LISTS OF SPECIES BY STATIONS 



45 



Between stations 35 and 36 (c) 

 October 28, 1928; 4° 16' N, 79° 37'-47' W; 72 species 



Depth of tow, m 

 \'olume of tow, cm' 





 U)0 



50 

 48 



Depth of tow, ni 



Length of tow, miles 





 1.0 



50 

 3.2 



Acartia danae 



negligens 



Acrocakmus gibber 



gracilis 



longicornis 



Aegisthus spinulosus 



Calanus minor 



Calocalanus pavo 



plumulosiis 



Candacia bispinosa 



pachydactyla 



simplex 



truncata 



Canthocalanus pauper. . . . 

 Centropages calaninus. . . . 



furcatus 



violaccus 



Clausocalanus arcuicornis. 



furcatus 



Clytcmnestra scutellata. . . 



Copilia quadrata 



Corycaeus agilis 



clausi 



crassiusculus 



dubius 



lautus 



limbatus 



pumilus 



Eucalanus attenuatus 



crassus 



elongatus 



monachus 



Euchaeta acuta 



marina 



Farranula carinata 



concinna 



Farranula curta 



gibbula 



rostrata 



Gaetanus minor, juv. . . . 

 Labidocera acuta 



detruncata 



Lubbockia squillimana. . 

 Macrosetella gracilis. . , . 



Mecynocera clausi 



Microcalanus pusillus. . . 



pygmaeus 



Microsetella rosea 



Neocalanus gracilis 



robustior 



Oithona attenuata 



brevicornis 



plumifera 



similis 



spinirostris 



Oncaea curta 



media 



minuta 



subtilis 



venusta 



Paracalanus aculeatus. . 



parvus 



pygmaeus 



Pleuromamma gracilis. . 



Pontellina plumata 



Pseudocalanus minutus. 

 Rhincalanus cornutus. . . 

 Sapphirina angusta 



ovatolanceolata . . . . 

 Temora discaudata 



stylifera 



Undinula vulgaris 



c 

 f 



Id' 



2 

 1 

 f 

 c 

 c 



r 

 f 

 1 

 4 

 3 

 f 

 c 

 c 

 a 



This record includes the tliird of the nocturnal surface tows 

 and an additional 50-meter tow; time, 9''40"' p.m. to 12''50'" 

 A.M. The former contains only 2 species not found in the 

 other surface tows, but it does not contain 50 species that 

 were found in them, thereby e\en surpassing them in diver- 

 sity. Forty-one species were found in the surface tow and 58 



in the 50-meter tow; 27 species were present in both tows, and 

 45 were each confined to a single tow. Nocturnal tows at 

 lower levels yield interesting comparisons with surface hauls. 

 The volume of the 1-mile surface tow is three and one-third 

 times that of the 3-mile 50-meter tow, and yet the latter con- 

 tained 17 more copepod species than the former. 



