54 



COPEPODS OF LAST CRUISE OF CARNEGIE 



Station 44 

 November 17, 1928; 3° 15' S, 99° 48' W; bottom depth, 3423 m; 89 species 



Depth of tow, m 

 Temperature, °C 

 Salinity, o/oo 

 Volume of tow, cm^ 



50 100 Depth of tow, m 



20.6 20.4 13.7 Density (.ru-J 



34.8 34.8 35.0 Hydrogen-ion cone. (pH) 



246 80 192 Length of tow, miles 



Acartia danae c 



longiremis 1 



negligens c 



Acrocalanus gracilis f 



Aetideus armatus 



Amallothri.x obtusifrons 



Calanus minor 



tonsus 



Calocalanus pavo 1 



styliremis 



Candacia armata 1 



carta 



simplex 



truncata 



Centropages calaninus 1 



Clausocalanus arcuicornis c 



furcatus c 



Copilia denticulata 



Corycaeus agilis f 



andrewsi f 



catus f 



crassiusculus 1 



flaccus 



minimus 1 



pacifiicus 



pumilus f 



speciosus 



typicus c 



Danodes plumata, n. gen. and n. sp. 4 9 

 Eucalanus attenuatus 



crassus 



elongatus 



monachus 



mucronatus 



Euchaeta acuta 



marina 



Farranula curta r 



gibbula r 



gracilis a 



rostrata a 



Gaidius tenuispinus 



Haloptilus acutifrons 



longicornis 



plumosus 



spiniceps 



2 

 r 

 c 



c 



2 



Icf 



1 



c 



f 



Id' 



f 



c 



r 



3 



Heterorhabdus papilliger. , 



spinifrons 



Heterostylites longicornis. 

 Labidocera detruncata. . . 



nerii 



Lubbockia squillimana. . . 



Lucicutia clausii 



Macrosetella gracilis 



oculata 



Mecynocera clausi 



Microcalanus pygmaeus. . 



Microsetella rosea 



Neocalanus gracilis 



robustior 



tenuicornis 



Oithona attenuata 



plumifera 



similis 



spinirostris 



Oncaea conifera 



curta 



media 



minuta 



notopa 



similis 



subtilis 



\enusta 



Paracalanus parvus 



Phaenna spinifera 



Pontella danae 



tcnuiremis 



Pontellina plumata 



Pontellopsis regalis 



Pseudocalanus minutus. . 



Sapphirina opalina 



Scolecithricella bradyi . . . 



marginata 



Scolecithrix danae 



Spinocalanus abyssalis. . . 



Temora stylifera 



Undinula caroli 



darwinii 



vulgaris 



N'ettoria granulosa 



The temperature dropped only 0?2 in the upper 50 meters, 

 but fell nearly 7° in the next 50 meters. The salinity and 

 hydrogen-ion concentration were fairly high and changed \ery 

 little. All three tows were of the same length, but the volume 

 of the surface tow was three times that of the 50-meter tow 

 and 1.3 times that of the 100-meter tow. Forty-nine species 

 (55 per cent) were each confined to a single depth and 13 were 

 present at all three depths. Thirty-nine species were found 

 at the surface, 53 in the 50-meter tow, and 50 in the 100- 



meter tow. Corycaeus and Oncaea were rich in species, which 

 were well distributed in all three tows. Eucalanus and Oithona 

 had 4 or S species each, and all but 2 Oithona species were 

 confined to the deeper tows. The 4 species of Haloptilus 

 appeared only in the 100-meter tow, together with Aetideus, 

 Heterorhabdus spinifrons, and Spinocalanus. The surface tow 

 contained Corycaeus minimus and Labidocera nerii, which 

 were found in only a few other localities. The 3 species of 

 Undinula were abundant; 2 occurred only in the 50-meter tow. 



