[i6 



COPEPODS OF LAST CRUISE OF CARNEGIE 



Station 99 

 May 2, 1929; 4° 22' N, 176° 23' VV; bottom depth, 4951 m; 52 species 



Depth of tow, m 

 Temperature, °C 

 Sahnity, o/oo 

 \'olume of tow, cm' 



Acartia danae 



Acrocalanus gibber 



gracilis 



longicornis 



nionachus 



Calocalanus pavo 



plumulosus 



Candacia bispinosa 



norvegica 



truncata 



Canthocalanus pauper. . . . 

 Centropages calaninus. . . . 

 Clausocalanus arcuicornis . 

 Clytemnestra rostrata. ... 



scutellata 



Copilia quadrata 



Corycaeus anglicus 



crassiusculus 



limbatus 



pumilus 



speciosus 



Eucalanus attenuatus 



elongatus 



Euchaeta acuta 



marina 



Euchirella messinensis. . . 



Farranula carinata 



gibbula 



rostrata 



Labidocera detruncata. . 

 Lucicutia flavicornis. . . . 

 Macrosetella gracilis. . . . 

 Microcalanus pusillus. . . 



pygmaeus 



Microsetella rosea 



Neocalanus gracilis 



robustior 



Oithona atteauata 



pluniifera 



similis 



Oncaea media 



minuta 



venusta 



Paracalanus parvus 



Pontellina plumata 



Pseudocalanus minutus. 

 Sapphirina auronitens. . 



nigromaculata 



scarlata 



Scolecithri.v danae 



Undinula caroli 



darwinii 



The temperature, salinity, and hydrogen-ion concentration 

 changed very little at the three depths. Nineteen species 

 were found at the surface, 32 at the 50-meter depth, and 39 

 at the 100-meter depth. T\venty-fi\e species (47 per cent) 

 were each confined to a single depth and 10 were present at 

 ail three depths. Candacia, Corycaeus, Oithona, and Oncaea 

 were largely confined to the two lower depths, and Farranula 



was more abundant at the surface. Canthocalanus, Centro- 

 pages, Eucalanus, and Euchaeta were among those appearing 

 at all three depths; Sapphirina was found at the surface and 

 in the 100-meter tow, but was entirely absent from the 50- 

 meter tow. The 100-meter tow was 40 per cent longer than 

 each of the other two tows, but its volume was 66 per cent 

 larger. 



