172 
‘2528 Erato albescens 
Off the Santa Barbara Islands, California, in 30-41 fms. 
“Shell whitish, thin and polished, whorls 4; spire low and 
nearly covered with a thin glaze extending from near the aper- 
ture; shell bluntly pyriform with a wide mouth, smooth pillar, the 
outer lip thickened, obscurely marginate externally, with about 
9 obscure distant denticulations internally, pillar short, twisted, 
with a flaring edge and almost gyrate axis; the body with a thin 
wash of callus, but, in the type no sign of pustulation. Lon. of 
shell 15, of aperture 13.5, max. diam. 10 mm.’’—Dall, Nautilus 
18:124, 22:126., 
2529 Scissurella (Schizotrochus) Kelseyi 
Off San Diego, Cal. ‘‘Shell large for the genus, trochiform, 
white, with about 4 rounded whorls, sculptured with fine (for- 
wardly convex) arcuate threads or raised lines, which above the 
fasciole are spirally microscopically striate, and on the base, with 
somewhat regularly spaced and stronger spirals; fasciole narrow, 
slightly above periphery, bounded by 2 sharp, very thin, elevated 
keeels; the slit extends about 1-fifth of the circumference of the 
last whorl. Aperture nearly circular, interrupted for a short dis- 
tance by the body, the inner lip slightly reflected over a small 
umbilicus; operculum multispiral, pale yellow. Alt. of shell 6, 
of aperture 3, max. diam. 5.5 mm.’’—Dall, Nautilus 18:124. 
‘2530 Murex (Phyllonotus) santarosana 
‘‘Shell small for the subgenus, with about 6 whorls, each bear- 
ing from 5-7 strong, low, reflexed varices, with a prominent short, 
reflexed and inflexed grooved spine at the shoulder of the whorl; 
nuclear whorls 1%, smooth, minute; nepionic whorls 2%, with the 
whorls tabulate, 2 strong spiral cords at the shoulder, the varices 
thin, irregular lamine low and obscure; subsequent whorls, with 
5 (increasing in adult to 7) strong, anteriorly crispate, amber- 
brown varices, under which the whorls are tabulate, the inter- 
varical spaces whitish, nearly smooth or with very obscure re- 
volving lines or threads; base of whorls somewhat constricted 
with a short grooved spine on each varix where it crosses the 
concavity; aperture obovate, small, with the inner lip smooth, 
the outer one more or less denticulate on the edge, the enamel 
whitish; canal long, anteriorly attenuated, the margins adjacent 
‘but not adherent. Height of adult 45, max. diam. of aperture 
10.5 mm.’’—Dall, Nautilus 19:15. 
Type locality: _off Santa Rosa Island, Cal., also off Jan Pedro, 
and Catalina Island. 
2531 Alaba Oldroydi 
Type locality:—San Pedro, Cal., 10 fms. (Mrs. Oldroyd). 
‘Shell small, polished, pale rufescent brown, with 7 whorls, 
the protoconch smooth, swollen, globose, the following whorl 
smooth and rather inflated, the subsequent whorls sharply spirally 
grooved with wider interspaces, crossed especially the earlier 
ones with a few irregular, low, half obsolete wrinkles, the whorls 
are flattish and sometimes slightly constricted in front of the 
suture; the aperture patulous, recalling that of Rissoina, the base 
rounded with no umbilicus. Length 5.25, max. diam. 2, length 
of last whorl 2.5 mm.’’—Dall, Nautilus 19:15. 
2532 Raymond, William James: 
West American species of Pleurotoma, subgenus Genota. Nau- 
itilus 20:37. 
