164 



COPEPODS OF LAST CRUISE OF CARNEGIE 



Station 156 

 November 4, 1929; 3° 01' N, 149° 46' W; bottom depth, 4953 m; 78 species 



Depth of tow, m 

 Temperature, °C 

 Sahnity, 0/00 

 Volume of tow, cm' 



50 100 Depth of tow, m 50 100 



27.6 27.0 26.3 Density (<r,p) 22.5 23.0 23.4 



35.0 35.0 35.0 Hydrogen-ion cone. (pH) 8.34 8.35 8.33 



48 32 128 Length of tow, m 1.6 1.5 1.7 



Acartia danae 



longiremis 



Acrocalanus gibber 



gracihs 



monachus 



Calocalanus pavo 



plumulosus 



styliremis 



Candacia bispinosa 



norvegica 



pachydactyla 



simplex 



Canthocalanus pauper. . . . 

 Centropages calaninus. . . . 



elongatus 



violaceus 



Clausocalanus arcuicornis. 



furcatus 



Clytemnestra rostrata . . . . 



scutellata 



Copilia denticulata 



quadrata 



vitrea 



Corycaeus agilis 



catus 



crassiusculus 



furcifer 



limbatus 



pumilus 



robustus. 



speciosus 



Dysgamus atlanticus 



Eucalanus attenuatus 



elongatus 



Euchaeta marina 



Euchirella brevis 



curticauda 



Farranula carinata 



curta 



Icf 



a 



a 



a 



c 



c 



a 



Farranula gibbula 



rostrata 



Heterorhabdus spinifrons 



Lucicutia clausii 



Havicornis 



Macrosetella gracilis 



Mecynocera clausi 



Megacalanus longicornis 



Microcalanus pygmaeus a 



Microsetella norvegica f 



rosea 



Miracia efiferata 



Neocalanus gracilis 



robustior 



tenuicornis 



Oithona plumifera 



setiger 



similis 



spinirostris 



Oithonina nana 



Oncaea curta 



media 



minuta 



notopa 



venusta 



Paracalanus aculeatus 



parvus 



Pontella cristata r 



Pontellina plumata r 



Pseudocalanus minutus 



Sapphirina auronitens r 



metallina 



nigromaculata r 



opalina 



Scolecithricella auropecten 



marginata f 



Scolecithrix danae 



Undinula caroli 



darwinii 



The temperature was high at the surface and fell 1° in 

 the 100 meters; the salinity and h)drogen-ion concentration 

 remained almost constant. Twenty-four species were taken 

 at the surface, 45 in the 50-meter tow, and 56 in the 100- 

 meter tow. Thirt>-nine species (50 per cent) were each con- 



fined to a single depth and 8 were present at all three depths. 

 Corycaeus, Farranula, Oithona, and Oncaea were found in each 

 tow, but Candacia onl>- in the 100-meter tow, which also con- 

 tained the only record for Dysgamus atlanticus, a parasitic 

 form tliat sometimes lea\es its host and swims about freelv. 



