140 



COPEPODS OF LAST CRUISE OF CARNEGIE 



Station 128 

 July 25, 1929; 40° 37' N, 132° 23' W; bottom depth, 3806 111; 7 species 



Depth of tow, m 

 Temperature, °C 

 Salinity, 0/00 

 Volume of tow, cm' 



Depth of tow, m 50 



Density (aip) 24. 1 25.4 



Hydrogen-ion concentration (pH) 8.12 8.11 



Length of tow, miles 1.0 1.0 



Acrocalanus gracilis 



Clausocalanus arcuicornis. 

 Clytemnestra rostrata. . . . 

 Neocalanus gracilis 



Oithona similis f a 



Paracalanus parvus c 2 



Pseudocalanus minutus a 



The temperature was moderate at the surface and fell 

 nearly 5° at the 50-meter level; the salinity and hydrogen-ion 

 concentration scarcely changed. Five species were captured 

 at the surface and 5 in the 50-mcter tow. Four species (57 

 per cent) were each confined to one tow and 3 appeared in 



both tows. The length of the two tows was exactly the same, 

 but the volume of the 50-meter tow was twice that of the 

 surface tow. Clausocalanus and Pseudocalanus made up the 

 bulk of the surface tow and Oithona that of the 50-meter 

 tow. 



Station 130 

 September 4, 1929; 37° 05' N, 123° 43' W; bottom depth, 3188 m; 45 species 



Depth of tow, m 

 Temperature, °C 

 Salinity, 0/00 

 Volume of tow, cm' 



50 100 Depth of tow, m 50 100 



16.2 11.7 8.8 Density (ir,p) 24.4 25.6 26.6 



33.4 33.4 33.7 Hydrogen-ion cone. (pH) 8.34 8.26 8.06 



224 192 150 Length of tow, miles 0.7 0.9 0.9 



Acartia danae 



Acrocalanus gracilis 



monachus 



Calanus finmarchicus 



hyperboreus 



propinquus 



Clausocalanus arcuicornis. 

 Corycaeus anglicus 



catus 



crassiusculus 



flaccus 



limbatus 



pumilus 



speciosus 



typicus 



Eucalanus attenuatus 



elongatus 



Euchaeta marina 



Farranula carinata 



concinna. 



gibbula 



rostrata 



Gaidius tenuispinus 



Luricutia flavicornis. . . . 



longicornis 



Macrosetella gracilis. , . . 

 Metridia brevicauda. . . . 



lucens 



Microcalanus pygmaeus. 

 Microsetella norvegica. . 



rosea 



Oithona similis 



spinirostris 



Oithonina nana 



Oncaea conifera 



media 



niinuta 



vcnusta 



Paracalanus parvus 



pygmaeus 



Pseudocalanus minutus. 



Sapphirina angusta 



Spinocalanus abyssalis. . 



caudatus 



Undeuchaeta sp., juv.. . . 



2 

 1 

 Id" 



The temperature was moderate at the surface and fell 

 almost 50 per cent in the 100 meters; the salinity increased 

 a little and the hydrogen-ion concentration diminished. 

 Twelve species were taken at the surface, 15 in the SO-meter 

 tow, and ii in the 100-meter tow. Thirt>'-fi\e species (80 

 per cent) were each confined to a single tow and 5 were 

 present in all three tows. The two deeper tows were 30 per 



cent longer than the surface tow but the volume of the latter 

 was somewhat larger. Corycaeus, Farranula, and Oncaea re- 

 appear in goodly numbers, the two former well distributed 

 in all three tows, the latter strictly confined to the 100-meter 

 tow. The Undeuchaeta which was recorded in the deepest 

 tow was a juvenile male with its fifth legs only partially 

 developed. 



