516 DISCOVERY REPORTS 



roll. The fluctuations in the number of Copepoda, though small, are shown in Fig. 2 



for comparison with other records. 



20 



10 



COPEPODA 



-1 1 r~ 



5 



-1 1 1 — 



10 



~i 1 1 — 



20 



RECORDER SECTIONS 



Fig. 2. Variations in the numbers of Copepoda taken on the first continuous 

 plankton record over a distance of 41-4 miles. 



Record 2 



Date: 4. xii. 25. 



Time: 0940-1845. 



Position: 30° 02' 50" S, 13 06' 30" W to 30° 19' 40" S, 12 37' 30" W. 



Distance by ship's log: 27-4 miles. 



Again the plankton was very poor in quantity, except for a remarkably dense and well- 

 defined patch of Salpa longicauda some 8 miles across. In this distance over 2300 salps 



600 

 500 

 400 

 300 

 200 



ioo4 



SALPA LONGICAUDA 



CHAETOGNATHA 



I I - I [q 



SAPPHIRINA 



si 







10 15 



RECORDER SECTIONS 



20 



25 



Fig. 3. Variations in the numbers of the predominant plankton organisms 

 on Record 2, taken over a distance of 27-4 miles. 



were taken by the recorder, and not a single specimen was found on the roll before or 

 after the patch was encountered. The copepod Sapphirina, which is associated with 



