this location (haul 9), surface salinities varied about 0.1°/oo , and 

 surface temperatures decreased by only 0.5°C. Nonetheless, there 

 is a possibility that the survey area had less plankton volume in 

 October than in September due to the autumnal decline. 



Also in contrast to the October hauls, haul 1 contained several 

 different species of copepods and amphipods as well as other different 

 groups such as lamellibranchs (clams) . Because of the varied nature 

 of haul 1, only recognizable amphipods and copepods, composing about 

 71 percent of the total plankters, were classified to genus or species. 



Haul 1 contained all but six of the 32 species of copepods obtained 

 on the survey. The 26 species are listed below. Six of the species 

 contained 88.2 percent of the total count of adult copepods. Immature 

 copepods were much more numerous, but no attempt was made to estimate 

 their numbers. Immature specimens of Corycaeus , sp., Oncaea sp., 

 and Oithona sp. far exceeded the count of adults. Genera and families 

 of known bioluminescence are marked with an asterisk; other genera 

 here listed also may be bioluminescent. 



Acartia sp. 

 Aegisthis 

 Candacia sp. 

 Calanus finmarchicus 

 Clausocalanus furcatus 

 Clausocalanus arcuicorn 

 Clymnestra sp. 

 * Corycaeus sp. 

 Euchaeta sp. 



Euchirella sp. 

 Gael-anus pileatus 

 Gaetanus pungens 

 Haloptilis acutifrons 



~] AAO i *Heterorhabdidae sp. 



isj Lophothrix sp . 

 Lucicutia sp. 

 ♦ Lucicutia flavicornis 



♦ Metridia iucens 6% 



♦ Microsetella sp. 

 Oithona sp. 

 Oncaea sp. 

 Pleuromamma sp. 7% 

 Rhincalanus cornutus 4.2% 

 Rhincalanus nausutus 5% 

 Scolecithrix sp. 

 Undeuchaeta major 



The following amphipods occurred in small numbers in haul 1: 



Acanthoscina acanthoides 

 Cyphocaris anonayx 

 Hyperia schizogeneics 

 Parathemisto pacifica 

 Paraphronima crassipes 

 Paraphromma gracilis 

 Hyperia n. sp. 



Paraphonima sp. 

 Phronimopsis spinifera 

 Prom no macropa 

 Scina crassipes 

 Vibilia armata 

 Vibilia (propinqua) sp. 



Haul 11, taken from a depth of 1100 meters, was the deepest haul 

 made. At least 22 species of copepods were present, of which the 

 following differed from those obtained in haul 1: 



Canadacia longimana 

 Euaugaptilus sp. 

 Eucalanus elongatus 



Scolecithrix danae 

 Scolecithricella dentata 

 Scottocalanus securifrons 



39 



