426 



BULLETIN OF THE BUREAU OF FISHERIES. 



from pond to pond where these ponds communicated with each other. Figure 76 shows 

 the arrangement of the ponds, the general distribution of the water supply, the species 

 of the fish, and the incidence of the disease. The following observations on this diagram 

 were made at the time : 



Empty. 



II 



Brook trout 2 years old; lot 

 1934 A; no visible evi- 



FIG. 76. Plan of south ponds at Craig Brook station. 



The water supply of ponds i to 1 1 is from a natural spring on the hillside. The 

 water supply of ponds 2 to 10 and 12 to 19 is from Craig Brook, the water of each pond for 

 the most part flowing into the pond immediately below it, pond n flowing into pond 12. 

 As the diagram shows, pond n contained healthy fish. These up to the time of this 



