1. SALMO. 147 



olive on the sides, whitish on the belly ; a great many spots of a 

 yellow and pallid tint distributed in quincunx form below the lateral 

 line, the pallid spots becoming fewer in number above that line. 

 Length 7 inches 8 lines, of the head 1 inch 7 lines. 



A specimen from Pallas's Collection, in the Berlin Museum, marked 

 S. curiltis ?, does certainly not belong to this species, although it is 

 in so bad a state of preservation as to entirely prevent determination. 



The notes given by Valenciennes do not add anything to our 

 scanty knowledge of this fish. 



19. Salmo Isevig-atus. 



Salmo laevigatus, Pallas, Zoogr. Ross,- As. iii. p. 385 ; Cuv. 8f Vol. xxi. 

 p. 245. 



The typical specimen is in the Berlin Museum ; it is the young of 

 a Charr with very small scales ; but in such a bad state of preserva- 

 tion that, without more specimens, the characters of the species 

 cannot be determined. Pallas describes it thus : — 



" Hr. Merk furnished me with some fine dried specimens from the 

 rivers of the Kurile Islands. More slender and compressed than S. 

 fario or S. curilics, with the head short and similar to that of the 

 latter fish, entirely smooth, with very minute punctiform scales, more 

 numerous than I have seen them in any other species of Trout. Head 

 compressed, with the snout very short, obtuse, the jaws being subequal 

 when the mouth is closed, finely toothed as is also the maxillary bone ; 

 upper jaw somewhat arched. Arch of the palate concave, without 

 teeth. Gill-covers bent upwards, obtusely rounded, silvery. GUI- 

 membrane with twelve rays. Body silvery, without spots, bluish 

 on the back. Lateral line quite straight along the middle of the side, 

 slightly decUning near the head. D. 11. A. 10. P. 13. V. 8. AU 

 the fins of the lower parts appear to have been of a brownish colour. 

 Caudal forked, both lobes obtuse, the lower one being very slightly 

 the broader, of an obscure ferruginous tint from the base, becoming 

 brown at the extremity. Total length 6 inches 10 lines, of the head 

 1 inch 2i lines." 



The following Salmonoids from Kamtschatka were so imperfectly 

 known to Valenciennes from drawings only, that they ought never 

 to have been introduced into the system with specific names : — 



Salmo tapdisma, Cuv. & Val. xxi. p. 364. 

 Salmo arabatsch, Cuv. & Val. xxi. p. 365. 

 Salmo nummifer, Cuv. & Val. xxi. p. 365. 

 Salmo melampterus, Cuv. & Val. xxi. p. 366. 



Salmo erythrorhynchus, Cuv. (fe Val. xxi. p. 366 ; said to be closely 

 allied to, if not identical with, S. alpinus. 



III. Western parts of North America, 



We know of two Charr only occurring in the fresh waters of the 

 Pacific side of North America ; some of the specimens named by G. 



l2 



