74 



COPEPODS OF LAST CRUISE OF CARNEGIE 



Station 61 

 December 28, 1928; 38° 29' S, 94° 14' \V; bottom depth, 3299 m; 26 species 



Depth of tow, 111 

 Temperature, °C 

 Salinity, o/oo 

 \olume of tow, cm' 



Calocalanus pavo 



plumulosus 



stylireniis 



Clausocalanus arcuicornis. 

 Eucalanus mucronatus. . . . 



Euchirella brevis 



Farranula curta 



gibbula 



rostrata 



Heterorhabdus papilliger. . 

 Heterostylites longicornis. 



Mecynocera clausi 



Microcalanus pygmaeus. . . 



Neocalanus gracilis. . . . 



tenuicornis 



Oithona brevicornis. . . 



similis 



spinirostris 



Oithonina nana 



Oncaea curvata 



similis 



Paracalanus parvus. . . . 

 Pseudocalanus minutus 



Scolecithrix danae 



Undinula darwinii 



X'ettoria granulosa . . . . 



The temperature was still low at the surface and dropped 

 6° in 100 meters; the salinitj- and hydrogen-ion concentration 

 were moderate and constant. Four species were found at the 

 surface, 13 in the 50-meter tow, and 19 in the 100-meter tow . 

 Seventeen species (65 per cent) were each confined to a single 

 tow and only 1 was present in all three tows. The length of 

 the surface tow was four-tenths greater than that of the other 



two tows, but its \olume was nine times as large. Since it 

 contained but 4 copepod species, 1 of which was represented 

 b>- a single specimen, its bulk was manifestly due to plankton 

 other than the copepods. The 50-meter tow contained 13 

 species, but more than 90 per cent of its copepods were 

 Mecynocera clausi. .Similarly, development stages of the 3 

 species of Oithona made up a large part of the 100-meter tow. 



Between stations 61 and 62 



A. December 28, 1928, W^ 50" p.m. to 2'' a.m.; 37° 35' S, 93° 35' \V 



B. December 29. 1928, 2^ to 2'' 45- a.m. ; 37° 34' S. 93° 35' W 



36 species 



Location of tow 

 \olume of tow, cm' 



.A 



36 



B 



32 



Location of tow 



Length of tow, miles 



.A 



0.4 



B 



7 1 



Acartia danae 



Acrocalanus gracilis 



Calocalanus plumulosus. . . 



Candacia simplex 



Clausocalanus arcuicornis. 



furcatus 



Corycaeus agilis 



catus 



crassiusculus 



pumilus 



Farranula rostrata 



Microcalanus pusillus 



pygmaeus 



Microsetella rosea 



Neocalanus gracilis 



robustior 



Oithona similis 



Oncaea media 



Oncaea mediterranea f 



niinuta c 



notopa r 



similis c 



venusta a 



Paracalanus parvus f 



pygmaeus 1 



Pleuromamma gracilis c 



Pontella atlantica 1 



Pseudocalanus minutus c 



Sapphirina angusta 1 



auronitens 



Scolecithricella bradyi 3 



niarginata 1 



Scolecithrix danae f 



Spinocalanus abyssalis c 



Undinula darwinii f 



Vcttoria granulosa 3 



