I02 BULLETIN OP THE BUREAU OF FISHERIES. 



Table III. — Directive Responses of Menticirrhus saxatilis to Sound. 



The grand total of occurrences in a possible 2,500 in the half of the tank nearer 

 the sound was 968, or 39 per cent. 



Young swellfish (Spheroides maculatus) , as can be seen from table iv, show much 

 the same condition as the kingfish, though they were found rather more frequently 

 (42 per cent) in the region of the sound center than the kingfish (39 per cent). 



Table IV.— Directive Responses of Spheroides maculatus to Sound. 



The grand total of occurrences in a possible 2,500 in the half of the tank nearer the 

 sound was 1,039, or 42 per cent. 



The butterfish (Poronotus triacanthus) is by no means easily kept in confinement 

 and records were obtained from only one lot of five such fishes. These records show 

 that the occurrences of this fish in the half of the tank next the sound center were 47 

 per cent of the total; in other words, this fish had apparently a slight tendency to keep 

 away from the sound center. This tendency, however, was so slight and the records 

 were based upon such a small number of individuals that not much confidence can be 

 placed in these results. 



Of the five fishes thus far discussed, four {Tautoga, Stenotomus , Menticirrhus, and 

 Spheroides) showed unmistakable evidence of the avoidance of a sound center and are 

 in strong contrast with a second class of fishes which we found to approach such a center. 



