24 
MARINE SHELLS OF WEST COAST OF NORTH AMERICA 
sharp; columella with a strong, tortuous fold. Operculum horny, elliptical, 
lamellar. 
Type. Tornatella fasciata Lamarck. 
Distribution. United States, Britain, Senegal, Red Sea, Philippines, 
Japan, Peru. Fossil: Triassic—Lias; Pleistocene—America, Europe, South 
India. 
Acteon traski Stearns, 1898 
Plate 1, fig. 12 
Proceedings of the United States National Museum, 21:297; text figure, p. 298. 
Shell small, conical above, cylindrical, rather solid, opaque, somewhat 
glossy; sculpture consisting of numerous, fine, spiral, impressed lines or 
grooves, which become wider toward the base of the body whorl, making 
the sculpture of the lower portion of the shell lirate; part of the lirae are 
slightly grooved and in some cases show a tendency to run in pairs; the 
grooved lines are not quite regular in their relative distances, and some 
are deeper than others; the surface is otherwise sculptured by sharp, 
close-set, incremental lines; these latter are subordinate to the spiral 
sculpture and are more conspicuous on the lower part of the body whorl. 
Color dull-cream white, with (in the example before me) two obscure, 
broad, pale rufous bands on the body whorl. Spire short, obtusely conical. 
Whorls six (probably apex in example somewhat eroded) ; suture distinct, 
narrowly channeled. Aperture about two-thirds the length of the shell 
(not quite 9 mm.), acutely angular above, rounded and effuse below, finely 
lirate and glossy within, with a thin glazing on the body whorl. Outer lip 
thin, simple. Columella short and flexuous, with a conspicuous fold, 
curving around the same and thickening the edge of the lip, which is 
moderately produced in the umbilical region. Length of shell, 11; length 
of body whorl, 9; breadth, 6 mm. (Stearns.) 
Type in United States National Museum, No. 148241. Type locality, 
San Diego, California. 
Range. San Diego, California, to Panama. Fossil: Pleistocene; de¬ 
scribed from a fossil. 
Subgenus Rictaxis Dali, 1871 
Acteon punctocoelata Carpenter, 1864 
Plate 1, figs. 17, 17a 
Supplementary Report, British Association for the Advancement of Science, 1:307. 
T. t. tenui, satis elongata, ovoidea; cinerea, fasciis duabus latis fuscis 
ornata; vertice nucleoso decliviter caelato; anfractibus normalibus 4 vix 
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