LISTS OF SPECIES BY STATIONS 



121 



Station 104 

 May 13, 1929; 20° 12' N, 161° 19' E; bottom depth, 4741 m; 58 species 



Depth of tow, m 

 Temperature, °C 

 Salinity, o/oo 

 X'olume of tow, cm' 



Acartia danae f 



Acrocalanus gibber 



gracilis a 



Calocalanus pavo 2 



[)luniiil()sus 



Candacia bispinosa f 



norvegica 



simplex 



truncata f 



varicans 



Centropages calaninus f 



Clausocalanus arcuicornis f 



Copilia denticulata f 



quadrata 



Corycaciis catus 



crassiusculiis 



furcifer 



longistylis 



pumilus 



speciosus 



typicus 



Eucalanus attenuatus 



Euchacta marina 



Farranula carinata a 



gibbula f 



gracilis r 



rostrata a 



Haloptilus acutifrons 



longicornis 



Heterorhabdus papilliger 



Labidocera detruncata c 



Lucicutia clausii 



flavicornis 



Macrosetella gracilis 1 



Mecynocera clausi 



Megacalanus longicornis 



Microcalanus pusillus 



pygmaeus 2 



Microsetella norvegica 2 



rosea 



Neocalanus gracilis 



robustior 



Oithona attenuata 



similis 



spinirostris 



Oncaea media r 



minuta 



similis 



venusta f 



Paracalanus parvus f 



PIcuromamma gracilis 



Pontellina plumata 1 



Pseudocalanus minutus f 



Sapphirina angusta 1 



auronitens c 



nigromaculata 



Scolecithrix danae 



Undinula darwinii 



The temperature and hydrogen-ion concentration de- 

 creased slightly and the salinity increased a trifle in the 100 

 meters. Twenty-five species were taken at the surface, 35 in 

 the 50-meter tow, and 34 in the 100-meter tow, an exceptional 

 \ertical distribution. Thirty-two species (55 per cent) were 

 each confined to a single depth and 10 were found at all three 



depths. Candacia, Corycaeus, Farranula, and Oncaea were 

 found at all depths, but Oithona did not appear at the sur- 

 face. Haloptilus, Pleiiromamma. Heterorhabdus, and Lucicutia 

 were found only at 100 meters. The three tows were of prac- 

 tically the same length, but the volume of each of the two 

 upper tows was one-third larger than that of the 100-meter. 



