Flabellina Cuvier, 1830.
F. opalescens Cooper.
Syn. Æolis, (Flabellina?) opalescens, Cooper—Proc. Cal. Acad. II, 1862, p. 205.
This species, dredged from the same locality as the last, presented exactly the same characters as the original specimens from San Diego. I also found a few of them on the rocky shore of Santa Barbara Island, differing only in having the branchial olive, tipped with white.
Phidania Gray, 1850.
P. iodinea, Cooper—Syn. Æolis (Phidania?), iodinea, Cooper, loc. cit. sup.
I found one of this species on the beach at Santa Barbara, agreeing exactly with those from San Diego.
Chioræra Gould, 1855.
C. leonina (?) Gould—Molluscs and Shells, U. S. Expl. Exped.
Wholly translucent, pale yellow, the variations marked only by a darker shade. Form of head nearly conical, the apex anterior, forming an angular roof above the oral opening. Bronchial processes five on each side, larger than represented in Gould’s figure, imbricated and decumbent. Length 2.75, height 1 inch. Otherwise as in the description and figure of Gould’s specimen.
A single specimen dredged in 20 fathoms off Santa Barbara, May 15th, differs in the points above mentioned from the northern animal, but being much smaller, the differences may arise from immaturity, and I have therefore preferred to retain the same name for it.