CLASS PISCES. 423 



Salmo sikus, Cuv., Ascan. pi. xxx. under the name 

 of lavaret ; from the rivers of Norway ; has a pro- 

 minent muzzle like marcena, but the body is narrower, 

 and more brown \ 



Argentina, L., 



Mouth small, and without teeth at the jaws, like 

 Thymallus, but this mouth is depressed horizontally ; 

 the tongue is armed as in the trouts and smelts, with 

 strong hooked teeth, and there is a transverse range 

 of small ones in front of the vomer. There are six 

 rays to the gills ; the intestines differ but little from 

 those of the trouts. 



But a single species is known; from the Medi- 

 terranean ; Argentina sphyrcena, L., Cuv. Mem. du 

 Mus. I. xi. ; whose natatory bladder is very thick, and 

 singularly charged with that argenteous substance so 

 remarkable in fish. It is employed in colouring 

 pearls. The stomach is remarkable for its black 

 colour 2 . 



1 Add Salmo silus, Ascan. xxiv. Coregonus albus, Lesueur, 

 Ac. Sc. Nat. Phil. i. p. 35. Cor. quadrilateralis, Richardson, Voy. 

 of Capt. Franklin, pi. xxv. f. 2. Salmo jieled, Pall. 



2 This fish, which is most certainly the Argentina of Willughb. 

 229, and consequently that of Artedi and Linnasus, has constantly a 

 second adipose dorsal, as Brunnichhas well observed, Icht. Mass. 79 ; 

 it should, therefore, be ranged among the salmones. The Argentina 

 machnata, Forsk., is nothing but the Elops. saurus ; such, too, is 

 probably the case with the Argentina Carolina of Linnasus, though 

 Catesby, in the figure cited, Car. II. xxiv. has forgotten the dorsal. 

 Gronovius, for his argentina, gives an anchovy, and Pennant a 



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