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DENDRONOTIDAE 307
Ancula pacifica MacFarland Pacific Ancula
California.
% inch in length, very similar to our figure of A. cristata (pi. i5f).
Color translucent-yellow with 3 narrow, orange lines on the anterior half
of the back, and one down the center of the back half. Rhinophores with
9 yellowish leaves. 3 branchial plumes. 4 (not 6) finger-like processes on
each side of the plumes. 35 rows of teeth in the radula. Center with a small
quadrangular plate, flanked by one large and one small pleural tooth.
Genus Hopkinsia MacFarland 1905
Hopkinsia rosacea MacFarland Hopkins' Doris
Monterey to San Pedro, California.
Plate 16a
1 inch in length. Rhinophores long and tapering, the anterior side
smooth along the entire length. % of the posterior side bears about 20 pairs
of oblique plates. Branchial plumes 7 to 14, entirely narrow and naked.
I large pleural tooth on each side, flanked by a tiny, triangular pleural. Spiral
tgg ribbon rosy. Moderately common at all times of year under shelving
rock between tide marks.
Superfamily AEOLIDIACEA
Faviily DENDRONOTIDAE
Genus Dendronotus Alder and Hancock 1845
Body compressed; 2 tentacles laminated, with arborescent sheaths; nu-
merous branchiae ramose. Arrow-shaped central tooth with a denticulate
margin; about 9 elongate laterals on each side. About 40 rows of teeth.
Dendro7iotus frondosus Ascanius Frond Eolis
Arctic Seas to Rhode Island. Alaska to Vancouver Island.
Plate i5e
2 inches in length. Rhinophores with 5 or 6 large leaves, interspaced by
about 15 smaller ones. Other characters as shown in our figure and the
generic descriptions. D. arborescens Miiller is this species. Common from
shore to 60 fathoms.
Dendronotus giganteus O'Donoghue Giant Frond Eolis
Northwest United States.
5 to 8 inches in length. Similar to our figure of frondosus. 16 to 18