. American fishes; a popular treatise upon the game and food fishes of North America, with especial reference to habits and methods of capture. Fishes. THE ARCTIC GRATLIXG. THE GRAYLINGS. Effigiens oculis celeri umbra natatu. AusoNius ; The Moselle. * I "*WO species of the genus Thymallus occur in North America, one, the Arctic Grayling T. signifer, the other the Michigan Grayling T. t7-icolor, the diagnostic characters of which are thus defined by Bean : SPECIES OF GRAYLING. A. Gill-rakers 22 ; pyloric cceca 19 ; maxilla 3^ head; mandible equal to anal base ; eye nearly equal to inter- o
. American fishes; a popular treatise upon the game and food fishes of North America, with especial reference to habits and methods of capture. Fishes. THE ARCTIC GRATLIXG. THE GRAYLINGS. Effigiens oculis celeri umbra natatu. AusoNius ; The Moselle. * I "*WO species of the genus Thymallus occur in North America, one, the Arctic Grayling T. signifer, the other the Michigan Grayling T. t7-icolor, the diagnostic characters of which are thus defined by Bean : SPECIES OF GRAYLING. A. Gill-rakers 22 ; pyloric cceca 19 ; maxilla 3^ head; mandible equal to anal base ; eye nearly equal to inter- orbital space; dorsal when laid back not reaching adipose fin. T. TRICOLOR. jxa. Gill-rakers 18 ; pyloric coeca 18 ; 3-10 head ; mandible much shorter than anal base; eye much less than interorbital space; dorsal when laid back reaching end of adipose fin. T. SIGNIFER. The Arctic Grayling was first found by Capt. John Franklin's expedi- tion toward the North Pole, in 1819, and called Thymallus signifer, by Sir John Richardson, who thus describes its discovery : '' This very beautiful fish abounds in the rocky streams that flow through the primitive country lying nofth of the sixty-second parallel between Mackenzie's River and the Welcome. Its highly appropriate Esquimaux name (' Hewlook-Powak,') denoting ' wing-like,' alludes to its magnificent dorsal, and it was in reference to the same feature that I bestow upon it the specific appellation of .Sz^/^^T^r or the 'standard-bearer,' intending also to advert to the rank of my companion, Captain Back, then a midshipman, who took the first specimen that we saw with the artificial fly. It is found only in clear waters, and seems to delight in the most rapid parts of the mountain ; As is implied in these remarks, this species is re- markable for its immense dorsal fin, which is nearly twice as high as the "body cf the Please note that these images are extracted from scanned page images that may have been digita
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectfishes, bookyear1888
