The Leart Whitefish 



half that of first; longest anal ray 2f in head, and more than 

 twice as long as the last; pseudobranchise very large; tongue 

 with traces of teeth. Colour, light iridescent blue on back, 

 with a few fine dark punctulations reaching about 2 scales below 

 lateral line; sides and under parts rich silvery, brighter than in 

 any other of our Coregonimv, much as in Hiodon and Alhnla; top 

 of head light olivaceous; cheeks silvery; dorsal, caudal and pec- 

 torals with some dark on their margins; anal and ventrals white, 

 with some dark dustings; the male perhaps a little richer, more 

 iridescent blue on back, and with the scales a little thicker and 

 less closely imbricated. 



Leart Whitefish 



Argyrosomns piisillus (Bean) 



This is perhaps the smallest of American whitefishes, rarely 

 reaching a foot in length and \ pound in weight. It has the 

 reputation of being more bony than any other species. Its 

 habitat includes practically all of Alaska except the south-eastern 

 portion. It is little used as food except for dogs. Nothing is 

 known as to its habits. 



Great Bear Lake Herring 



Argyrosomns lucidus (Richardson) 



The herring of Great Bear Lake is little known. The only 

 specimens we have seen are 2 obtained in 1894 by Miss Elizabeth 

 Taylor and donated to Stanford University. These are each 16 

 inches long and are the only specimens received by any museum 

 since Richardson's time, more than half a centurv earlier. 



Lauretta Whitefish 



Argyrosonms laurettce (Bean) 



This species is known only from the Yukon River northward to 

 Point Barrow where it is said to be not uncommon. Nothing is 

 known regarding its habits. It is close to A. lucidus, but seems to 

 have a longer dorsal fin. 



137 



