ii6 



BUIvLETiN OF THE BUREAU OF FISHERIES. 



In young fish 6 mm. in length (fig. 66) the depth of the body in proportion to its 

 length has increased materially. Black chromatophores are sparsely scattered over 

 the anterior two-thirds of the body, being most abundant in the area corresponding to 

 and adjacent to the heavily pigmented areas in the preceding stage. 



Figure 67 illustrates a young fish 15 mm. in length. The dorsal, anal, and caudal 

 fins are now well differentiated, and the young fish is gradually assuming the general 

 appearance of the adult. 



Fig. 67. — Young fish 15 mm. in length. 



Fig. 68.— Adult fish. , 



PORONOTUS TRIACANTHUS. 



ANCHOVIA ARGYROPHANA (Cuvier and Valenciennes). ANCHOVY. 



Spawning. — The eggs of this species were present in small numbers in the plankton 

 off Gay Head throughout August. They were at no time abundant, and none were 

 taken in Woods Hole Harbor. The species probably spawns in offshore waters. Spawn- 

 ing probably occurs regularly in the evening. Eggs taken at the same hour on suc- 

 cessive days were in approximately the same phase of development. Newly spawned 

 eggs were not observed. 



During the latter half of August adult fish were taken occasionally. Some of 

 these were spent and none were found ripe for stripping. 



