Of the four species of amphipods collected in haul 11, only Scina 

 tulbergi is additional to the list from haul 1. 



Figure 33 presents a series of plankton distributions for the 

 October hauls. Because the September haul differed greatly from 

 the October hauls, haul 1 was not used in drawing the distribution 

 contours to avoid an unrealistic pattern. The plankton sample from 

 haul 14 was damaged and vras not analyzed. The first figure of the 

 series presents the volume of plankton (wet volume in milliliters) 

 collected at each station and the maximum depths sampled. 



Specimens of the Crustacea class were collected from all plankton 

 stations. Copepoda, ostracoda, and euphausiaceae were in greater 

 numbers than other Crustacea and at all stations. Copepoda and ostracoda 

 were most abundant in the eastern part of the survey area, whereas 

 euphausiaceae were more abundant in the northern and southern parts. 

 The distribution figures for cirripedia larvae, cladocera, amphipoda, 

 and decapoda larvae show that these Crustacea were not collected 

 at all stations. Cirripedia (barnacle) larvae were more abundant 

 over the San Nicolas Basin than in the shallow waters where they 

 might normally be expected to attach. Cladocera were most numerous 

 in the northeastern and southwestern parts of the survey area, and 

 amphipoda were most numerous in the eastern portion. Decapoda were 

 not collected from two of the easternmost stations. The greatest 

 abundance was north and southeast of San Nicolas Island. 



Small medusae (jellyfish) were unusually numerous with greatest 

 concentrations over the deeper parts of the San Nicolas and Santa 

 Cruz Basins. Siphonophora (colonial jellyfish) were more numerous 

 in the eastern part of the survey area. 



Bryozoan larvae were found to be most abundant at the easternmost 

 stations in the area. Foraminifera were also found most abundant 

 at the easternmost stations, but none were collected at the two northernmost 

 stations. 



Gastropod larvae were concentrated over the northern slope of 

 San Nicolas Island toward the Santa Cruz Basin and at the southeastern- 

 most station over the San Nicolas Basin. Counts decreased to zero 

 intermediately between these two points. Pteropoda were concentrated 

 on haul number 7, southeast of Santa Barbara Island, where no gastropod 

 larvae were collected. 



Larvaceae were most abundant at stations around the periphery 

 of the survey area. The greatest concentration of Thaliacea (salps) 

 was on haul number 4 over the Santa Cruz Basin. None were collected 

 on haul number 7 . 



Chaetognatha were found at all stations but were centered in 

 two areas of abundance, one over the center of the San Nicolas Basin 



40 



