1. Abbott R.T. 1974American Seashells, 2nd Van Nostrand Reinhold New York 663
2. Beeman R.D. G.C. Williams 1980 Opisthobranchia and Pulmonata: The Sea Slugs and Allies 308 354 Morris R.H. D.P. Abbot E.C. Haderlie Intertidal Invertebrates of California Stanford University Press California 690
3. Behrens D.W. 1980Pacific Coast Nudibranchs. Sea Challengers, California112