CLASS GASTROPODA 
83 
Type in United States National Museum, No. 322301. Type locality, 
Dutch Harbor, Unalaska, Alaska. 
Range. Known only from type locality. 
Genus ACLIS Loven, 1846 1 
Shell minute, like Turritella; usually spirally striated; apex sinistral; 
aperture oval; outer lip prominent; axis slightly rimate. Operculate. 
(Loven.) 
Type. Aclis nitidissima Macgillivary — Truncatella montagui Lowe. 
Distribution. West coast of America; Europe. Fossil: Devonian— 
Europe, United States. 
Subgenus Graphis Jeffreys, 1869 
Aclis shepardiana Dali, 1919 
Proceedings of the United States National Museum, 56:342. 
Shell minute, slender, translucent yellowish, with about nine whorls, 
including the rather blunt smooth apical nucleus; suture constricted, dis¬ 
tinct, coils of the spire rather lax; axial sculpture of minute close-set plica¬ 
tions which start from the suture and become feeble on the base; these are 
crossed by minute close spiral striae most evident near the periphery, and 
under the lens showing an inconspicuous reticulation; base imperforate, 
rounded and somewhat produced; aperture ovate, the margin thin, not re¬ 
flected, interrupted by the body, produced anteriorly. Height of shell, 3.7; 
diameter, 1 mm. (Dali.) 
Type in United States National Museum, No. 107276. Type locality, 
San Pedro, California. 
Range. San Pedro to San Diego, California. 
Subgenus Aclis s.s. 
Aclis turrita Carpenter, 1864 
Supplementary Report, British Association for the Advancement of Science, 657. 
Proceedings of the California Academy of Sciences, 3:219, 1866. Proceedings of 
the United States National Museum, 39; PI. 62, fig. 4. 
St. t. minima, albida, solidiore, laevi, turrita; anfr. nucl. iii. subnati- 
coideis, apice mamillato; norm. v. plamatis, angustis, suturis parum im- 
pressis; basi subito rotundata, haud umbilicata; apertura subrotundata; 
labro postice parum contracto. Long., 0.06; long, spir., 0.04; lat., 0.02 
poll. (Carpenter.) 
Minute, slender base rounded. (Carpenter.) 
Type in United States National Museum, No. 15566. Type locality, 
San Pedro, California. 
Range. Known only from type locality. 
1 For description of new species received while this volume was in press, see 
Appendix, p. 281. 
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