Distribution of the Salmonide. 307 
species exist in Russia, Siberia, Alaska, and our great lakes. The 
relation between the Siberian and Alaskan forms has never been 
fully worked out; but species which have been considered identi- 
cal from the two sides of Behring Strait proved upon examination 
to be distinct. The species of Coregonus are anadromous only in 
the far North. One species, which is not represented in America— 
Coregonus oxyrhynehus—leads an existence which is indifferently 
marine or fresh-water. In the United States, the most southerly 
species—and one of the smallest, Coregonus williamsoni—is found as 
far south as the Sevier River, in Utah, in about 38° North lati- 
tude, or eight degrees farther south than any species in the Old 
World. Three species extend as far north as Point Barrow—lau- 
rettæ, nelsoni, and richardsoni, the first and the last of these being 
valuable food species. Coregonus pusillus probably reaches Point 
Barrow also, as I have seen it in Hotham Inlet. 
Vendace (Coregonus albul ia. About 3 natural length. 
Introduced into Me albu lay. Baland Lake, Prussia. A s 
The most easterly of our white fishes are labradoricus, quadrila- 
teralis, and artedi, all of which are small, and the last varies so much 
m the type to the eastward as to make its separation probable. 
The largest species are clupeiformis and richardsoni. Clupeiformis 
is the common white fish of the great lakes. It does not extend 
very far into British America, and is replaced northwestward in 
: ka and the arctic portion of British America by the Coregonus 
richardsoni (kennicotti of late works). os 
Stenodus is believed to be nearly related to Coregonus ; but its 
: have not been fully studied. Its species reach a larger- 
Size than is usual in Coregonus. Only two are known with cer- 
