NO. Z 



HARTMAN : QUANTITATIVE SURVEY 



341 



Numbers of species and specimens totalled : 



polychaetes 21 species, 60 specimens 



echinoderms 4 20 



mollusks 8 39 



crustaceans 5^ 33 



Total : 38^species, 1 52 speciments 



6. Sta. 2733 (near no. 187). NE of Ship Rock, in 152 fms. OPG 

 took 1.13 cuft of sandy mud with many animals. In addition to those 

 named in the chart, the sample included a ceriantharian (2), an echiu- 

 roid (1), a nemertean (1), amphipods (several), and a gnathid isopod 

 (1). The largest animal was the echiuroid, the most abundant Aiiiphi- 

 odia digitata (48) and solenogasters (23). 



Numbers of species and specimens estimated : 



polychaetes 22 species, 40^ specimens 



echinoderms 7 77 



mollusks 6* 25* 



crustaceans 2"^ 2"^ 



Total : 



37*species, 144^ specimens 



7. Sta. 2302 (no. 187). Between Isthmus and Ship Rock, in 185 

 fms. OPG took 1.57 cuft of fine greenish mud with many animals. In 

 addition to those named in the chart, the sample contained a ceriantha- 

 rian (2), nemerteans (2"^), an echiuroid (2), numerous amphipods and 

 a few isopods. The largest individual was a brissopsid echinoid, and the 

 most abundant were ophiuroids. Total numbers were estimated at more 

 than 29 species and 69 specimens. 



8. Sta. 2301 (no. 189), in 335 fms. Campbell grab took 33?, cuft of 

 fine grayish green mud with foraminiferans. In addition to those named 

 in the chart, there were an anemone (2), an echiuroid (1), a sipunculid 

 (3), nemerteans (2^^) and an enteropneust (1). The largest animal was 

 an echinoid, and none was outstandingly abundant. Numbers were esti- 

 mated at 21 species and about 60 specimens. 



Rowlands Landing 



1. Sta. 2142 (no. 186), in 19 fms. OPG took 1.9 cuft of sand and 

 mud with many animals. In addition to those named in the chart, there 

 were several kinds of sponges, some large and spherical, a ceriantharian 

 (1), small sea whips (3), a burrowing anemone covered with coarse 

 sand (4), four kinds of nemerteans (7), sipunculids of more than one 



