ST Aut £0.85 Gt 
(26 species) 
38° 29° 8. 9H° 14° W. Dec. 28, 1928 
See Peiniceas 5299 Me 
ne 
tail ENC OO TEN AOE TIRE TI ES SSR SSE NT gs 
bepth: of te yMe. 0 50 ‘100 ‘Depth of tow,m. 
Temperature, C. 16.9}14.0/10.7) Density,, GtP. 
Salinity, 0/60 Fw. 1 FF. Y 34,0) Hydrogen ion pH 
VoTume of tow, em? Econ | 36 36) Length of tom, miles 
‘me. OAR LATE | OM Bi NO! SIRE 2 ha I le SG oO Se, TEE IT tt nasesen stl OM ee piace vicina ae a teeta en, verre RCRD ot we erent 7 eat be ssdeetedheddtah ad be cnt omienst eae 
4 
Calocalanus pavo a ‘Neocalanus tenuicornis| 
styliremis _ | @ithona brevicornis 
Clausocalanus arcuicornis Similis 
b 
i 
i 
Eucalanus mucronatus | spinirostris 
H 
| 
; 
| Euchirella brevis ee a ,Oithonina nana 
| 
MO © Hh 
Farranula curta ae ae ieyecan curvata 
Bibbula ' | Similis 
rostrata a | Paracalanus: parvus 
Heterornabdus papillager | | 2 |Pseudocalanus minutus 
Mecynocera clausi | | ee /Scolecithrix danae 
Microcalanus pygmaeus ! | Calocalanus plumulosus | 
Neocalanus gracilis | | \Undinula darwini | 
pon ce OSE Guia | longicornis | | | 2 |Vettoria granulosa 
PREFS OR 
| 
Fe 
REMARKS: The temperature was still low at tne surface and dropped six de- 
grees in 190 meters + the salinity and hydrogen ion were moderate and econ- 
Four species were found at the surface,tnirteen in the 50-meter 
tow and twenty in the 100-meter towe Seventeen species ( 65% ) were each 
confined to a single tow and only two were present in all three tows. The 
length of the surface tow was four-tenths Sreater than the other two tows 
but its volume was nine times as largee Since it contained but 4 copepod 
species, one of which was represented by a single specimen, its bulk was 
manifestly due to constituents of the plankton other than tne copepods. 
Although the 50-meter tow contained thirteen speciesymore than 90% of its 
copepods were the single species of Mecynocera-s- Similarly development 
stages of the three species of Oitnhona made up @ large portion of the 100- 
meter towe 

