Note on the Salmon and Trout of Japan. 



BY 



David Starr Jordan. 



In the Annot. Zool. Jap. for 1902, Jordan and Snyder have given 

 a review of the species of salmon and trout in Japan. Recently, Mr. T. 

 Kitahara has given in the same journal (V., pt. 3, 1904, pp. 1 17-120) some 

 useful criticisms on this paper derived from his experience in the Imperial 

 Bureau of Fisheries. 



Mr. Kitahara is certainly right in thinking that the Salmo perryi of 

 Brevoort is the trout called Ito, Salmo blackistoni of Hilgendorf. That 

 species must therefore become Httcho perryi instead of Hucho blackistoni. 



I think that Mr. Kitahara is also right in identifying the Salmo 

 mason of Brevoort and the Oncorhynchus yessoensis of Hilgendorf with 

 the common trout of Japan called Ame-no-uwo, Kawa-masu or Yamabe, 

 in its different stages of growth. This is the Salmo macrostoma of 

 Günther, the species wrongly called Salmo perryi by Jordan and Snyder. 

 This species should stand as Salmo mason. 



Mr. Kitahara states that the Humpback Salmon (Karafuto-masu) in 

 Japan as in America have black spots on the caudal fin. This species was 

 not seen by Jordan and Snyder in Japan. The supposed humpback 

 salmon or Yezomasu, figured by Jordan and Snyder as Oncorhynclins 

 mason, was probably a dwarfish spawning female of Oncorhynchus beta. 



Mr. Kitahara is probably right in regarding the Ivvana, Salvelimts 

 pluvius (Hilgendorf) the common charr or red-spotted trout of Japan, 

 as inseparable from Salvelinus malma. Salvelinus kundsha, of the Kurile 

 Islands, is however a different fish. The name Salmo milktschitch of 

 Walbaum is earlier than Salmo kisutch Walbaum and is based also on the 

 Silver Salmon. 



