APPENDIX. 521 



is so disagreeable that it is never eaten except in times 

 of scarcity. Its roe, however, which is composed of 

 very small ova, makes good bread when beaten up 

 with a little flour; and even when cooked alone, it 

 forms cakes that are very palatable as tea bread, though 

 rather difficult of digestion. 



There are other fish not so generally distributed, but 

 which are of importance in particular districts. Thus, 

 the fishery at Cumberland House, on the Saskatchewan, 

 yields, in addition to those we have mentioned, the 

 American sandre {lucioperca Americana) ; the mathemeg 

 (jnmelodus borealis); the tullibee, a species of core- 

 gonus ; the naccaysh (hiodon chrysqpsis, F. B. A. p. 232. 

 311. pi. 94. f. 3. A. B. C.) ; and the sturgeon (acipenser 

 Rupertianns) . 



None of the fish named in the last paragraph go so 



far north as Great Slave Lake ; but we find there the 



salmo Macke?izii, which ascends from the Arctic Sea, and 



does not exist in the more southern waters. This fish, 



though agreeing with the trouts in the structure of the 



jaws, differs from all the subgenera established by Cuvier 



in the Regne Animal, in having the teeth disposed in 



velvet-like bands, which are narrow on the tips of the 



jaws, and broader on the vomer and palate bones. 



From the crowded minute teeth, the name of Stenodus 



may be given to the subgenus, of which the inconnu or 



salmo Mackenzii is the only ascertained species. Back's 



grayling [thymallus signifer), and the round-fish (core- 



gonns quadr Hater all s), abound in the clear rivers which 



fall into the north and east side of Slave Lake, and in 



the waters in higher latitudes. They exist, but not 



numerously, in Great Bear Lake also ; but the most 



abundant fish in that vast piece of water is the Bear 



Lake herring-salmon (corregonas lucidus). The in- 



