140 SALMONIDJi:. 



12. Salmo hucho. 



Hucben ; Rothfisch. 



Huch, Gesner, Be Aquat. p. 1075 ; Aldrcw. p. 572 ; Willughby, p. 199, 



tab. 1. fig. 6. 

 Salmo no. G, Artedi, Genera, p. 12 ; and no. 8, Synon. p. 25. 

 Marsil. Danub. Pan.-Mys. iv. taf. 28. f. 1. 

 Salmo hucho, L. Syst. Nat. i. p. 510 ; Bl. Fische Dewtschl. iii. p. 152, 



taf. 100 ; Meiding. Pise. Amtr. tab. 15 ; Agassiz, Poiss. d'eau douce, 



pis. 12 & 18 ; Cilv. ^ Val. xxi. p. 22G ; Heck. ^ Kner, Siisswasserf. 



p. 277 ; Siebold, Siisswasserf. p. 288. 

 Hucho gemianorum, m. 



D.13. A. 12. P. 17. V.9-10. L. lat. 180. Vert. 68. 

 Caec. pyl. ca. 200. 



No median series of teeth along the hyoid hone. Head and body 

 elongate, low, the depth of the body being about one-sixth of the 

 total length (without caudal) ; the length of the head about one- 

 fourth. Head flat above, snout depressed and rather produced. The 

 teeth on the palate are as strong as, or even stronger than, those of 

 the mandible. Praeoperculum with the lower limb very distinct. 

 Fins of moderate size ; caudal deeply emarginate. Sides silvery, with 

 numerous very small black dots, extending on the head and dorsal 

 fins ; old specimens with a reddish hue. 



Danube. 



a-b,c. Half-grown. Danube. 



d. Half-grown : skeleton. From Prof. Agassiz's Collection. 



13. Salmo iossos. 



Salmo hucho, Pallas, Zoogr. Rosso-As. iii. p. 344 (not synon). 

 Lossos (Pussia) ; Streshnewoi Linn (river Kama), or Krasnaja ryba. 



B. 11. D.ll. A. 10-11. P. 12. V.9. Cffic. pyl. 24 and more. 



Pallas gives the following description : — 



Body commonly about two feet long, thick, compressed, convex on 

 either side ; back in front of the dorsal fin subangular. Head conical, 

 scarcely compressed, with the snout obtuse ; jaws subequal, the lower 

 a little the longer when the mouth is open. Teeth pointed, recurved, 

 distant from each other along the margin of either jaw, those of the 

 lower jaw the longest; similar teeth on each side of the tongue, 

 unequal in number ; somewhat smaller ones anteriorly on each side 

 of the palate. Opercles entire, rounded, flexible. Caudal sym- 

 metrical, emarginate, with the angles acute. Body with small scales, 

 somewhat silvery, with spots scattered here and there on the scales or 

 their interstices ; belly white, without spots. Head with brownish 

 blotches. Total length (of a specimen from the Kama) 2 feet 6 

 inches ; of the head 6 inches 5| lines ; distance from the apex of the 

 snout to the dorsal fin 12 inches 7 lines, to the ventrals 1 foot 8 inches 

 1 line, to the anal 1 foot 9 inches, to the adipose 1 foot 10 inches 

 4| lines, to the caudal 2 feet 3 inches 4 lines ; from the snout to the 

 eyes 1 inch 10 lines ; length of appendages to the ventral fins 9 lines. 



Very frequent in the rivers flowing into the Baltic sea, and a most 



