284 



BULLETIN OF THE BUREAU OF FISHERIES. 



18. Alosa sapidissima (Wilson). Atlantic Shad. 



The shad has extended its range far northward. The cannery at Fairhaven took one aljout Julyl, 

 190:!, and the fishermen at Birch Point got about 3,000 in one day. The species has been reported from 

 Stikine River and in 1904 it was taken at Kasdof, on Cook Inlet. 



Fig. 8. — .\losa sapidissima (Wilson). 



Family 13. SALMOXin.4:. The Salmons, Trouts, and VVhitefishes. 

 19. Coregonus kennicotti Milner. Kmiiicott's Wliilijish. 



Two specimens, (i and G.2.5 inches long, were secured at Lake Bennett. 



Scales 13-76 to 82-8; gillrakers 5+14 (right), 7 + 12 (left), rather long and slender, somewhat 

 blunt tipped, Init fli'mer than in C. quadnlateralis, their length about diameter of pupil. 



This species may lie readily distinguished from the round whitefish found in the same waters by 

 the somewhat larger mouth, longer and more numerous gillrakers, larger and much more caducous 

 scales, and more elevated back. 



This species of whitefish is probably common in Lake Bennett, Tagish Arm, Lake Atlin, and other 

 headwaters of the Yukon. It has been previously recorded from Alaskan localities as follows: Yukon 

 River at Nulato and St. Michael (Bean 1882), Middle Kobuk River (Townsend 1887), rivers about 

 Point Barrow (Murdoch 1885), St. Michael (Nelson 1887), and Barter Island near the mouth of the 

 Mackenzie River (Scofield 1899). 



20. Coregonus quadrUateralis Richardson. Round Whitefish. 



Twenty-five specimens, 3.75 to 11.5 inches long, seined in Lake Bennett, and 4 at Caribou Crossing. 



Scales 10-95 to 100-8; gillrakers very short and weak, about 7+10. 



This is apparently the most abundant species of whitefish in the headwaters of the Yukon. The 

 young were very abundant in Lake Bennett, where many examples were seined in sliallow water. It 

 appeared to be less common at Caribou Crossing. 



One large example was obtained, August 5, by Dr. Gilbert in Wood River at the upper trap. 

 Gillrakers 6+8 and 8+10, short, blunt, and weak; scales 10-101-8. 



Color in life, light olive; scales darker edged, sides silvery; 13 diffuse, roundish, dusky blue spots 

 along lateral line and 2 or 3 above it posteriorly; vestiges of parr-marks; upper fins very slightly red- 

 dish olive, lower bright creamy orange; opercle and shoulder bar creamj' orange. 



At Caribou Crossing this whitefish is of considerable importance as a food fish. The principal 

 supply is said to come from Lake Atlin, where it is caught in winter as well as at other seasons. It 

 is doubtless common in all suitalile waters in the Yukon Basin. 



This species has previou.sly been recorded from the following Alaskan localities: Yukon River at 

 Nulato and Fort Yukon (.Bean 1882); Yukon River at Nulato and Unalakleet River (Nelson 1887); and 

 Yukon River at Fort Yukon (Turner 1886). 



