76° 



74° 



72° 



70° 



81° 



80° 



79° 



FIGURE 2. — Plankton sampling stations RV AtXan- 

 tis II Cruise 52. 



FIGURE 4.— Plankton sampling stations RV Gosnold 

 Cruise 175. 



42' 



40° 



38' 



CAPE COD 



NEW YORK 





7 



• • 



1.2.3,&4 



X 



74° 



72° 



70° 



16° 



14° 



12° 



FIGURE 3. — Plankton— sampling stations RV Knorr 

 Cruise 19-5. 



FIGURE 5.— Plankton sampling stations RV Atlan- 

 tis II Cruise 59. 



