SALMONOIDEiE. 211 



sorily, I can say nothing respecting any differences that may exist in their viscera. 

 An argument against the identity of the species may be adduced from their habi- 

 tats being upwards of twenty degrees of latitude apart. 



The Lake Huron Herring-Salmon is gregarious like the Bear Lake one, and 

 frequents sandy bays during the summer months. It spawns in April and May, 

 and at that time is occasionally seen in rivers. According to Mr. Todd's obser- 

 vations it is " a timid fish, appears to be in constant rapid motion, and associates 

 in shoals in pursuit of the fry of the small fishes on which it feeds." As an article 

 of diet it is well tasted and wholesome, though much less rich and agreeable than 

 the Attihawmeg. 



DESCRIPTION 

 Drawn up from notes made at Penetanguishene, aided by a re-examination of the dried specimens. 



Colour, in the recent fish, olive-green on the back, silvery on the sides and belly, and 

 blackish-green on the top of the head : the gill-covers, cheeks, and irides are whitish and 

 nacry. 



Scales of the same form with those C. lucidus, but only of two-thirds the size : on the 

 sides their transverse diameter is four lines, their longitudinal one rather more than three, 

 and when in situ, eight are included within a linear inch. There are eighty-four on the 

 lateral line *, and twenty-two in a vertical row under the dorsal, of which nine are above the 

 lateral line, and eight between it and the ventrals. The lateral line is straight. 



Form. — Body compressed, back rounded, belly slightly flattened, the greatest thickness, 

 however, being at the lateral line, which is rather nearer to the back than to the belly : the 

 height of the body, at the dorsal, is double its thickness. Profile like that of C. lucidus, 

 the head being, however, more acute f. The snout is obtuse, when seen in front or from 

 above, and the vertex is smooth and rounded in the recent fish : in the dried specimen the 

 radiated tubular lines near the nape, the sagittal ridge and other eminences, appear as in 

 C. lucidus, but not so prominently. The length of the head is more than one-fourth of the 

 distance between the tip of the snout and end of the scales on the caudal, and somewhat less 

 than one-fifth of the total length, including the lobes of the caudal. In the position of the 

 eye, and the forms of the jaws and opercular bones, this species scarcely differs from C. lucidus. 

 When the mouth is fully open its orifice measures seven lines vertically, and five and a half 

 transversely : the under jaw, which is narrow but not acute, then projects about four lines 

 beyond the articulations of the labials. 



Teeth, none on the jaws, vomer, or palate, but three rows of very slender ones on the 

 tongue may be perceived by the aid of a lens. Rakers stifF, subulate, and rough on the mar- 

 gins, the middle ones of the first arch, which are the largest, measuring five lines. 



* One specimen had only seventy-seven scales on the lateral line, but the same as the above in a vertical row. 

 f The figure, which was taken from a dried specimen, presents a less elegant profile than that of the recent fish. 



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