112 
MARINE SHELLS OF WEST COAST OF NORTH AMERICA 
coloration within; columella slender, slightly curved and revolute; parietal 
wall covered by a thin callus. Length, 8.5; diameter, 2.5 mm. (Dali and 
Bartsch.) 
Type in United States National Museum, No. 29328. Type locality, 
San Diego, California. 
Range. Santa Barbara to San Diego, California. 
Turbonilla berryi Dali and Bartsch, 1907 
Plate 52, figs. 5, 5a 
Proceedings of the United States National Museum, 33:500; PI. 44, figs. 10, 10a. 
Shell slender, very regularly acutely conic, bright chestnut-brown, with 
two narrow spiral bands of a lighter shade; one, the narrower of the two, 
is at the periphery; the other has its posterior edge at about the middle of 
the exposed portion between the sutures. Nuclear turns 2J4, smooth, de¬ 
pressed, helicoid, not immersed, having their axis at a right angle to the 
axis of the later whorls, their sides projecting slightly beyond the outlines 
of the spire. Post-nuclear whorls very high between the sutures, slightly 
beveled at the summit and moderately constricted at the periphery, orna¬ 
mented by well-developed, acute, retractive axial ribs, of which there are 
about 20 upon the second, 24 upon the fifth, and 26 upon the penultimate 
turn. These ribs extend quite strongly to the summit, where they feebly 
crenulate the well-impressed sutures. Periphery and base of the last whorl 
well-rounded, marked by the continuations of the axial ribs, which gradu¬ 
ally disappear as they cross the base. Entire surface marked by numerous 
very fine, closely spaced, wavy, spiral striation. Aperture suboval, somewhat 
effuse anteriorly; posterior angle acute; columella oblique, very slightly 
twisted and weakly revolute at its outer extremity. Length, 8; diameter, 
2.2 mm. (Dali and Bartsch.) 
Type in United States National Museum, No. 196223. Type locality, 
Monterey Bay, California. 
Range. Monterey Bay to Catalina Island, California. 
Turbonilla lowei Dali and Bartsch, 1903 
Plate 52, figs. 11, 11a 
Memoirs of the California Academy of Sciences, 3: 278; PI. 1, figs. 5, 5a. 
Shell elongate-conic, uniformly light brown. Nuclear whorls two, small, 
depressed, helicoid, having their axis almost at right angles to that of the 
succeeding turns, in the first of which they are about one-fourth immersed. 
Early post-nuclear whorls increasing but little in diameter, rather high be¬ 
tween the sutures, ornamented by very slender, somewhat sinuous, almost 
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