74 



DAVID STARB JORDAN. 



spotted trout, is characterized by its very small scales and by the form of 

 its vomer, in which the shaft is depressed ont of line with the head of the 

 bone, and is without teeth at any age. 



The species are all delicate, swift, brightly colored fishes living in 

 mountain streams and lakes, not descending to the sea except in the far 

 north. In general, the charr arc: the most vigorous of the trout, the 

 most gamy and most prized by the angler. The pale spots are bright 

 red when the fish lives in dark pools, yellowish in lakes, and grayish 

 when the fish goes into the sea. AU Salmonidœ become silvery after a 

 stay in salt water. The Iwana is the only pale-spotted species found in 

 Hondo. It may be known from Salvelitms kundscha by the smaller size 

 of its spots, always smaller than the pupil. In Salvelinus malma, the 

 spots are still smaller, and the mouth is smaller, not reaching beyond the 

 line of the eye. 



Our specimens are from Lake Chuzenji, Ubata River at Aomori, and 

 Kawajiri in Rikuchu. The species is often called Amenouwo, but that 

 name is used also for the Yaraabe. 



8. The Malma ; Salvelirms malma (Walbaum). 



This fine charr which is very close to the Iwana abounds in the 

 Aleutian Islands, and westward to Komandorski, the Northern Kuriles 

 and is recorded from Decastris Bay in Manchuria. It differs from the 

 Iwana in the smaller spots, and smaller mouth. We are, however, by 

 no means certain that the Iwana is more than a southern variet)' of this 

 species, as the differences are very slight. 



'.». The Amemasu or Yellow Spotted Trout ; Salverinm k und ne ha 



(Pallas). 



This charr may be known at once by the large yellowish spots, 

 larger than the pupil. It is a northern fish, abundant in Kamchatka, 

 rarely seen so far to the southward as Hokkaido. Our specimens are 

 from Petropaulsky, Tareinsky and Nemuro. "We have examined others 

 from Shinbeshi and Iturup Island. Brevoort records it from Hakodate. 



