LISTS OF SPECIES BY STATIONS 



117 



Station 100 

 May 4, 1929; 8° 05' N, 178° 48' W; bottom depth, 5800 m; 50 species 



Depth of tow, m 

 Temperature, °C 

 Salinity, 0/00 

 Volume of tow, cm^ 



Acartia danae 



Acrocalanus gibber a 



gracihs a 



longicornis f 



moiiachus f 



Aetideus armatus 



Calocalanus pavo 3 



styliremis 



Candacia bispinosa 



curta 



norvegica 



simplex f 



truncata 



Canthocalanus pauper 



Centropages calaninus 2 



Clausocalanus arcuicornis 



Copilia denticulata 2 



Corycaeus crassiusculus a 



dubius 3 



longistylis 2 



pacificus 



speciosus c 



typicus 



Eucalanus attenuatus 3 



crassus 



Eucalanus elongatus 



Euchaeta marina 



Farranula carinata 



gibbula 



ro.strata 



Hctcrorhabdus papilliger. 



Lucicutia flavicornis 



Microcalanus pygmaeus. . 



Microsetella rosea 



Neocalanus gracilis 



robustior 



Oithona attenuata 



plumifera 



similis 



Oncaea curta 



minuta 



venusta 



Paracalanus parvus 



Pseudocalanus minutus. , 

 Rhincalanus cornutus. . . . 

 Sapphirina auronitens. . . 



metallina 



nigroniaculata 



Scolecithri.x danae 



UniHnula darwinii 



The temperature, salinity, and hydrogen-ion concentration 

 were practically identical at all three depths. The 50-meter 

 tow and the 100-meter tow were of the same length, each 20 

 per cent longer than the surface tow, but the volume of the 

 50-meter tow was SO per cent larger than that of the 100- 

 meter tow and two and a half times as large as that of the 

 surface tow. Twenty-five species were found at the surface. 



a in the 50-meter tow, and 35 in the 100-mcter tow. Twenty- 

 three species (46 per cent) were each confined to a single 

 depth and 15 were present at all three depths. Corycaeus, 

 Farranula, and Oncaea were well distributed at all three 

 depths, but Candacia and Oithona were more numerous in 

 the two deeper tows. Rhincalanus was confined to the two 

 upper tows; it is usually found only in the 100-meter tow. 



