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 



Plate 16a 



Monterey to San Pedro, California. 



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 



Plate i5e 



Arctic Seas to Rhode Island. Alaska to Vancouver Island. 



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 



