THK SALMON AND TROUT OL'' JAPAN. 



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active and vigorous, taking the hook readily in the mountain streams. 



The fish called Salmo macrostomus by Günther is the same as S. 

 perry 7. There may he other species of true Trout or Salmo io Japan, 

 but all that we have seen certainly belong to one species. 



Our specimens ave from Lake Chuzenji, Kinu River at Utsimomiya, 

 J)aiya River at Nikko, (Hani Hiver near Nikko, Maebara and Karasaki 

 on Lake Biwa, Kawajiri in Rikuchu. Kitakami Hiver, Aomori, Hakodate, 

 and the market at. Tokio. It is the only trout or salmon found by us in 

 Lake Biwa. In Lake Biwa, the fish is called AmenouwO. 



Besides the native Yamabe two other species of Salmo, the American 

 Land-locked Salmon {Salmo salar sébago) and the European Brook 

 Trout or Forelle, (Salmo farió), have been introduced into Japan. The 

 latter species, which much resembles the Yamabe, 1 found in Chuzenji 

 Lake. 



6. The Ito- Two or J îlackiston's Trout ; Hi/cl/o blackistoni 

 (Hilgendorf). 



.Most interesting of the .Japanese trout is the long, slender pike-like 

 species, called for its slimness the Ito-Uvvo. This belongs to the genus 

 HucJio. characterized by its flattened head, large mouth, and by the 

 absence of teeth on the shaft of the vomer, which is formed as in 

 Salvelinus. The scales arc silvery, finely speckled with black, ami in 

 this and other respects, the genus is intermediate between Salmo and 

 Salvelinus. The anal fin is short as in Salvelinus, and the gill rakers 

 are few. The scales are about 118. Two species of Hucho are known, 

 one, Hucho hucho, from the Danube, the other. Hucho blackistoni of 

 Japan. 



Hucho blackistoni is found in mountain streams of the north where 

 it said to reach a length of -lh feet. Our specimen, received through the 

 kindness of Mr. Nozawa, is from Kushiro. We have examined others 

 from Nemuro, Chishima, Settsu and from Heigun River in Rikuchu. 



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7. The Iwana or Rain Chai r ; Salvelimus pluvius (Hiigendorf). 

 The genus Salvelinus containing the charrs, red-spotted and white- 



