154 



COPEPODS OF LAST CRUISE OF CARNEGIE 



Station 146 

 October 15, 1929; 31° 51' N, 140° 50' \V; bottom depth, 4756 m; 59 species 



Depth of tow, m 

 Temperature, °C 

 Salinity, o/oo 

 X'olume of tow, cni^ 







22.3 



34.8 



48 



SO 



22.3 



34.9 



32 



• 100 Depth of tow, m 50 100 



19.7 Density (fftp) 24.0 24.3 24.8 



34.3 Hydrogen-ion cone. (pH) 8.37 8.30 8.26 



48 Length of tow, miles 1.4 1.5 1.4 



Acartia danae 



negligens 



Acrocalanus gracilis 



longicornis 



Calanus minor 



Calocalanus pavo 



Candacia simplex 



Centropages calaninus . . . . 



elongatus 



violaceus 



Clausocalanus arcuicornis . 

 Clytemnestra rostrata. . . . 



scutellata 



Copilia quadrata 



Corycaeus crassiusculus. . . 



lautus 



longistylis 



ovalis 



pumilus 



speciosus 



typicus 



Eucalanus elongatus 



Euchaeta acuta 



marina 



Farranula carinata 



curta 



rostrata 



Haloptilus longicornis 



Labidocera acutifrons 



detruncata 



Labidocera nerii 



Lubbockia squillimana. . . . 

 Lucicutia clausii 



flavicornis 



Macrosetella gracilis 



Mecynocera clausi 



Megacalanus longicornis. . 

 Microcalanus pusillus 



pygmaeus 



Microsetella norvegica. . . . 



rosea 



Neocalanus gracilis 



robustior 



tenuicornis 



Oithona similis 



spinirostris 



Oncaea minuta 



venusta 



Paracalanus parvus 



pygmaeus 



Pseudocalanus minutus. . . 

 Sapphirina auronitens. . . . 



metallina 



nigromaculata 



opalina 



Scolecithricella marginata . 



Scolecithrix danae 



Undinula caroli 



darwinii 



The temperature was high at the surface and fell 2?6 in 

 the 100 meters; the salinity and hydrogen-ion concentration 

 each diminished a little. Eighteen species were taken at the 

 surface, 37 in the 50-meter tow, and 44 in the 100-nieter tow. 

 Twenty-eight species (47 per cent) were each confined to a 

 single tow and 9 were present at all three depths. Candacia, 



Corycaeus, Farrainda, and Oncaea were found in each of the 

 tows, but Oithona did not appear at the surface. The 50- 

 meter tow was one of 12 net hauls containing Scolecithricella 

 marginata; the others were made at stations 35-36 (6), 39, 44, 

 114, 152, 153, 156, 158, 159. Labidocera drtruncata was again 

 extremch' abundant at the surface. 



