240 
PACIFIC SCIENCE, Vol. XX, April 1966 
TABLE 1 
Incidence of Plankton as a Function of Depth at Ross Sea Stations 
ORGANISM 
0-100 m 
DEPTH 
100-200 m 
AND INCIDENCE 
200-300 m 
300-400 m 
Station Ed-L Kainan Bay entrance, 
ent throughout water column. 
78° 10'S, 161' 
d 56"W. 0200 January 21, 1956. Depth, 
732 m. Algae pres- 
Coscinodiscus borealis 
few 
none 
few 
none 
Coscinodiscus janishu 
few 
none 
none 
none 
Coscinodiscus sp. A 
many 
few 
common 
common 
Corethron criophilum 
many 
many 
common 
common 
Streptotheca thamenis 
few 
none 
none 
none 
Hemiaulis membraneous 
common 
none 
none 
none 
Eucampia valasistum 
few 
none 
none 
none 
Eucampia zoodiaius 
few 
none 
none 
none 
Fragilariopsis antarctica 
common 
common 
none 
none 
Thalassiosira sp. 
common 
none 
common 
none 
Nitzschia seriata 
few 
none 
none 
none 
Rhizosolenia aha 
common 
none 
none 
none 
Rkizosolenia calcai avis 
common 
none 
few 
none 
Peridinium depressum 
few 
none 
few 
none 
Copepods 
none 
common 
many 
few 
Nauplii 
none 
common 
many 
few 
Veligers 
none 
none 
few 
none 
Station Ed-2. 40 km north of Kainan Bay. 77°44'N, 
Algae present in upper layers. 
162° 12'W. 
1200 January 28, 
1956. Depth, 700 m. 
Coscinodiscus borealis 
few 
none 
none 
none 
Coscinodiscus janishu 
many 
none 
few 
none 
Coscinodiscus sp. A 
common 
none 
few 
none 
Corethron criophilum 
many 
none 
few 
none 
Streptotheca thamenis 
few 
none 
none 
none 
■ Hemiaulus memhranecus 
common 
none 
none 
none 
Eucampia zoodiaius 
few 
none 
none 
none 
Fragilariopsis antarctica 
common 
none 
none 
none 
Nitzschia seriata 
few 
none 
none 
none 
Rhizosolenia calcai avis 
many 
none 
none 
none 
Peridinium depressum 
few 
none 
none 
none 
Tintinnids 
few 
none 
none 
none 
Copepods 
none 
none 
many 
none 
Nauplii 
none 
none 
many 
none 
Veligers 
none 
none 
few 
none 
