LXII BIOLOGICAL SOCIETY OF WASHINGTON. 







Thaleichthys pacificus (the Eulachon) occurs in the Gulf of 

 Alaska at least as far west as Katmai, in Shellikoff Straits, where it 

 is preserved in salt and considered quite a delicacy. The Eulachon 

 literally swarms in the southeastern part of the Territory, and is 

 utilized both in a fresh state and for the manufacture of a fat or 

 oil which the natives use in place of butter, and which has been 

 experimented with as a substitute for cod liver oil. 



Thymallus is known to occur from the Bristol Bay region to the 

 extreme northern limit of the Territory, abounding in the rapid 

 rivers. It takes the artificial fly quite readily, according to the 

 testimony of Lieut. Schwatka, and is generally considered an ex 

 cellent food-fish. To the eastward it is known to reach the Mac 

 kenzie river region. 



Stenodtis might be called the giant white-fish. It reaches 50 

 pounds in weight, and has been recorded as growing to a length of 

 5 feet. We have it only from the Yukon river region. It was 

 described, however, from the Mackenzie, and occurs also in the 

 tributaries of that river. It is one of the finest food-fishes of 

 Alaska. 



The most widely distributed of the species of Coregonus is C. 

 quadrilaterals, which we now have from the Yukon river region 

 southward to Kodiak. C. Lauretta is also pretty widely distributed, 

 at least from the Kuskoquim to Point Barrow. The species related 

 to C. Merkii is a small northern form, which is not of much im 

 portance as a food-fish. C. Nelsonii is a hump-back species, not 

 important as a food-fish, ranging from the northern limit of the 

 Territory southward to the Yukon, at least, and probably to the 

 Kuskoquim. C. Kennicottii ranks next in excellence to Stenodus. 

 It is said to reach 30 pounds in weight, and its range is from the 

 Kuskoquim to the northern limit of Alaska. All the Coregoni are 

 important for food except C. Nelsonii and C. Merkii, sub-species. 



Salvelinus is abundant throughout the Aleutians and the main 

 land of Alaska, north to Colville river. In the northern portion 

 of its range it grows to an enormous size, reaching fully 1 2 pounds 

 in weight. In the sea-run condition it is extensively salted at Ko 

 diak, and exported as salmon trout. 



Salmo purpurattis is found in southern Alaska and on the island 

 of Kodiak and Unalashka. It is extremely abundant and attains a 

 weight of 20 pounds. S. Gairdnerii occurs in southern Alaska and 



