126 



COPEPODS OF LAST CRUISE OF CARNEGIE 



Station 109 

 May 29, 1929; 23° 22' N, 144° 08' E; bottom depth, 5252 m; 90 species 



Depth of tow, m 

 Temperature, °C 

 SaUnity, o/oo 

 N'olume of tow, cm' 



Acartia danae . . c a 



Acrocalanus gibber f . . 5 



graciUs f f c 



longicornis r f 



Aetideus armatus . . . . 3 



Calanus minor . . f f 



Calocalanus pavo . . 4 f 



plumulosus . . 2 3 



styliremis . . . . 2 



Candacia bispinosa . . f 2 



simplex . . f f 



truncata . . c f 



varicans . . 2 



Canthocalanus pauper . . . . 4 



Centropages calaninus 2 2 



elongatus . . 2 



Clausocalanus arcuicornis 2 f c 



furcatus . . r 



Clytemnestra scutellata . . . . 4 



Copilia denticulata . . f 



mirabilis . . 3 



quadrata 2 f 



recta . . 4 5 



vitrea . . . . 2 



Corycaeus agilis . . r 



crassiusculus f a c 



dubius . . r 



flaccus 1 



lautus r 



longistyHs . . . . f 



pumilus r 



speciosus . . c c 



typicus . . r 



Euaetideus giesbrechti 1 



Eucalanus attenuatus . . f f 



elongatus . . 2 



Euchaeta acuta . . 2 



marina . . a f 



Euchirella brevis 2 1 



Farranula carinata a c 



gibbula c 



gracilis f 



rostrata a f f 



Haloptilus longicornis . . . . f 



Heterorhabdus papilliger . . . . f 



Heterorhabdus spinifrons 



Labidocera detruncata 



Lubbockia squillimana 



Lucicutia clausii 



flavicornis 



longicornis 



Macrosetella gracilis 



oculata 



Mecynocera clausi 



Microcalanus pusillus 



pygmaeus 



Microsetella rosea 



Monstrilla inserta 



Neocalanus gracilis 



robustior 



tenuicornis 



Oithona attenuata 



plumifera 



similis 



spinirostris 



Oithonina nana 



Oncaea conifera 



curta 



media 



minuta 



similis 



tenella 



venusta 



Onchocalanus nudipes, n. sp. 

 Paracalanus parvus 



pygmaeus 



Phaenna spinifera 



Pleuromamma abdominalis. . 



Pontella lobiancoi 



Pontellina plumata 



Pseudocalanus minutus 



Sapphirina angusta 



auronitens 



metallina 



nigromaculata 



stellata 



Scolecithricella bradyi 



Scolecithrix danae 



Undinula caroli 



darwinii 



2cr 



f 



f 



29 



a 



f 



f 

 2 

 f 

 f 



3 



r 



The high surface temperature fell 4° at the 50-meter depth 

 and 4° more at the 100-meter depth; the salinity and hydro- 

 gen-ion concentration remained almost constant. There 

 were 20 species in the surface tow, 57 in the 50-meter tow, 

 and 57 in the 100-meter tow. Fifty-three species (60 per 

 cent) were each confined to a single depth and 7 were present 

 at all three depths. The length of the three tows was almost 



exacth' the same, but the 100-meter tow had twice the 

 volume of the 50-meter tow and four times that of the surface 

 tow. Corycaeus, Farranula. and Oncaea were distributed at 

 all three depths; Candacia, Eucalanus, Euchaeta, and Oithona 

 did not appear in the surface tow. A solitary specimen of one 

 of the 5 Sapphirina species appeared at the surface, but all 

 the others were confined to the deeper tows. The 50-meter 



