LISTS OF SPECIES BY STATIONS 



139 



Station 126 

 July 21, 1929; 48° 05' N, 142° 56' W; bottom depth, 4382 in; 13 species 



Depth of tow, m 

 Temperature, °C 

 Salinity, 0/00 

 \ olume of tow, cm^ 



Aetideus armatus. . . 

 Calanus cristatus. . . . 



finmarchicus. . . . 



hyperboreus. . . . 

 Eucalanus elongatus. 

 Lucicutia flavicornis. 

 Macrosetella gracilis. 



Microsetella rosea 



Oithona similis 



spinirostris 



Oncaea minuta 



Pseudocalanus minutus. . 

 Scolecithricella abyssalis . 



The surface temperature was again 1° higher than at the 

 preceding station, and fell nearly 5° in the 100 meters; the 

 salinity remained practically the same, and the hydrogen-ion 

 concentration diminished a little. Three species were taken 



at the surface, 2 in the 50-meter tow-, and 12 in the 100-meter 

 tow. Ten species (77 per cent) were each confined to a single 

 tow and only 1 appeared in all three tows. Oncaea appeared 

 again, but with Oithona was found only at 100 meters. 



Station 127 

 July 23, 1929; 44° 16' N, 137° 37' \V; bottom depth, 4026 m; 14 species 



Depth of tow, m 

 Temperature, °C 

 Salinity, 0/00 

 X'olume of tow, cm' 



Acrocalanus gracilis 



Calanus cristatus 



finmarchicus 



hyperboreus 



Clausocalanus arcuicornis. 

 Eucalanus attenuatus 



crassus 



Neocalanus gracilis 



tenuicornis 



Oithona similis 



spinirostris 



Oithonina nana 



Paracalanus parvus 



Pseudocalanus minutus. 



The surface temperature was somewhat higher and fell 

 about 5° in the 100 meters; the salinit\' was low and increased 

 a trifle, and the hydrogen-ion concentration diminished. Six 

 species were found at the surface, 6 in the 50-meter tow, and 

 10 in the 100-meter tow. Nine species (64 per cent) were 



each confined to a single tow and 3 were present in all three 

 tows. The volumes of the two deeper tows were the same 

 and each was twice that of the surface tow. There were many 

 development stages of Calanus finmarchicus with the adults 

 at the surface. 



