LISTS OF SPECIES BY STATIONS 



85 



Station 65 

 January 5, 1929; 31° 07' S, 86° 39' W; bottom depth, 3626 m; 42 species 



Depth of tow, m 

 Temperature, °C 

 Sahnity, 0/00 

 \'ohiine of tow, cm^ 



Acartia danae 



negligcns 



Acrocalanus gibber 



gracilis 



Calanus minor 



Calocalanus plumulosus. . . 



Candacia simple.'c 



Clausocalanus arcuicornis. 

 Corycaeus agihs 



dubius 



flaccus 



pacificus 



pumilus 



typicus 



Farranula carinata 



gibbula 



rostrata 



Hetcrorhabdus papilhger, . 

 Luciciitia clausii 



Havicornis 



Mecynocera clausi 



Metridia lucens 



Microcalanus pygmaeus. . . . 



Microsetella rosea 



Neocalanus gracilis 



robustior 



tenuicornis 



Oithona attenuata 



fallax 



setiger 



similis 



spinirostris 



Oncaea minuta 



venusta 



Paracalanus parvus 



pygmaeus 



Pleuromamma abdominalis. 



gracilis 



Pseudocalanus minutus. . . . 



Sapphirina salpae 



Scolecithrix danae 



Undinula darwinii 



The temperature was moderate at the surface and dropped 

 5?5 in 100 meters; the salinity and hj'drogen-ion concentra- 

 tion were fairly high and constant. Thirteen species were 

 taken at the surface, 21 in the SO-meter tow, and 31 in the 

 100-nieter tow. Twenty-seven species (64 per cent) were each 

 confined to a single tow and 8 were present in ail three tows. 

 Corycaeus, Farraniila, and Oithona were well represented in 

 species, and although there were only 2 species of Oncaea 

 they were both abundant in the two deeper tows. The 4 



specimens of Metridia lucens in the 50-meter tow constituted 

 the largest number of the species taken at any station in the 

 eastern Pacific. Mecynocera, which was represented by a 

 single specimen in the four preceding surface tows, is here 

 common in the 50-meter tow and abundant in the 100-meter 

 tow. Ileterorhabdus, the three Neocalanus species, and Pleuro- 

 mamma appear only in the 100-meter tow. The surface tow 

 was virtually an exclusive colony of Clausocalanus, the other 

 species combined failing below 10 per cent. 



