101 
1461 Turris (Surcula) halcyonis Dall. 
Shell small, slender, very acute, of a livid purple covered with 
an olivaceous periostracum, with about 11 whorls; nucleus more 
or less eroded, but apparently smooth, acute, and including about 
2% whorls; subsequent whorls rather flat, compressed and ap- 
pressed at and in front of suture, with a rounded base and in- 
conspicuous anal fasciole; sculpture chiefly of flattish spiral 
threads, one at suture, 3 smaller ones in front of it, followed by 
a flat broader one representing the fasciole, then (on the last 
whorl 8) more prominent threads, undulate or segmented by in- 
cremental lines and with wider interspaces (sometimes contain- 
ing an intercalary smaller thread) to base, followed by 6 or 7 
unsegmented threads to the siphonal fasciole, which bears 6 or 
7 smaller threads; the succession of undulations or slightly swol- 
len segments gives a slightly cancellate effect to the part of whorl 
which bears them, but there are no axial ribs, the effect of being 
produced rather by depressions between the rather coarse incre- 
mental lines; aperture narrow, acute behind, the anal sulcus nar- 
row and distinct but not very deep, the outer lip in front of it 
arcuately produced, the canal contracted, short, and recurved; 
inner lip polished and superficially erased; pillar twisted, with a 
thin layer of callus; operculum present as in T. ophioderma, 
Height of shell 23, of last whorl 12.5, of aperture and canal 8, 
max. diam. 7 mm. 
Type locality:—off Coronado Beach, San Diego, Cal,, in 10 
fms. (F. W. Kelsey). 
Also found at San Pedro by various collectors, 
1462 Acanthina lapilloides aurantia Dall. 
pcibea locality:—-on rocks at San Pedro, Cal. (Dr. R. H. Trem- 
fer). 
An orange-yellow color variety, slightly smaller than the typ- 
ical form, with the interspaces of the spiral threads prettily lam- 
ellose axially and more or less articulated with blackish brown 
small spots. 
1463 Tritonofusus (Plicifusus) Kelseyi Dall. 
Shell elongate, slender, acute, the spire much larger than the 
aperture; white, covered by an olivaceous periostracum; having 
10 whorls exclusive of the (eroded) nucleus of about 2 whorls; 
suture appressed and the whorls slightly constricted in front of 
it; axial sculpture of (on 7th whorl about 12) concavely arcuate, 
slightly protractive, low narrow ribs, crossing the whorls, on the 
later whorls becoming obsolete and finally absent from the last 
whorl altogether; interspaces wider than ribs; these are crossed 
by fine sharp spiral strie, somewhat irregularly spaced, of which 
there are about 12 on the 7th whorl, a narrow space before the 
suture being less sharply or not at all striate; aperture narrow, 
outer lip arcuate, somewhat excavated near suture and produced 
anteriorly. slightly thickened, simple, and internally smooth; 
inner lip smooth, with sculpture erased, passing gradually into the 
long straight pillar, which is attenuated in front; canal long, nar- 
row, straight; length of shell 34, of last whorl 18.5, of aperture 
14.5, max. diam. 8 mm. 
Type locality:—off San Diego, Cal., in 124-359 fms. 
Named in honor of F. W. Kelsey, who dredged it off San Diego 
in 50 fms. Found in the Pleistocene at San Pedro, Cal. (Esh- 
naur). 
°1464 Boreotrophon Bentleyi Dall. 
Shell small, slender, acute, ashy white, with about 7 whorls; 
