115 



Echlnoderras include: 



Amphlpholls squamata - 1 



4stropecten callfornlcus - 1 juv. 



Ophlocynodus cor:/netes - 1 

 Mollusks includes 



chaetoderm - 4 



gastropod, perhaps Mitrella permodesta - 6 

 Echluroid - a large proboscis only 

 Polychaetes include: 



ampharetids - many clrratulids - several 



Ancistrosyllis - 1 or more f labelligerid - 1 



Aricidea - 1 maldanids - several 



Tinknown orbinlid - 1 unknown Polydora - 1 



capitellid - 1 Terebellides 



?Chone - 1 and others 



SUMMARYo- This is representative of deeper water and resembles that of 



about the same depth and sediment of San Pedro Basin, above the 



sill depth. 



SUMMARY OF ZONE III-l to 16,- The fauna of the northern end of Santa 

 Monica Bay is characterized by animal species existing in sandy or 

 muddy bottoms. In shallower parts (to 150 fathoms) there are many 

 smaller J, smooth ophiuroids, diversified shallow-water polychaetes, 

 and smaller crustaceans. Deeper parts, represented by samples 14 

 to 16 J, are characterized by the presence of burrowing echinoids, 

 echiuroids, and different kinds of polychaetes. 



IV-lo Stao 2997-55. In 600 feet. OPG took 1.89 cuft of fine 



dark green clayey mud. The screenings consisted of many animals of 



smaller sizes, 



Echlnoderms include: 



Amphiacantha amphacantha - 4 Amphipholis pugetana - 1 



Amphiodia digitata - 25 Amphipholis squamata - 5 



Amphlodia urtica - 1 Amphioplus strongyloplax - 4 



Amphiodia psara - 5 large Ophiura lutkeni - 2 



Amphiodia rugosa - 12 Brisaster townsendi - 2 



Crustaceans include various entomostracans, with phoxocephalld amphipods: 

 Harpinia sp. A-7 Phoxocephalus sp. A-5 



Heterophoxus sp. A-4 Pontharpinia sp. E-1 



Metaphoxus sp. A-9 



Polychaetes include many diversified kinds, especially species in 

 Chloeia c Pectinaria , maldanids, and others. See also the next 

 sample. 



IV-2o Sta, 3181-55, In 648 feet. OPG took 2,2 cuft of gray green 

 silty mud. The screenings contained many animals of different kinds 

 but rather few foraminiferan tests. 

 Echlnoderms include: 



Amphiacantha amphacantha - 6 Amphiodia urtica - 16 



Amphioplus strongyloplax - 4 Amphipholis squamata - 1 



