THE FISHES OF BERING SEA. 437 



Karlnk. It is widely distributed iu Bering Sea, but in relatively small numbers. 

 Although superior in quality to the other species and mncli larger, it is not abundant 

 enough to be of much value to the canuer. ISot seen by Stejneger on Bering Island, 

 but he reiiorts that it is occasionally taken there and on Copper Island mostly iu 

 August. 



26. Oncorhynchus gorbuscha (Walbaiim). Gorbuscha; Humpback salniou. 



Common in Bering Sea; seen by us at Karluk. Two adult specimens from Petro^ 

 paulski Harbor. The young common in the salt lagoon on St. Paul. Recorded 

 by Dr. Steindachner from Decastris Bay, by Dr. Bean from Plover Bay, and by 

 Stejneger from Bering Island. 



27. Salmo mykiss Walbaum. Mykiss; Somka; Kamchatka saliuon-tront. (Plate XLIII.) 



By an unfortunate error, the writers have heretofore used the name Salmo myMss 

 for the Cut-Throat trout of the Northwest. It was known that the Cut-Throat was the 

 only true or black-spotted trout in Alaska, and it was assumed that its range extended 

 along the coast to all streams in Bering Sea. But our recent explorations have shown 

 that it probably does not occur in Bering Sea, nor is there any undoubted record to 

 the north of Wrangel. If it reaches Kadiak, or Sitka, or Prince William sound, it 

 is only rarely, and the streams of the Aleutian Islands and the east coast of Bering- 

 Sea contain no species of Salmo. The name Salmo myMss must therefore be restricted 

 to the Kamchatkan species, while the species of the American rivers heretofore called 

 Salmo myldss must be Salmo clorlci. 



We have therefore studied with great interest a specimen of the genuine Salmo 

 mykiss, the first on record since the times of Pallas, Krascheninnikof, and Steller. The 

 specimen, an adult male 960 mm. long, was taken by Dr. Leonhard Stejneger, Septem- 

 ber 15, 1897, in the Kalakhtyrka River, near Petropaulski, Kamchatka. It was called 

 '' sonka" or " somka " by the natives. It is said to occur rarely and to be found in but 

 few rivers, the Kalakhtyrka among them. It is considered to be superior as food to 

 other Salmonidfe, except the king salmon [O. tschaicytscha). 



Head, 4 inches in length; depth, 4J. D. 11. A. 10 (developed rays). Scales, 

 24-125. Mouth, large, the maxillary If in head, being somewhat produced at the top. 

 Vomerine teeth, few, evidently deciduous, only three being present. Eye, 8^ in head; 

 snout, 2|. Pectoral, 2 in head, longest anal ray, 2f . Anal flu high and somewhat fal- 

 cate; ventrals inserted under anterior third of dorsal, reaching about halfway to vent. 

 Adipose fin over ijosterior end of anal. Caudal lunate. 



Color, dark grayish above, sides silvery; a few small, faint, round, black spots on 

 back and on top of head, these sparse and obscure; a few faint spots on base of 

 dorsal, and some on adipose dorsal. Spots on caudal small, but distinct, especially in 

 middle of fin. 



No trace of red at throat in example preserved in formalin and doubtless none in 

 life. The specimen is now a half skin, in good condition. 



The following measurements were taken from the fresh specimen by Dr. Stejneger: 



mm. 



Total length 960 



Total length without caudal 853 



Head 215 



Tip of nose to anterior end of dorsal 400 



Length of base of dorsal 100 



Posterior end of dorsal to anterior end of adipose fin 167 



