119 



SUMMARYo- The largest animal Is an echlurold; the most abundant or 

 conspicuous are an ophiuroid and various kinds of polychaetes. 

 The number of species is estimated at 45, that of individuals 

 about 200. 



V-2, Sta, 3163-55<, In 360 feet. OPG took only a very small 



sample of gray mudstone from the wall of the canyon, 



Echinoderm - fragment of an ophiuroid only 



Crustaceans Include an isopod, an ostracod, and 4 amphipods (2 caprelllds) 



Mollusks Include a small gastropod and a juvenile Yoldla 



A few hydroid stems 



Nemertean - 1 



Polychaetes J, largely single individuals, include: 



Anaitides , juvenile M aaelona , pouched 



Armandia Nereis procera 



Capitella T capitata Nothria, perhaps elegans 



another slender capltellid Onuphis 



Chone , perhaps mollis Prionospio , nr. malmgreni 



Lumbrineris Tharyx , perhaps parvus 



SUMMARY,- This small sample contains animal species resembling those 

 in shallow bottoms of Zone I (see above). 



V-3. Sta. 2192-52. In 366 feet. OPG took 1.51 cuft of fine mud 

 and sand. The screenings consisted largely of many kinds of animals, 

 especially annelids, smaller crustaceans, smaller mollusks, and 

 others . 



Mollusks (identified by Dr. Norman T. Mattox) include: 

 Gadulus fusiformis - 1 Solemya panamensis - 1 

 Dentalium rectius - 142 Tellina bodegensis - 1 

 Acteon punctocoelata - 1 Thyasira barbarensis - 3 

 Bittium catalinensis - 1 Yoldia scissurata - 13 

 Fusinus arnoldi - 2 

 Turbonilla sp. - 1 

 Volvulella tenusslma - 6 

 Polychaetes are very numerous and diversified, comprising no less than 

 40 species and many hundreds of individuals; Pectinaria , larger 

 terebelllds and o ther tubicolous kinds are particularly conspicuous. 

 SUMMARY. >= It is estimated that the sample has about 60 species and 

 950 or more individuals, 



V-4. Sta, 2727-54, In 398 feet, OPG took 1.76 cuft of green 

 sticky mud. The screenings consisted of many ophiuroids, annelids 

 and dead and living mollusk shells, 

 Echinoderms Include: 



Amphiacantha amphacantha - 25 

 Amphiodia ( Amphlspina ) digitata - 107 

 Amphioplus hexacanthus - 5 

 Amphioplus strongyloplax - 5 



holothuroids - a larger (90 mm long) and a smaller (35 ram long) 

 tailed kind, perhaps Molpadia 

 Crustaceans include various entomostracans , with: 

 phoxocephalid amphipods: 



Metaphoxus sp, A-19 Pontharpinia sp, E-13 



Heterophoxus sp. A-12 Pontharpinia sp. J-1 



Phoxocephalus sp. A-3 Pontharpinia sp, Y-2 



