Description: English: Norrisia norrisi feeding on the giant kelp Macrocystis pyrifera at Pumpernickel Reef on Santa Catalina Island, CA. Date: 15 June 1992. Source: Own work. Author: Lonhart.
Description: English: Empty shell of Norrisia norrisi taken at UCSC Long Marine Lab, and with the slipper shell Garnotia norrisiarum on it. Date: 1 June 1995. Source: Own work. Author: Lonhart.
