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306 AiJierican Seashells
Acanthodoris brunnea MacFarland Pacific Brown Doris
Monterey Harbor, California.
% inch in length, somewhat like our figure of A. pilosa (pi. 15b). Somewhat
broader at the anterior end. Brown tubercles on back rounder, fewer,
not as pointed. Back brown with flecks of black and with small spots of
lemon-yellow between the tubercles. Rhinophores deep blue-black, tipped
with yellowish white. Club with 20 to 28 obliquely slanting leaves. 7 bran-
chial plumes, wide-spreading, bipinnate. About 10 tubercles are included
within the rosette, 4 or 5 of them large and enclosing the anal papilla. An-
terior margin of back is yellow. 24 to 28 rows of radular teeth. No centrals.
First pleural large, with 14 to 19 denticles on the inner border. 6 to 7 other
smaller pleural teeth. Dredged 30 to 60 fathoms.
Genus Adalaria Bergh 1878
Adalaria proxhim Alder and Hancock Yellow False Doris
Arctic Seas to Eastport, Maine. Europe.
Plate 15!
V2 inch in length; deep yellow, white or yellow-orange. Back covered
with stout, subclavate, or elliptical bluntly pointed tubercles, set at a little
distance apart, and mixed with smaller ones. Calcareous spicules appear
through the skin, radiating from the tubercles. Rhinophores with 1 5 leaves
reaching almost to the base. Margin of sheath smooth. Branchial plumes 11.
40 rows of radular teeth. No central tooth. First pleural large, sickle-shaped,
other II small and plate-like. Uncommon (?) in New England.
Family OKENIIDAE
Genus Ancula Loven 1846
Ancula cristata Alder Atlantic Ancula
Arctic Seas to Massachusetts. Europe.
Plate i5f
Yz inch in length, of a transparent watery white, smooth. Rhinophores
with 8 to 10 leaves. 3 branchial plumes, tripinnate. Labial armature of rows
of imbricated hooks. Radula narrow, center naked, 25 to 27 rows of teeth;
inner pleural large, denticulate on the inner margin. Outer pleural tooth
small, smooth. A. sulpJmrea Stimpson is probably this species. On the north-
west coast of Florida there is a Polycera {hummi Abbott) which superficially
resembles this species in external features, but its radula indicates its true
relationships.