a little less than half+the Jength of the shell, narrow, ob- 
long, broadest at its posterior third, pinched up anteriorly into a 
straight, slightly elongated canal. Outer lip thin (broken); inner lip in- 
conspicuous. No operculum. 
Color in alcohol deep yellow, with white ribs and canal. 
Length of largest specimen, 6.5™™; breadth, 3™™; length of aper- 
ture, 3™™; its breadth, .5™™. 
One living specimen (No. 35,404) was taken at station 2,108; also, 
young dead specimens at stations 2,112 (No. 35,884), and at 2,114 (No. 
35,515). 
This species is closely allied to M. cerina, but differs in having a 
stouter form, more angularly shouldered whorls, and especially in havy- 
ing very prominent, straight ribs extending from suture to suture. 
> 
Mangilia melanitica Dall, var. oxia Bush. 
B. range, 14 to 15 fathoms.* 
Shell small, slender, fusiform, lustrous, transparent, glassy, with a 
tall, regularly tapered, acute spire; whorls eight, slightly convex, an- 
gulated, carinated, with the suture defined by a distinct, smooth, rounded 
thread ; nucleus large, acute, consisting of three and a half rapidly ta- 
pering coils, with a small, very prominent, decidedly upturned apical 
