LISTS OF SPECIES BY STATIONS 



M3 



Station 134 

 September 12, 1929; 27° 45' N, 135° 22' \V; bottom depth, 4528 m; 46 species 



Depth of tow, m 

 Temperature, °C 

 Salinity, o/oo 

 \olume of tow, cm' 



Acartia danae 



Acrocalanus gibber f 



gracilis f 



Calanus minor 



Calocalanus pavo 



styhremis 



Candacia simplex 



Canthocalanus pauper 



Centropages violaceus 



Clausocalanus arcuicornis r 



Corycaeus crassiusculus 



lautus f 



longistylis f 



pumilus 



speciosus 2 



Eucalanus elongatus 



Euchaeta marina 



Euchirella brevis 



Farranula carinata 



concinna 1 



gibbula c 



rostrata c 



Haloptilus longicornis 



Labidocera detruncata. . . 



Lucicutia clausii 



Macrosetella gracilis 



Mecynocera clausi 



Megacalanus longicornis. 

 Microcalanus pusillus. . . . 



Miracia efferata 



Neocalanus gracilis 



robustior 



tenuicornis 



Oithona attenuata 



similis 



spinirostris 



Oithonina nana 



Oncaea media 



minuta 



tenella 



venusta 



Paracalanus aculeatus. . , 



parvus 



pygmaeus 



Sapphirina metallina . . . 

 Undinula darwinii 



2 

 3 



r 

 c 

 f 



c 

 2 

 f 



c 



f 



a 

 2 

 3 

 a 



The temperature was high at the surface and dropped 4? 7; 

 the salinity and hydrogen-ion concentration remained prac- 

 tically unchanged. Fourteen species were taken at the sur- 

 face, 22 in the SO-meter tow, and 28 in the 100-meter tow. 

 Twenty-nine species (63 per cent) were each confined to a 

 single tow, and 1 species alone was present in all three tows. 



Farranula, e.xcept carinata, appeared only at the surface, 

 but Corycaeus, Oithona, and Oncaea were distributed in all 

 the tows. The SO-meter tow was 10 per cent shorter than 

 either of the other two, but its volume was SO per cent 

 larger. Candacia simplex, which is usually' nearer the surface, 

 was here found onU' in the 100-meter tow. 



Between stations 134 and 135 

 September 13, 1929; 26° 44' N, 138° 27' W; 29 species 



Acartia danae c 



Acrocalanus gracilis f 



Calanus minor f 



propinquus 1 



Calocalanus pavo f 



Centropages furcatus 2 



Clausocalanus arcuicornis 2 



Clytemnestra rostrata f 



scutellata f 



Corycaeus longistylis 2 



Corycaeus speciosus f 



Euchaeta marina f 



Farranula carinata a 



gibbula r 



rostrata r 



Labidocera acutifrons c 



Macrosetella gracilis 2 



Mecynocera clausi r 



Microsetella rosea f 



Neocalanus robustior c 



Neocalanus tenuicornis 2 



Oithonina nana r 



Oncaea media f 



minuta f 



venusta c 



Paracalanus parvus c 



Pontellina plumata 2 



Sapphirina auronitens 3 



Undinula darwinii a 



X'oiume of tow, 32cm^; length. 0.1 mile; surface only. This 

 nocturnal tow between stations yielded 29 species. Two 

 species were obtained that were not found at either station 

 134 or 135, and 50 species obtained at one or both of those 

 stations do not appear here. Many species also which were 



found at the regular stations in the two deeper tows alone 

 are present here at the surface. These marked differences 

 again furnish good evidence of nocturnal migration and sug- 

 gest that this tow was taken after midnight, when the down- 

 ward mo\ement had already been in progress for some time. 



