132 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 10 



Branchial filaments are absent from the first 100 to 150 segments; 

 thereafter some segments are abranchiate but most have a simple, cirri- 

 form branchia on either side, or they may be branched once or twice. 

 The unworn maxillary right plate II has a small accessory tooth distally, 

 as originally shown by Moore; the cirri of the first segment are propor- 

 tionately less prolonged (only about half as much) than in P. siciliensis 

 ( above ) . 



P. pallidus was originally separated from P. paloloides for having 

 some divided branchiae, but this now seems to be only a variation. P. 

 paloloides, in turn, is very closely allied to P. siciliensis (above), from 

 which it differs only in minute details. 



Distribution. — Southern California, intertidal to 90 fms. 



