LISTS OF SPECIES BY STATIONS 



41 



Station 34 

 October 9, 1928; 11° 18' N, 78° 34' \V; bottom depth, 3536 m; 48 species 



Depth of tow, m 

 Temperature, °C 

 Salinity, 0/00 





 28.5 

 35.8 



Acartia clausii 



Aetideus armatus 



Calanus hclgolandicus. . . . 



minor 



Calocalanus pavo 



Candacia bispinosa 



norvegica 



Clausocalanus arcuicornis. 

 Clytemnestra scutellata. . . 



Copilia denticulata 



Corycaeus agilis 



crassiusculus 



speciosus 



Eucalanus elongatus 



Euchaeta marina 



Farraniila carinata 



gibbula 



rostrata 



Haloptilus ornatus 



Lubbockia squillimana. . . . 



Lucicutia flavicornis 



Macrosetella gracilis 



oculata 



Mecvnocera clausi 



Megacalanus longicornis . . r 



Microsetella norvegica c f 



rosea . . r 



Oithona plumifera c c 



similis . . c 



spinirostris . . r 



Oithonina nana . . r 



Oncaea minuta r r 



tenella r 



venusta a c 



Paracalanus parvus . . r 



Phaenna spinifera . . c 



Pontella securifer r 



Pontellina plumata . . r 



Pseudocalanus minutus f f 



Rhincalanus cornutus . . c 



nasutus . . c 



Sapphirina angusta 



scarlata . . r 



Scolecithrix danae . . c 



Spinocalanus abyssalis 



Temora longicornis r r 



stylifera c r 



Undinula vulgaris . . c 



The temperature, high at the surface, dropped 4° at SO 

 meters and 4° more at 100 meters; the salinity increased and 

 the hydrogen-ion concentration diminished downward, each 

 by small amounts. Si.xteen species were found at the surface, 

 40 at SO meters, and 35 at 100 meters. Eleven species were 

 found at all three depths, and 16 (33 per cent) were each 



present in but one tow. Tlie surface tow contained the only 

 Atlantic record of Pontella securifer and the SO-meter tow the 

 only Atlantic record of Sapphirina scarlata. .\ll the species of 

 Corycaeus, Farranula, and Oncaea were well represented at 

 the surface, but only one of the three Oithona species appeared 

 there. 



