184 
MARINE SHELLS OF WEST COAST OF NORTH AMERICA 
brilliant mazarin blue when fresh, but which unfortunately fades after a 
few years in the cabinet. Fresh specimens have a very different aspect 
from the common shells carrying reddish spiral lines on a yellowish 
ground. (Dali.) 
Typical specimens in United States National Museum, No. 59808. 
Type locality, Monterey, California. 
Range. Neah Bay, Washington, to Monterey, California. 
Calliostoma costatum pictum Dali, 1919 
Proceedings of the United States National Museum, 56:359. 
These shells resemble the type except that on the periphery of the 
whorl, and sometimes on the whorl between the periphery and the preced¬ 
ing suture, the shell is adorned with alternating light and dark patches or 
clouds of color. (Dali.) 
Typical specimens in United States National Museum, No. 12612a. 
Type locality, Neah Bay, Washington. 
Range. Neah Bay, Washington, to Monterey, California. 
Calliostoma annulatum Martyn, 1784 
Plate 97, figs. 1, 3 
Universal Conchology, Table 1, PI. 32. Tryon and Pilsbry, Manual of Conchology, 
11:363; PI. 67, fig. 43. 
Shell elevated-conic, imperforate, rather thin; light yellow, dotted with 
brown on the spiral rows of grains, the periphery or lower edge of each 
whorl encircled by a zone of violet or magenta, the axis surrounded by a 
tract of the same. Surface with numerous granose lirae, about seven on 
the penultimate whorl, nine or ten on the base. Spire conical, apex acute, 
minute, reddish; sutures slightly impressed. Whorls about nine, slightly 
convex, the last angular at periphery, flattened beneath; aperture rhom- 
boidal, oblique, fluted within. (Tryon.) 
Type in? Type locality? 
Range. Forrester Island, Alaska, to Catalina Island, California. Fos¬ 
sil: Pleistocene, San Pedro to San Diego, California; Pliocene, San Diego 
well. 
Described as Trochus annulatus Martyn. 
Calliostoma canaliculatum Martyn, 1784 
Plate 97, figs. 4, 6 
Figures of Notidescript Shells, Tabic 1, PI. 32. Tryon and Pilsbry, Manual of Con¬ 
chology, 11:361. 
This is, perhaps, less variable than any other Californian species. The 
ribs have a slight tendency to become beaded, and always are more or less 
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