130 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 25 



These individuals have affinities with P. neglecta (Sars) (see Berkeley 

 and Berkeley, 1952a, p. 116) but consistently differ in having many 

 eyes on the branchial radioles. 



PROTODRILIDAE 



Genus Saccocirrus Bobretzky, 1872 



Type S. papillocercus Bobretzky, 1872 



Saccocirrus papillocercus Bobretzky, 1872 



Fauvel, 1927, p. 430, fig. 145. 



Collections. VELERO IV Stations 2741 (many); 6205 (350+ ), 

 both off southern California, in red sands, in less than 15 fms. 



Length of larger individuals is about 30 mm; width less than 0.8 

 mm; segments number 100 to 150. The anterior end has a pair of 

 prehensile palpi resembling those of some spionids. The anal end has 

 a pair of lateral anal lobes, each with 5 to 6 papillae. Parapodia are 

 greatly reduced ; in the female they are present from the second, and 

 in the male from segments 8 to 12, and continue on segments farther 

 back. Parapodia have simple setae in uniramous fascicles. Each seta is 

 straight, acicular and distally bifid. 



S. papillocercus in southern California is associated with a charac- 

 teristic fauna including a lancelet, Pisione remote (Southern), Lum- 

 brineris acuta (Verrill), Aricidea furcata Hartman, and others, in 

 sediments of red sand. It is more widely reported from cosmopolitan 

 areas (see Fauvel, 1927, p. 430). 



DINOPHILIDAE 



Genus Dinophilus O. Schmidt, 1848 



Type D. vorticoides Schmidt, 1848 



Dinophilus gyrociliatus O. Schmidt, 1857 



Marcus, 1948, pp. 7-11, figs. 17-28. 



Collections. Specimens are taken occasionally in culture tanks in which 

 water is supplied from intertidal areas of southern California. Adults 

 measure less than a mm long and are best characterized by the presence 

 of their 5 or 6 segmentally arranged narrow ciliated bands ; setae are 

 altogether absent. 



First named from the Mediterranean Sea, this has a cosmopolitan 

 distribution, in fine sands at intertidal levels. 



