12 
MARINE SHELLS OF WEST COAST OF NORTH AMERICA 
Alabina calena Dali, 1919 
Proceedings of the United States National Museum, 56:345. 
Shell small, with a very pale olivaceous periostracum, acute, slender, 
with about eight rounded whorls, the apex eroded; suture distinct, deep, 
marked by a small thread against which it is laid; spiral sculpture of (on 
the spire three) flattish cords with subequal channeled interspaces, on the 
last whorl four, the third at the periphery largest; axial sculpture on the 
upper spire of obscure radials which undulate the cords but do not show 
in the interspaces, and later are obsolete; there are also very fine silky 
regular incremental lines; the base is discoid, slightly flattish, imperforate, 
the aperture ovate, simple, the outer lip thin sharp, the inner lip white 
glazed; the lippar short, thick, and attenuated, the lip beyond it produced, 
patulous. Height, 10; diameter, 4 mm. (Dali.) 
Type in United States National Museum, No. 271070. Type locality, 
U. S. Fish Commission Station 3195, off San Luis Obispo Bay in 252 
fathoms. 
Range. Known only from type locality. 
Alabina californica Dali and Bartsch, 1901 
Plate 95, fig. 7 
Nautilus , 15:58-59. Proceedings of the United States National Museum, 39: PI. 62, 
fig. 7. 
Shell elongate-conic, yellowish white. Nuclear whorls two and one- 
tenth, moderately rounded, smooth. Post-nuclear whorls strongly rounded, 
somewhat inflated, appressed at the summit, marked by broad, low, strong, 
protractive, axial ribs, of which 14 occur upon the first to third, 16 upon the 
fourth, and 18 upon the penultimate whorl. In addition to the axial ribs, 
the whorls are marked on the spire by three feebly impressed, spiral lines 
which pass over the ribs as well as the broad, intercostal spaces. The mid¬ 
dle one of these three lines is halfway between the sutures. The other two 
divide space anterior and posterior to it into equal halves. Sutures strongly 
constricted. Periphery and base of the last whorl well-rounded, smooth, ex¬ 
cepting faint lines of growth. Aperture broadly ovate; posterior angle 
acute; outer lip thin; columella short, moderately strong, strongly curved 
and slightly reflected over the reinforcing base. Length, 5.3; diameter, 
2.2 mm. (Dali and Bartsch.) 
Type in United States National Museum, No. 162548. Type locality, 
Deadman Island, San Pedro. 
Range. Known only from the type locality. 
Described as Bittium ( Elachista ) californicum. 
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