16 
MARINE SHELLS OF WEST COAST OF NORTH AMERICA 
striations, and is as wide as the space between this cord and the median 
cord. In addition to the spiral sculpture, the whorls are marked by very 
many irregular decidedly curved and regularly distributed axial riblets, 
which render their intersections with the spiral cords very weakly nodu¬ 
lose. The summits of the whorls are roundly shouldered and make the 
sutures appear constricted. Periphery and base of the last whorl somewhat 
inflated, well-rounded, the latter marked by seven equal and equally spaced, 
low, rounded, spiral cords and feeble axial threads. The space immediately 
surrounding the umbilical area is free from all spiral sculpture. Aperture 
very broadly ovate; outer lip thin, showing the external sculpture within; 
columella slender, strongly curved and slightly revolute; parietal wall 
glazed with a thin callus. Length, 7.5 ; diameter, 2.7 mm. (Bartsch.) 
Type in United States National Museum, No. 195219. Type locality, 
San Pedro, California. 
Range. San Pedro to San Diego, California. 
Alabina occidentalis Hemphill, 1894 
Plate 95, fig. 2 
Zo'c, 4: 395. Proceedings of the United States National Museum, 39; PI. 62, fig. 2. 
Shell elongate-conic, subdiaphanous. Nuclear whorls \ l / 2t small, well 
rounded, smooth. Postnuclear whorls with a very strong, concavely sloping 
shoulder, which extends from the appressed summit over the posterior 
third of the whorls terminating there in a well-rounded keel. The shoulder 
is smooth, excepting fine lines of growth; the portion between the suture 
and the shoulder is well rounded, marked with lines of growth and 9 to 11 
equal and equally spaced incised spiral lines. Sutures strongly constricted; 
periphery of the last whorl well rounded. Base moderately long, somewhat 
inflated, well rounded, narrowly umbilicated, marked by slender lines of 
growth and numerous fine spiral striations. Aperture very broadly ovate; 
posterior angle obtuse; outer lip thin, columella slender, slightly oblique, 
revolute. (Bartsch.) 
Type. Specimen described and figured in United States National Mu¬ 
seum, No. 127551. Type locality, Mud Flats, near San Diego, California. 
Range. San Diego, California. 
Described as Eulimella occidentalis. 
Alabina turrita Carpenter, 1866 
Plate 95, fig. 4 
Proceedings of the California Academy of Sciences, 3:219. 
St. t. minuta, albida, solidiore, laevi, turrita; anfr. nucl. iii. subnati- 
coideis, apice mamillato; norm. v. planatis, angustis, suturis parum im- 
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