LISTS OF SPECIES BY STATIONS 



29 



Between stations 20 and 21 

 August 23, 1928; 16° 01' N, 37° 52' \V; 26 species 



Acartia longircmis. . . . 

 Calanus minor 



propinquus 



Calocalanus pavo . . . . 

 Candacia bispinosa. . . 



simplex 



Ccntropages furcatus. 

 Corycaeus clausi 



speciosus 



Corycaeus typicus f 



Euchaeta marina f 



Euchirella brevis r 



Farranula carinata a 



gibbula f 



gracilis 3 



rostrata f 



Luciciitia clausii a 



longicornis f 



Miracia efferata f 



Oncaea venusta a 



Paracalanns parvus c 



Pleuronianima xiphias r 



Pseudocalanus niinutus c 



Sapphirina auronitens f 



Scolecithrix danae a 



Undinula vulgaris a 



This surface tow was taken in the night. It contains 12 It thus furnishes good evidence of the nocturnal migration of 

 species which were not found at either station 20 or station these species to the surface, and suggests that they may have 

 21, and is the onl>' Atlantic record for Pleuromamma xiphias. been present at the regular stations below the depths of tows. 



Station 21 

 August 24, 1928; 15° SO' X. 37° 56' W; bottom depth, 4977 m; 30 species 



Depth of tow, m 

 Temperature, °C 

 Salinity, 0/00 



Acartia longircmis 



Calanus helgolandicus. . . . 



minor 



propinquus 



Calocalanus pavo 



stylireniis 



Candacia bispinosa 



Clausocalanus arcuicornis. 



Corycaeus speciosus 



Euchaeta marina 



Farranula carinata 



gibbula 



rostrata 



Macrosctclla gracilis 



Mecynocera clausi 



Megacalanus longicornis 

 Microcalanus pusillus. . . 

 Oithona plumifera 



similis 



spinirostris 



Oncaea conifera 



curta 



media 



minuta 



notopa 



venusta 



Paracalanus parvus 



Pseudocalanus minutus. 



Scolecithrix danae 



Spinocalanus abyssalis. , 



The temperature was high at the surface, and dropped 2° 

 to the SO-meter level and S?S to the 100-meter level. There 

 were 17 species in the surface tow, 18 in the SO-meter tow, and 

 11 in the lOO-meter tow. Eighteen species (60 per cent) were 



confined to a single tow and only 4 were found in all three 

 tows. The surface tow^ was especially rich in species of Oncaea, 

 the 50-meter tow in species of Calanus, and the lOO-meter tow 

 in species of Oithona. 



