Nudibranch. 23. Ancula pacifica MacFarland - Dorso-lateral view. 23 painted by Anna B. Nash of the Hopkins Seaside Laboratory. In: "Opisthobranchiate Mollusca from Monterey Bay ....", Bulletin of the Bureau of Fisheries, Volume 25, 1905. P. 151, Plate XXX.
Image ID: libr0436, Treasures of the NOAA Library Collection
