2. ONCOEHTNCHUS. 



159 



ing far beyond the orbit" in old males. [Males during the spawning- 

 time haye the intermaxillary much produced, strongly bent down- 

 wards beyond the mandible, and armed with strong teeth. The 

 mandible is extremely long, terminating in a knob which bears a 

 cluster of very strong teeth on each side. The snoul of these males 

 is so long that the eye occupies the middle of the length of the 

 head.] Vomerine teeth persistent, forming a series which is double, 

 at least anteriorly. The appendage in the axil of the ventral fin is 

 more than half as long as the fin. Caudal fin emarginate, the length 

 of the middle rays being contained once and three-fourths in that of 

 the outer ones. There are about eighteen scales ii\ « series obliqueiy 

 descending forwards from the axil of the adipose fin to the lateral 

 line. Caudal fin with small brown spots. 



These characters are taken from the typical specimen, the skin of 

 a male fish from Observatory Inlet : a second specimen, marked 

 "75. Salmo japonensis/' is in Pallas's Collection; but it is evident 

 that this cannot be the type of S. japonensis, Pall., which is described 

 as having squamce mediocres, whilst S. scouleri is distinguished by its 

 very small scales. 



6. Oucorhynchus orientaHs. 



Salmo orientalis, Pallas, Zoogr. Ross.- As. iii. p. 367 ; Cuv. 8f Vol. xxi. 

 p. 356. 



B. 15. D.14. A. 19. L.lat. 145. L. transv. 33/43. 



Form of the body as in Salmo trntta. Praeoperculum perfectly 



