39 



Onuphis nebulosa at I W-13, gravelly or sandy 



bottoms remote from the outfall 



Pectinaria calif orniensis varying distances from 



the outfall, associated with fine sand, 



Pherusa capulata gravelly bottoms remote from outfall 



Pherusa inf lata penetrating soft shaley rocks 



PholoM at I W-8; II-7; and III-5 



Pi si one nr remota at II -1; 36b in San Pedro area 



Prionospio pinnata at I W-?; I SW-6 



Rhynchospio arenincola 63a (San Pedro) 



Tharyx parvus at I W-2; I NW-7; I SW-6 



Echinoderms with: 



Amphiodia ( Amphi spina ) digitata at I W-10 



Amphiodia ( Amphispina ) urtica at I W-9 and 11; I SW-9 



Amphi pholis squamata at I W-10, 11, and 12; I SW-8 and 



9; I NW-8; III-ll 



Ophiothrix spiculata 42a (San Pedro) requiring current 



Astropecten calif ornicus in Limited-Enriched-Fauna 



near the outfall 



A checklist with keys to systematic entities of the 

 commoner species from a given geographic region would be 

 most valuable to permit the analyses and evaluation of 

 different populations„ In southern California this lack 

 is one of the greatest obstacles in ecological surveys, 

 for many large and important animals are either unknown 



