1 18 



T. KITA! I A RA. 



4- 



3- 



2. 



I. 



Oncorhynchns masou Brf.VOORT. 

 {=Onc. yessocnsis HlLGENDORF.) 



,, keta Walbaum. 



{ — One. haberi HlLGENDORF.) 



kisutch Walbaum. 

 { = Onc. perryi HlLGENDORF.) 

 „ nerica Walbaum. 



5. Salmo perryi BrEVOORT. 



(=S. macrostoma GÜNTHER.) 



6. Hiicho blakistoni H ILGENDORF. 



7. Salvelinns kundsha Pallas. 



(= Salmo leucomaenis PALLAS.) 



8. „ plnvius Hilgendorf. 



9. „ malma WalbaÜM. 



We have thus derived a far-going knowledge about the salmon 

 and trout of the North Pacific. However I regret that, so far as Japan- 

 ese species are concerned, there seem to be still several doubtful points 

 in identification which are worthy of notice. 



Unfortunately, Brevoort's descriptions are but rough notes 

 taken from very poor plates ; they are liable to lead one often 

 into serious mistakes unless they be critically examined and recourse be 

 taken to going beyond the figures and descriptions. What he calls 

 Salmo perryi seems to be, in fact, identical with Salmo blakistoni of 

 Hilgendorf. For, the large paired fins, the forked caudal and the nu- 

 merous black spots on cheek and body indicate no other salmon than 

 the species just mentioned. Moreover, the fact that the specimen he 

 had measured 33 inches in length sufficiently indicates that it could not 

 have been 6". macrostoma of Günther ; since this never grow so large, 

 while, on the other hand, .SI blakistoni may be nearly 50 inches long. 



" Salmo orientalis or mason of BREVOORT offers much difficulty in 

 identification.' Dr. Jordan considers it to be the same as One. yes- 

 socnsis HlLG. and to be very much like the hump-back salmon {One. 



