158 



COPEPODS OF LAST CRUISE OF CARNEGIE 



Station 150 

 October 23, 1929; 16° 15' N, 137° 06' W; bottom depth, 4553 m; 69 species 



Depth of tow, m 

 Temperature, °C 

 Salinity, o/oo 

 \'olume of tow, cm' 



Acartia danae 



negligens 



Acrocalanus gibber 



gracilis 



monachus 



Aetideus armatus 



Calanus minor 



Calocalanus pavo 



Candacia bispinosa 



simplex 



Canthocalanus pauper . . . . 

 Centropages calaninus. . . . 

 Clausocalanus arcuicornis . 



furcatus 



Clytemnestra rostrata. . . . 



scutellata 



Copilia denticulata 



quadrata 



vitrea 



Corycaeus agilis 



crassiusculus 



limbatus 



ovalis 



pacificus 



robustus 



speciosus 



Eucalanus attenuatus. ... 

 Euchaeta acuta 



marina 



Euchirella brevis 



curticauda 



Farranula carinata 



gibbula 



rostrata 



Haloptilus longicornis. . . . 



Haloptilus spiniceps 



Heterorhabdus papilliger. ... 



spinifrons 



Labidocera detruncata 



Lubbockia aculeata 



squillimana 



Lucicutia clausii 



flavicornis 



Macrosetella gracilis 



oculata 



Mecynocera clausi 



Megacalanus longicornis. . . . 



Microcalanus pygmaeus 



Microsetella rosea 



Oithona plumifera 



siniilis 



spinirostris 



Oncaea curta 



minuta 



venusta 



Onchocalanus nudipes, n. sp. 

 Pachos punctatum 



tuberosum 



Paracalanus aculeatus 



parvus 



pygmaeus 



Pseudocalanus minutus 



Sapphirina auronitens 



metallina 



nigromaculata 



Scolecithrix danae 



Undinula caroli 



darwinii 



vulgaris 



The temperature was high at the surface and fell 6° in 

 the 100 meters; the salinity and hydrogen-ion concentration 

 changed but little. Eighteen species were captured at the 

 surface, 39 in the 50-meter tow, and 52 in the 100-meter tow. 

 Thirty-seven species (54 per cent) were each confined to a 



single depth and 7 were present at all three depths. Again 

 the three tows were of practicalh- the same length, but the 

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

 that of either of the others. Corycaeus, Farranula, and Oncaea 

 appeared in all tows; Oithona was absent from the surface. 



