CLASS GASTROPODA 
29 
Acteocina smirna Dali, 1919 
Proceedings of the United States National Museum, 56:296. 
Shell minute, white, with yellowish periostracum, of about four whorls 
with a very minute subglobular hardly projecting glossy nucleus; summit 
of spire with the whorl but little raised, flattish but not excavated between 
the suture and the bluntly-rounded shoulder; shell in front of the shoulder 
subcylindric, with fine axial incremental lines; aperture narrow, outer lip 
thin, nearly straight, rounding in front into rather wide, slightly excavated 
pillar, which near the body carries a single strong plait; body with a thin 
coat of enamel, the umbilical region slightly impressed but imperforate. 
Length, 4; diameter, 2 mm. (Dali.) 
Type in United States National Museum, No. 271492. Type locality, 
San Diego, California. 
Range. San Diego, California, to San Salvador. 
This Tornatina infrequens Carpenter, not C. B. Adams. 
Acteocina inculta Gould, 1856 
Proceedings, Zoological Society of London, 203, 1856. Tryon and Pilsbry, Manual of 
Conchotogy, 15: PI. 59, fig. 15. 
T. t. minuta, eburnea, solidula, elongata-ovali, longitudinaliter minutis- 
sime striata; spira elevata, anfr. iv. tabulatis; apertura % longitudinis 
testae adaequante, antice dilatata; labro inflexo, postice rotundato; colu¬ 
mella arcuata, callosa, uniplicata. (Gould.) 
Pacific Railroad (Preliminary Report, 1855). 
Shell minute, solid, ivory-white, elongate-oval, minutely striated longi¬ 
tudinally; spire elevated, consisting of about four tabulated whorls. Aper¬ 
ture about seven-eighths the length of the shell, not attaining the end of 
the outer whorl, linear, constricted at the middle and somewhat dilated 
anteriorly, posterior angle rounded; pillar moderately arcuate, usually 
presenting a well-marked fold at the anterior fourth, and well-coated with 
enamel. Length, %; breadth, y r2 in. (Gould.) 
Type in United States National Museum. Type locality, San Diego, 
California. 
Range. Monterey, California, to Gulf of California. 
Acteocina infrequens C. B. Adams, 1852 
Panama Shells, 214. 
Shell cylindric, not compressed about the middle; white; smooth; apex 
papillary, very minute and prominent; spire moderately elevated, convex; 
whorls four and one-half, acutely shouldered, with a deeply channeled 
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