Found at Santa Barbara Island on rocks at low water, differing from the original specimens only in larger size and deeper color. The tentacles are club-shaped, the branchial 7-8 parted, bipinnate and from one opening.
Doris sanguinea Cooper, loc. cit. (Asteronotus.)
Four specimens found with the last, differ from the type only in having the black spots very small. The tentacles are acute, cylindro-conic, retractile into a cavity bordered by a toothed membrane. The branchiæ form an erect chimney-shaped expansion. I cannot discover the stellate valvular structure of the branchial opening, which characterises the genus Asteronotus, in these specimens.
Doris Sandiegensis Cooper, loc. cit.
Two found with the last agree exactly with specimens from San Diego. The tentacles are conical and acute. The branchial orifice does not present the peculiar characters of Actinocyclus. Although all these species differ to some extent, they have no characters to distinguish them generically from the typical Doris, unless anatomical or microscopical examination should reveal them, or the characters of that genus should be more closely limited.
Triopa Johnston, 1838.
T. catalinæ Cooper. State coll. species, 1002.
Form much elongated, narrow, dorsal surface flat, becoming spatulate posteriously. Head expanded laterally and flattened, wider than the body, ornamented with 14 ciliæ, equally distributed around its margin, so as to form nearly a circle. Tentacles long, conical, retractile. Three pairs of short ciliæ at equal distances apart between the tentacles and middle of the body, connected by the sharp edges of the dorsal surface. Branchial plume five parted, bipinnately divided, expanding to nearly twice the width of the body, situated a little behind the middle of the body. Two short ciliæ close together on the medium line, a little behind the branchiæ. Length 1.50, breadth 0.25 inch. Color yellowish, speckled with white, filaments vermilion red.
Four specimens found on sea weed among rocks at low water near north end of Catalina Island, June 16th.