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 laminae 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 4 5, max. diam. of aperture 

 10.5 mm."— Dall, Nautilus 19:15. 



Type locality: — off Santa Rosa Island, Cal., also off San Pedro, 

 and Catalina Island. 



2531 Alaba Oldroydi 



Type locality: — San Pedro, <^al., 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 flatfish 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- 

 tilus 20:37. 



