Lottia pelta Rathke, 1833, Sitka, Alaska, United States.
PHYSICAL CHARACTERISTICS Shell of medium height with slightly anterior apex, sculptured with heavy radial ribs, fine riblets, and/or concentric growth lines. Shell color ranges from blue-black to light brown with or without white markings; white markings typically drawn out into radial rays and blotches; interior shell surface blue-white with brown stained interior muscle scar. Up to 2.3 in (60 mm) in length.
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