Opisthobranchs from Laguna Beach

The determinations are by Dr. F. M. MacFarland

TECTIBRANCHS

Pleurobranchæa californica MacF. Only one specimen has been obtained at Laguna Beach, from a depth of from 15 to 20 fathoms. The specimen was mottled dark above and about 5 inches long. Dr. MacFarland informs me that this species is quite common in Monterey Bay and ranges much larger, almost up to 10 inches in length.

Navanax inermis Cooper. Black, yellow lines, blue spots, yellow edges. About two inches in length. Another specimen possibly may be the same species, black with yellow spots. Apparently the same form occurs at Balboa.

Aglaja (Doridium) purpureum Berg.? Brown, dredged 10 to 15 f.

NUDIBRANCHS

Triopha sp. Large, brown. Holdfast.

Flabellina iodinea Cooper. Narrow blue body, red appendages. Swims by lateral movements of the body. This beautiful nudibranch was first found near Laguna by Miss M. Cate, not far from Dana's point in 1916. In Jan. 15, '18, Mrs. May found a number near Laguna Beach.

Dirona picta MacF. Light brown, long thick appendages. Holdfasts and tidepools common in 1915.

Aegires sp. Knobs. Brick red, body clear.

Chromodoris universitatis Cock. Blue, yellow spots.

Polycera atra MacF. Red-brown, black stripes, brown spots. July 10, 1915.

Facelina sp. Body clear, appendages dark.

Ancula pacifica MacF.? Clear white, two yellow lines in front, one behind. Front appendages and two lateral tipped with yellow.

Cadlina Sp.? Dark brown, flattened.

Aeolidia sp. White to pink, appendages brown.

W. A. H.