SALMO SPECTABILIS. 301 



no rigid comparison has been made between it and the S. spectabilis of Heckel 

 and Kner, we adopt the Austrian nomenclature (Fig-. 15-3). 



The fish has a somewhat fusiform shape of body, with the snout pointed, 

 and the head longer than the body is high, though the difference is not great, 

 the fish being over five times as long as high, and four and three-quarter times 

 as long as the head. The eye is small, twice its diameter from the snout, 

 nearly four times its diameter from the hinder edge of the operculum, and 

 more than twice its diameter from the other eye. The mouth is of moderate 

 size, with the jaws equal, and the maxillary bone extending behind the eye. 

 The teeth of the jaws are of uniform size, and similar to those of the palate, 

 though the teeth of the maxillary bone, as usual, become smaller and thicker 

 behind. -The body of the vomer has a double row of rather larger teeth, 

 the points of which diverge in a somewhat zig-zag line. The head of the 

 vomer has a simple transverse row of small teeth. The tongue is armed with 

 three or four strong teeth on each side. 



The pre-operculum and operculum are rounded. The latter is directed 

 backward. The number of gill-rays is eleven on the left, and ten on the right 

 side. The dorsal and ventral profiles in the anterior part of the body are 

 similar. The rays of the fins are rather short. The scales are somewhat 

 large ; they are less embedded in the skin than usual. Valenciennes mentions 

 one hundred and thirty longitudinal series, and Heckel and Kner found one 

 hundred and twenty on the lateral line. The pyloric appendages are long, 

 particularly those of the crown ; but the male and female differ in the 

 width of stomach and length of intestine, which are larger and longer in 

 the male. 



The colour of the back is steel-blue ; the sides towards the belly become 

 silvery; the opereulum has large, round/ black spots, which are also seen on 

 the dorsal fin and sides, where they frequently take on an X-shape. The 

 other fins are unspotted as a rule, though specimens are sometimes found with 

 spots on the adipose fin and upper caudal lobe, when the black pigment is 

 unusually developed on the sides of the head and body. The size of this fish 

 varies from about one foot nine inches to two feet six. 



Salmo marsiglii (HECKEL). The Salmon Trout of 



Austria. 



D. 13, A. 11. Scales: lat. line 120. 



This Salmon Trout (Fig. 154) is found only in the mountain lakes of Aus- 

 tria, such as the Traun See and Atter See, and, according to Von Siebold, in the 

 Chiem See, in Bavaria. Heckel and Kner also say it occurs in Lake Constance . 



