UKNKKAI, HKSCIUPTIuN. U5 



markings, and with n very taint indication of dnsky red on 

 the margins. 



Altogether, the Si.skawit/. is u greener eoluured and less 

 lustrons fish than the Namaycush, and far less distinctly 

 spotted; still there is so iniich siniihirity, that l)y a person not 

 nccustonu'd to look for nicir and more pciinanent structural 

 distinctions, the two species might he wvy icadily confomidcd. 



In form the Siskawitz is rather shorter and stouter than 

 the Mackinaw ti^h, and doi-s not ta[)er nearly so much at either 

 extremity. The head particularly, which in the other is very 

 small, neatly shaped, and depressed towards the snout, is short, 

 thick, and very obtusely rounded, giving it a coarse and clumsy 

 protilc, and distinguishing it decidedly from the kindred species. 

 On the shoulders it is moderately broad, with the sides some- 

 what compressed. The length of the head is about one-fourth 

 of the whole length of the fish, from the snout to the tips of the 

 caudal. The skull is strong and bony, with powerful lower 

 jaws. The porous lines and foramina of the bones, seen on the 

 heads of several of the otlur Trouts, are very evident, and 

 distinctly marked in this, as are the radiating processes on the 

 opernilum and pre-opernilinn. 



'The prc-ajjcrriilitin is considerably rounded, and almost 

 vertical; the posterior free margin of the gill-covers is nearly 

 semicircular, much less acute posteriorly than in the Namaycush. 



It has n ver}' complete and formidal)le dental system, all the 

 maxillary and palatine bones, as well a.s the lower jaws anti 

 either side of the tongue, being armed with strong, sharp, 

 curved tc«th, and the vomer provided ^^ith a double line 

 extending along the wliolc length backward. The dorsal fin is 



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