THE ARCTIC GRAYUXG. 



THE GRAYLINGS. 



Effigiens oculis celeri umbra natatii. 



AusoNius ; The Moselle. 



'p\VO species of the genus Thymallus occur in North America, one the 

 Arctic Grayling T. sigmfer, the other the Michigan Gravlinc. T 

 tncolor, the diagnostic characters of which are thus defined by Bean ■ 



SPECIES OF GRAYLING. 



The Arctic Grayling was first found by Capt. John Franklin's expedi- 

 tion toward the North Pole, in .819, and .ailed Tky.nallus sisnifn; by 

 Sir John Richardson, who thus describes its discovery: «=> ^ ' > 



- This very beautiful fish abounds in the rocky streams that flow throu<rh 

 the primitive country lying north of the sixty-second paralle 1 etwee 

 -Mackenzie's River and the Welcome. Its hi<dilv 2.m^raL\^^Tv. uetueen 

 name Hewlook-Powak,') denoting ^ wing-bfe ' al X^^rinZ;^ 

 dorsal, and It was in reference to the same feature that I besto'V no the 

 specific appellationof &:^v/./-.r or the 'standard-bearer ' inte ml ^n n 

 advert to the rank of my companion, Captain Back fh^ ! ,^V ^° 

 who took the first specimen tha't we saivtu'hX^n 'fie TSy^ "It tfoZl 

 only in clear waters, and seems to delight in the most raiid nnrV^.f 

 mountain streams." As is implied in^hese r^aX th™^^^ 



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