124 SALMONID.E. 



51. Salmo siscowet. 



Fario erythrogaster, Cuv. >^- Val. xxi. p. 308 (not Dekay). 

 Salmo siscowet, Agass, Lake Super, p. 333, pi. 1. fig. 3. 



B. 12. D. 13-14. A. 12-13. L. lat. 200. 



Similar in habit to S. umhla ; head of moderate size, one-fourth 

 or rather less than one-fourth of the total length (withoiit caudal) ; 

 pi-8Goperculum very short, without lower limb ; suboperculum broad ; 

 the posterior point of junction of oporcidum and suboperculum is 

 nearer to the lower anterior angle of the suboperculum than to the 

 upper end of the gill-opening. Maxillary strong, narrow, extend- 

 ing a little behind the hind margin of the orbit in a specimen 16 

 inches long. Jaws equal in length. Teeth rather strong ; those on 

 the vomer form a short series, double anteriorly and simple pos- 

 teriorly. Fins rather small ; caudal deeply forked, the outer rays 

 not being quite thrice as long as the inner ones. Greenish on the 

 back, reddish on the sides, shining silvery, with numerous small 

 round reddish-white spots ; dorsal fin obscurely spotted. 



Great Lakes of North America — non-migratory. 



a. Skin 16 inches long. Lake Ontario, eight miles below the falls 



of Niagara. From Dr. Parnell's Collection. 

 ? 6, Dried head of a large specimen. Collected by Captain Back. 



The description of a Salmo symmetrica from the river Winni- 

 pisseogee in New Hampshire (JPrescott, Amer. Joum. 1851, xi, 

 p. 340) is drawn' up by an author who has taken Dekay as his 

 guide ; it is therefore perfectly valueless. 



XVI. Salmonoids from Greenland, mentioned hi/ Fahricius. 



Fahricius, Faun. Gronl. p. 170, et seq. mentions several Sal- 

 monoids belonging to the genus Salmo ; but without a reexami- 

 nation of Greenland specimens it is impossible to recognize the 

 characters of these species, a difficulty already experienced by 

 Sir J. Eichardson, Faun. Bor.-Amer. iii. p. 178. Fahricius men- 

 tions : — 



1. Salmo salar, very rare, and not seen by Fahricius. 



2. Salmo carpio, a migratory Trout, which, of course, is not the 

 (S. carpio, L. 



3. Salmo alpinus, also a migratory Trout, probably specifically 

 different from the preceding. 



4. Salmo stagnalis, a Charr, very probably identical with S. alipes, 

 Bichards. 



5. Salmo rivcdis, probably a compound of the young of various 

 species. 



Finally, Storer describes, in a very superficial manner, a Salmonoid 

 from Labrador. No mention is made of the arrangement of the 

 vomerine teeth ; so that only the coloration induces us to place it in 

 this division, and not among the Charrs : — 



