CLASS GASTROPODA 
117 
the last whorl well-rounded. Base moderately long, well-rounded. Entire 
surface of spire and base marked by numerous, very closely crowded, 
wavy, spiral striations. Aperture large; posterior angle acute; outer lip 
thin, showing the external sculpture and color bands within; columella 
very oblique, almost straight, and slightly revolute. Length, 11.7; diameter, 
3.5 mm. (Dali and Bartsch.) 
Type in United States National Museum, No. 173080. Type locality, 
Long Beach, California. 
Range. Long Beach to San Diego, California. 
Turbonilla halistrepta Dali and Bartsch, 1909 
Plate 50, fig. 2 
Bulletin 68, United States National Museum, 72; PI. 5, fig. 2. 
Shell elongate-conic, wax-yellow, with a broad subsutural narrow sub¬ 
median and a broad subperipheral band of golden brown. (Nuclear whorls 
decollated.) Post-nuclear whorls rather high between the sutures, very 
slightly shouldered, marked by almost obsolete, nearly vertical axial ribs, 
which are best developed near the summit and practically disappear before 
they reach the suture on the early whorls; on the last three they are scarcely 
indicated. Of these ribs there are about 28 upon the third and 24 upon the 
seventh whorl. Sutures well-impressed. Periphery and the short base of 
the last whorl somewhat inflated, well-rounded. Entire surface of spire 
and base marked by many well-incised, closely spaced, wavy, spiral stria¬ 
tions. Some of the fine lirations between the incised lines are a little darker 
colored than the rest of the surface and appear as reddish-brown hair lines. 
Aperture oval; posterior angle acute; outer lip thin, showing the external 
markings within; columella slender, strongly curved and moderately revo¬ 
lute. Length, 9.5; diameter, 2.7 mm. (Dali and Bartsch.) 
Type in United States National Museum, No. 205954. Type locality, 
ofif Newport, California. 
Range. Known only from type locality. 
Turbonilla lituyana Dali and Bartsch, 1909 
Plate 50, fig. 8 
Bulletin 68, United States National Museum, 72, PI. 5, fig. 8. 
Shell elongate-conic, light wax-yellow, with a supra and subperipheral 
light-chestnut band, separated by a very narrow, dark wax-yellow periph¬ 
eral zone. (Nuclear whorls decollated.) Post-nuclear whorls rather 
high between the sutures, early ones with moderately strong, broad, low, 
almost vertical, axial ribs, which become quite obsolete on the last turn and 
a half. About 22 of these ribs appear upon the eighth whorl. Intercostal 
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