COMPLETE HARTMAN: POLYCHAETES FROM CALIFORNIA 63 



and the middorsum is white or pale. Dorsal cirri are thin and foliaceous. 

 The fully everted proboscis is unique in having its basal half covered with 

 scale-like papillae in obliquely longitudinal rows, and its outer half with 

 large, conical papillae in dispersed arrangement. Its distal end is bounded 

 by 12 circlets of slenderer papillae, one row behind the other. The pros- 

 tomium is wider than long, has 2 pairs of frontal antennae and a pair of 

 large, subcircular dark eyes. A nuchal papilla was not seen. The first 

 segment has a longer cirriform dorsal cirrus and a shorter, broader 

 ventral one. 



These specimens resemble a species described from the Yellow Sea, 

 China, as Phyllodoce papulosa Uschakov and Wu (1959, p. 23) except 

 that the California specimens are much smaller, measure only about 10 

 instead of 120 mm long. In both, the proboscis has its basal half with 

 papillae in rows, and its distal half with dispersed papillae considerably 

 larger than those on the basal half. 



Family Hesionidae 



The genera and species of this family are more numerous than indi- 

 cated ; only 5 species in 4 genera are named ; some others known to be 

 present have not been sufficiently studied to be generically or specifically 

 assigned. This is partly due to the fact that specimens of this family are 

 often very small, measuring less than 20 mm long, fragment on fixation 

 and lose many of the diagnostic parts such as tentacular cirri, prostomial 

 appendages and dorsal cirri either when taken in the field, or in the 

 process of preservation. Colors in life, which are sometimes strikingly 

 beautiful, are fugitive and seldom retained long enough to be accurately 

 recorded. 



Key to Species 



1. Parapodia uniramous or apparently so 2 



1. Parapodia distinctly biramous (PI. 5, fig. 2) 4 



2. Second visible segment the first setigerous one; with 2 pairs of 

 tentacular cirri Orseis lagunae 



2. Third visible segment the first setigerous one; with 6 pairs of 

 tentacular cirri 3 



3. Larger, body more than 15 mm long; notopodial setae present as 

 a small fascicle emerging from the dorsal surface of the neuro- 

 podium Ophiodromus pugettensis 



