77 



I W-12a„ Sta, 4334-56. In 179 feet. OPG took 0.06 cuft of 

 dark green to black glauconite sand, and silt. The screenings consist- 

 ed of about a half liter of animals and little debris. 

 Echinoderms include a few ophiuroids and a smaller holothurlan 

 Crustaceans include colonies of Scalpellum (barnacle), amphipods, 



cumaceans, isopods, in considerable niimbers 

 Mollusks include smaller gastropods, especially Gyljchna , Bittium , 



Agla ja , smaller pelecypods, and others 

 Glottidia a lbida - 2, the largest measures 12 mm long 

 Polychaetes include: 



Ancistrosyllis , ovigerous Not h ria ele gans 



Artacameila , Chloeia pin nata , many juveniles 



Lanice , in long tubes Pectin a ria c alifornie nsis 



Lumbrineris bicirrata Pho loi^ 



Mage I on a Tereb elli des - 2 with copepods 



Neph tys spp. Thalenessa 



and many other kinds of smaller polychaetes 

 SUMMARYo- The largest animal is Nephtys , the most abundant is 



Chloeia; the bulk of organic matter is composed mainly of 



smaller polychaetes. 



I W-12b, Sta. 4328-56. In 227 feet. OPG took 0.37 cuft of 

 coarse green sand, some black gravel and broken shells. The screen- 

 ings consisted of nearly 2 liters of animals and sand, together with 

 broken shells of mollusks such as Polynices , Cr epldula , pectens, also 

 Lac queus, Pro tula and other shelled animals. 

 Echinoderms include many smooth ophiuroids and about 8 smaller holo- 



thuroids . 

 Coelenterates J- Monobrachium on small bivalve shells 

 Scal pe llum (barnacle) on tubes of Phyllocha etopte rus prol if ica 

 Mollusks include many smaller shells of diversified kinds 

 Polychaetes include: 



A rtacameila Phylloc h aeto p terus 



Chloeia pinnata Sphaeordorum minutum 



Liom brineris spp. Sthen elane lla 



and many other kinds of smaller species. 

 SUMMARY,- The bulk of animal materials is less than half a liter; 



it consists largely of ophiuroids and annelids of various kinds, 



I W-12C. Sta. 4325-56. In 200 feet. OPG took 1.88 cuft of medixm 

 and coarse green glauconite sand. The screenings consisted of about 

 2 liters of coarse to fine sand and animals. 



Echinoderms include about 50 smaller ophiuroids and a holothuroid 

 Crustaceans include: 



Scalpellum in clusters, attached to ends of onuphid and Phy llo 

 chaetop terus tubes 



many amphipods, isopods, cumaceans, a large ostracod measuring 

 1.3 mm long, and a dark brown tortoise-shelled ostracod 

 Nemerteans Include 1 or more pale with light brown longitudinal streaks 



and several smaller ones 

 Monobrachium , 2 colonies on a small clam 

 Mollusks include: 



scaphopod- 1, measures 22 ram long ; Poly n ices , Telllna , Bittium , 



Thyasira , and Axionopsis 

 Polychaetes include: 



Chloeia pinnata - many juveniles 



Ceratoce p hala ameri oana 



Chone ? mollls - 1 larger measuring 52 mm without crown, and a smaller 



