14 



NORTHERN ZOOLOGY. 











DlMl 



JNSIONS. 















Inches. 



Lines. 







Inches. 



Lines 



Length 



from 



tip of nose to extremities of 







Length 



of lower-jaw . 



. 3 



5 



caudal fin 





23 



6 



jj 



pectorals .... 



2 



10 



» 



)j 



end of scales on central rays 







>i 



ventrals .... 



. 2 



10 







of ditto 



20 



9 



jj 



longest rays of first dorsal 



2 



7 



it 



j» 



end of second dorsal 



17 



2 



»> 



attachment of ditto . 



. 5 



10 



yy 





end of anal 



16 



4 



*> 



longest rays of second dorsal . 



2 



2 



>> 



»> 



anus , 



14 







j) 



posterior rays of ditto 



. 1 







jj 



,, 



end of membrane of first 







>> 



attachment of ditto 



4 



6 







dorsal . 



11 



9 



)> 



longest rays of anal . 



. 2 



3 



jj 



» 



first spine of ditto . 



6 



3 



)> 



posterior ray of ditto 







11 



>) 



s» 



tip of gill-cover . 



6 



2 



» 



attachment of ditto . 



. 2 



3 



j) 



j) 



anterior margin of orbit . 



1 



8 



)j 



lobes of caudal 



3 



6 



» 



of axis of orbit 



1 



1 



» 



central rays of ditto . 



. 1 



10 



V 



one 



intermaxillary . 



2 



4 



Depth of caudal fork .... 







10 



» 



one 



labial .... 



2 



3 











The Okow, or Horn-fish*. 



The Okow inhabits the rivers and lakes of the fur countries up to the fifty-eighth 

 parallel, and is, in all probability, the same species with the L. Americana. 

 Specimens that I prepared at Cumberland-house, in 1820, would have enabled me 

 to decide this matter, but, as I have mentioned in the preface, they have been 

 accidentally destroyed ; and on referring to my original notes of the characters of 

 the recent fish, I perceive a few discrepancies betwixt them and the description in 

 a preceding page of L. Americana, particularly in the position of the anus being 

 under the commencement of the second dorsal, and not under its fifth ray. As the 

 notes in question, though carefully drawn up, were my first attempt at ichthyological 

 description, I do not found much upon them, but I deem it safer to place them 

 before the reader, rather than to run the hazard, on the one hand, of creating a 

 nominal species, or, on the other, of confounding two together, and thus producing 

 an error in our account of their geographical distribution and habits. My notes, 

 moreover, contain an account of the viscera, which is omitted in the Histoire des 

 Poissons. 



The Okow spawns in May, soon after the ice breaks up. At that period, and 

 during the summer months, it is taken abundantly in gill-nets ; but as it is seldom 

 or never seen in the winter, it very probably passes that season in the deepest 

 recesses of the lake. It is a well-flavoured, delicate fish, though, being too poor to 



* Perca fluviatilis, var. ? ? Rich. Fr. Journ., p. 725, An. 1823. 



Okow, Crees. Picarel, or Dori, Canadians. Horn-fish, Fur-traders. 



