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34. Temperature, salinity, and thernnosteric anonnaly distribution across front 2 at the 



surface, as determined on BT pass no. 2 45 



35. T-S curves (on 8 „ field) for the two hydrocasts (2.1 on warm (w) side, 2.2 on cool (c) 



side) at front 2. Numbers against curves indicate depths 46 



36. Track at front 4(23 May 1 960), showing positions of hydrocasts, plastic sampler casts, 



and net tows. The track has been broken and separated at 0821 hrs. (X) for clarity 



of presentation 48 



37. T-S curves (on a 8^ field) for the two hydrocasts (4.3 on the warm (w) side, 4,4 on the 



cool (c) side) at front 4. Numbers against curves indicate depths 49 



TABLES 



1. Observations at fronts 4 



2. Results of net hauls made at the Cape San Lucas Front (front 5) 39 



3. Ratios of major groups of organisms in the net hauls made on the warm side, in the 



middle, and on the cool side of the Cape San Lucas Front (front 5). The ratios are 

 of the counts, and the count of the warm side is set at unity. Ratios are only given 

 when a group was represented in all catche" of a triplet (one exception*) 40 



4. Ratios given in table 3 that indicate probable effects of the front on the distribution of 



animals 41 



5. Summary of oblique 1 m. net hauls at fronts 2 and 4. Counts (from aliquots) have been 



standardized to full sample size and to lO^m.^ of water strained, w = warm side; 



c = cool side 47 



6. Measurements of chlorophyll a made at three depths in the middle and on either side of 



front 4. w = warm side; m = middle; c = cool side 50 



