15 



that of the lake trout. In shape the hybrid is similar to the 

 lake trout, as also, in the general pattern of coloration ; but 

 the very numerous spots on the sides are somewhat smaller 

 and a pale lemon in color, instead of whitish. The spots be- 

 low the middle line of the body have a center of orange. The 

 pectorals, ventrals, anal, and the lower lobe of the caudal 

 have a broad white edge. The ventrals and anal are a pale 

 vermilion orange. The outer half of the upper surface of the 

 pectoral is dusky. There is a narrow black line limiting the 

 white of the ventrals and a similar trace bounds the white of 

 the anal. The ground color of the sides is greenish, olive. 

 The sides of the head have numerous spots of lemon-yellow^ 

 some of them larger than the largest of those on the sides. 

 The lips are yellowish, flesh colored ; the eye is golden, with 

 a dusky border; the top of the head and back have some 

 scattered vermiculations like those of the brook trout, but 

 much less developed and not so plentiful. The caudal and 

 dorsals are spotted with lemon-yellow, like the sides. 



A smaller one, supposed to be a male, has the back slightly 

 elevated as in old male brook trout, but its caudal is forked 

 and it has the large scales and peculiar coloration of the 

 hybrid. 



The vomerine teeth are as in the lake trout and the hybrid 

 teeth are in a well developed band. The stomach is very 

 large, siphon-shaped, and the coeca number about 60, being 

 more numerous than in the brook trout, which has 44 ; but 

 not nearly so abundant as in the lake trout. In all characters 

 of great importance, as in the shape of the tail, size of the 

 scales, and the dentition, the cross has received its impression 

 from the lake trout, while in coloration, general form, and 

 number of coecal appendages the impression came from 

 the brook trout. In other words, in characters most subject 

 to vz.x\?X\Qx\, fontinalis has left its impress, but in characters 

 of greater permanence namaycush has left its unmistakable 

 mark. The specimen was an undeveloped male about 20 

 inches Ions:. 



