372 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 19 



Numbers of species and specimens were estimated at : 

 polychaetes 35 species, 302 specimens 



echinoderms 4 51 



mollusks 2^ few 



crustaceans 5 24 



others 1 1 



Total: 47* species, 378"^ specimens 



5. Sta. 3572, in 103 fms. OPG took 0.25 cuft of glauconitic white 

 sand with shelly rubble, siliceous sponge spicules and many small ani- 

 mals ; none was conspicuous or large. Most numerous and abundant were 

 polychaetes, chiefly onuphids, cirratulids and spionids. Most abundant 

 were Nothria stigrnatis (56), Amphiodia iirtica (43), Chloeia pinnata 

 (23) and Haploscoloplos elongatus (10). Polychaetes numbered 26 

 species ; none was unique to the area. Echinoderms were represented by 

 two ophiuroids (49), and mollusks by four or more species, each with 

 few specimens. Small crustaceans were represented by amphipods, iso- 

 pods, tanaids and cumaceans. 



Ribbon Rock 



1. Sta. 3580, in 40 fms. OPG took 1.26 cuft of grayish green, sandy 

 mud. Most conspicuous were a large Luidia foliolata, purple holothu- 

 rians, O phiothrix sptciilata and other ophiuroids. The sample contained 

 also a small sea pen, an anemone, polychaetes with about 35 species, mol- 

 lusks with Cadulus (28) ; and small pelecypods and gastropods; small 

 crustaceans were represented by many amphipods, cumaceans (26), an 

 isopod (1), a small cancroid crab (2), and a pinnotherid crab (2). 



2. Sta. 3579, in 48 fms. OPG took 1.76 cuft of grayish green, sandy 

 mud 'with shelly rubble and many animals. Largest was Cerebratidus 

 rubra, and most conspicuous were Amphipholis squamata (82), A?nph't- 

 oplus strongyloplax (7), Amphiacantha arnphacantha (4), Leptosynapta 

 albicans (16) and Pentamera pscudopopidifera (3). In addition to the 

 species named in the chart, crustaceans were present as amphipods, iso- 

 pods, cumaceans and tanaids, each with few individuals ; other animals 

 were small anemones (2) , and a large Cerebral ulus rubra. 



Numbers of species and specimens totalled : 



polychaetes 42 species, ca. 400 specimens 



echinoderms 5 112 



mollusks 8 18 



crustaceans 5* 1 0* 



others 4 21 



Total: 64* species, 561* specimens 



