LISTS OF SPECIES BY STATIONS 



155 



Station 147 

 October 17, 1929; 27° 27' N, 138° 14' VV; bottom depth, 4840 m; 67 species 



Depth of tow, m 

 Temperature, °C 

 Salinity, 0/00 

 Volume of tow, cm' 



Acartia clausii 



danae 



Acrocalanus gibber 



gracilis 



Aetideus armatus 



Calanus minor 



propinquus 



Calocalanus pavo 



styliremis 



Candacia bispinosa 



simplex 



Canthocalanus pauper. . . . 

 Centropages elongatus. . . . 

 Clausocalanus arcuicornis. 



furcatus 



Clytemnestra rostrata. . . . 



scutellata 



Copilia quadrata 



vitrca 



Corycaeus catus 



crassiusculus 



dubius 



robustus 



speciosus 



typicus 



Eucalanus attenuatus 



elongatus 



Euchaeta acuta 



marina 



Euchirella curticauda 



Farranula carinata 



gibbula 



rostrata 



Haloptilus longicornis 



Labidocera detruncata 



Lubbockia aculeata 



squillimana 



Lucicutia clausii 



flavicornis 



Mecynocera clausi 



Megacalanus longicornis . . . 

 Microcalanus pusillus 



pygmaeus 



Microsetella rosea 



Neocalanus gracilis 



robustior 



tenuicornis 



Oithona similis 



spinirostris 



Oithonina nana 



Oncaea media 



minuta 



notopa 



similis 



venusta 



Paracalanus aculeatus 



parvus 



pygmaeus 



Pareuchaeta tonsa 



Pseudocalanus minutus. . . . 

 Sapphirina auronitens 



metallina 



opalina 



Scolecithricella auropecten. 



Scolecithri.x danae 



Undinula caroli 



darwinii 



r 



a 



1 



c 



c 



29 



c 



The temperature was fairly high at the surface and fell 4?2 

 in the 100 meters; the salinity diminished and the hydrogen- 

 ion concentration increased very slightly. Fourteen species 

 were captured at the surface, 33 in the 50-meter tow, and 

 53 in the 100-meter tow. Fort\-three species (64 per cent) 

 were each confined to a single depth and 8 were distributed 

 at all three depths. The length of the three tows was prac- 

 tically the same, but the \olume of the 100-meter tow was 



twice as large as that of either of the others. Corycaeus, Far- 

 ranula, and Oncaea were present in each of the tows, but 

 Candacia and Oithona did not appear at the surface. In the 

 surface tow the Labidocera detruncata were almost entirely 

 adult males and development stages. These being abundant 

 at the surface, in all probability the 2 specimens recorded 

 for the SO-meter tow and the 1 specimen for the 100-meter 

 tow got into the net while it was being lowered or raised. 



