LISTS OF SPECIES BY STATIONS 



31 



Station 23 

 August 29, 1928; 10° 50' N, 37° 24' W; bottom depth, 4787 m; 60 species 



Depth of tow, m 

 Temperature, °C 

 Salinity, 0/00 



Acartia longiremis 



Calanus helgolandicus. . . 



minor 



Calocalanus pavo 



Candacia aethiopica 



bispinosa 



falcifera 



simplex 



varicans 



Centraugaptilus rattrayi . 

 Centropages furcatus. . . . 



Copiha denticulata 



Corycaeus agilis 



crassiusculus 



lautus 



pumilus 



speciosus 



typicus 



Eucalanus elongatus 



Euchaeta marina 



Euchirella brevis 



Farranula carinata 



curta 



gibbula 



gracilis 



rostrata 



Haloptilus longicornis. . . . 



ornatus 



Heterorhabdus papilliger. 

 Labidocera nerii 



29 



f 



f 



r 



Lucicutia clausii 



flavicornis 



Macrosetella gracilis 



Mecynocera clausi 



Megacalanus longicornis. 



Metridia longa 



Microcalanus pusillus. . . , 

 Microsetella norvegica. . . 



Miracia efferata 



Oithona setiger 



similis 



spinirostris 



Oithonina nana 



Oncaea conifera 



media 



niinuta 



notopa 



tenella 



venusta 



Paracalanus parvus 



Phaenna spinifera 



Pontellina plumata 



Pontellopsis perspicax. . . 



regalis 



Pseudocalanus minutus. 

 Rhincalanus nasutus. . . . 



Sapphirina angusta 



Scolecithrix danae 



Spinocalanus abyssalis. . 

 Undinula vulgaris 



The temperature, high at the surface, dropped about 6° at 

 a depth of 50 meters and an additional 4?4 at 100 meters. The 

 number of species is increased to 60, 34 of which were found 

 at the surface, 30 in the 50-meter tow, and 30 in the 100- 

 nieter tow. Thirty-five (58 per cent) were confined to a single 

 depth and 9 were found at all three depths. Species of Cory- 



caeus and Oncaea were again especially abundant at the 

 surface, and this tow contained one of the two Atlantic 

 records of Pontellopsis regalis: the other was made at station 

 24 below; the species is rare at both stations. In the 100-meter 

 tow we find the only record of Centraugaptilus rattrayi and of 

 Candacia falcifera for the cruise. 



