304 Ainerican Seashelh 



length of the entire rhinophore. It is completely retractile. 5 branchial 

 plumes are tripinnate. No mandibles or radula. One of the commonest Pa- 

 cific Coast species. In tide pools at all times of the year, especially common 

 in summer. Coiled t^^ band is yellow. 



Family POLYCERIDAE 

 Body limaciform (slug-like); branchial plumes not retractile. 



Genus Laila MacFarland 1905 

 Laila cockerelli MacFarland Laila Doris 



Plate i6j 

 Monterey to San Diego, CaHfornia. 



% inch in length. Rhinophores with 1 3 leaves in the clavus. 5 branchial 

 plumes tripinnate, non-retractile into the cavity. 76 to 82 rows of radula; 

 center with a series of rectangular, flattened plates; on the side are 2 pleural 

 teeth, then 10 to 13 closely set pavement-like uncinal teeth. Glans penis 

 long, armed with 10 to 12 irregular rows of minute, thorn-like hooks. Not 

 very common. Found under shelving rocks in tide pools. 



Genus Triopha Bergh 1880 

 Triopba carpenteri Stearns Carpenter's Doris 



Plate 1 6k 



Monterey to Point Lobos, California. 



I inch in length. Rhinophores with 20 to 30 leaves in the club. 5 

 branchial plumes, large, tripinnate. 30 to 33 rows of radulae, with 4 teeth on 

 the center part (the rhachis); pleural teeth 9 to 18, strongly hooked. Un- 

 cinal teeth 9 to 18, quadrangular in outline. Very common in rock pools. 



Triopha maculata MacFarland Maculated Doris 



Plate i6f 



Monterey to Point Lobos, Cahfornia. 



I inch in length. Rhinophore stalk and club same length, the latter with 

 18 leaves. Branchial plumes 5, tripinnate 14 rows of teeth, each row with 

 4 flattened plates, 4 to 5 pleurals, and 7 to 8 uncinal teeth. Blunt glans penis 

 armed with minute hooks. Abundant in summer in rock pools, in winter un- 

 common. 



Triopha grandis MacFarland MacFarland's Grand Doris 



Plate 1 6b 



California. 



