43 
486 Clathurella affinis Dall. 
San Miguel Island to Cape San Lucas. 
Cal. ac pr 5:62. 
487 Drillia torosa Carpenter. 
Monterey to San Diego. 
488 Variety Nitens Carpenter. 
Santa Rosa Island (Yates). 
489 Bivonia compacta Carpenter. 
Washington; San Pedro, Cal. 
490 Phasianella compta pulloides Carpenter. 
Synonym of Phasianella pulloides. 
491 Crepidula excavata Brod. 
Sitka; Mexico; Peru. 
492 OC. navicelloides nummaria Gould. 
Synonym of Crepidula Lessoni nummaria. 
493 OC. navicelloides explanata Gould. 
Synonym of Crepidula Lessoni explanata. 
—_——_—_—_——_0——___—— 
494 Dall, William Healey: 
On some new or interesting West American shells obtained 
from the dredgings of the U. S. fish commission steamer Albatross 
in 1888, and from other sources. U. S. nat. mus. pr 14:173-191 
t 5-7. 
Contains notes or descriptions of the following forms, num- 
bered 495-532. 
495 Eupleura muriciformis Broderip. 
Synonymy quoted:—Ranella muriciformis Broderip; R. pli- 
cata and triquetre Reeve. 
Cerros Island; San Diego; Venezuelan coast of the Pacific. 
496 Variety? Unispinosa Dall. Mazatlan. 
497 Variety Limata Dall. Gulf of Cal. 
498 kEupleura caudata Sav. 
Cape Cod to the Florida keys. 
499 Variety sulcidentata Dall. Florida. 
500 Nassa californiana 
‘“‘Generally ventricose; cancellate; slightly tabulate on the 
upper portion of the whorls near the suture; where the revolving 
ribs cross the longitudinal ribs there occurs a considerable nodule; 
body whorl with about ten prominent revokving ribs and with 
about three less conspicuous at the base; the basal channel ceases 
just before reaching the columella; columella smooth without 
teeth or tubercles; outer lip strongly sinuate with the extreme 
edge crenate. Whorls of the spire about five. Ground color 
white; revolving ribs purplish brown; epidermis yellowish white; 
varieties occur with omission of color in some of the revolving 
ribs which gives a faint pattern of banding. Length 30 mm; 
width 11 mm; spire 10 mm.’’—J. J. Rivers, Zoe 2:70-82, f. 
