CLASS GASTROPODA 
99 
Turbonilla encella Bartsch, 1912 
Proceedings of the United States National Museum, 42 :265; PI. 35, figs. 1, 1 a. 
Shell small, elongate-conic, bluish-white. Nuclear whorls decollated. 
Post-nuclear whorls well-rounded, slightly shouldered at the summit, 
crossed by broad low, decidedly protractive, axial ribs, which become 
slightly flattened at the summit. Of these ribs, fourteen occur upon the 
second of the remaining turns, sixteen upon the third to seventh, and 
twenty upon the penultimate turn. Intercostal spaces a little wider than 
the ribs, the impressed portion terminating at a little distance posterior 
to the suture, leaving a narrow, plain band just above this. Suture well- 
marked. Periphery of the last whorl and the moderately long base well- 
rounded, the latter marked by the feeble continuations of the axial ribs, 
which extend to the umbilical area. Entire surface of spire and base 
marked by numerous, strong, rather coarse, wavy, spiral striations, which 
on the spire extend equally strong over the ribs and intercostal spaces. 
Aperture subquadrate; posterior angle obtuse; outer lip (fractured) thin; 
inner lip moderately strong, somewhat curved, and reflected. Length, 4.5; 
diameter, 1.2 mm. (Bartsch.) 
Type in United States National Museum, No. 211547. Type locality, 
San Pedro, California. 
Range. Known only from type locality. 
Turbonilla torquata Gould, 1852 
Boston Journal of Natural History , 6:384; PI. 14, fig. 10. 
T. solida, turrita, lactea; anfrac. 8 convexiusculis, plicis longitudinali- 
bus, flexuosis, perobliquis ad 16 ornatis; anfractu ultimo subangulato, 
basi inornata; apertura subovata, labro incrassato. (Gould.) 
Shell minute, turreted, solid milk-white, composed of eight moderately 
convex whorls, separated by a deep suture, each one with about sixteen 
very oblique, somewhat flexuose folds, quite well-marked, not quite reach¬ 
ing the suture; the spaces between do not exhibit revolving lines. The 
last whorl is slightly angular at periphery, at which point the folds ter¬ 
minate, and the base is quite destitute of sculpture. Aperture subovate, 
lip thick; columella somewhat revolute, joining the lip below at nearly 
a right angle. Length, 1/5; breadth, 1/20 in. (Gould.) 
Type in ? Type locality, Santa Barbara, California. 
Range. Point Fermin to San Diego, California. 
Described as Chimnitzia torquata. 
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