The Greenlings 



The Atka mackerel, which is of course no mackerel at all, 

 is an excellent food-fish, especially fine when salted. There 

 seems to be no good reason why it may not become the object 

 of an important fishery. 



The genus Hexagrammos, which contains the true greenlings 

 or rock trouts, differs from Pleurogrammiis chiefly in having the 

 dorsal fin deeply notched or divided. The species may be known 

 by the presence of 5 lateral lines on each side. All the species 

 attain a considerable size and all are of value as food. They 

 inhabit the North Pacific on both coasts, extending on the Ameri- 

 can side south to California. 



Hexagrammos decagrammtis is one of the most valuable species. 

 it is known as the rock trout, boregat, or bodeiron. It reaches 



a length of 18 inches and is found from Kadiak Island to Point 

 Conception. It is particularly abundant about San Francisco, and 

 is a common food-fish. The sexes are very unlike in colour. 

 H. octogrammus, the Alaska green-fish, occurs among the 





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501 



