salmoniDjE. 401 



" The following is a description drawn up from notes made at Pene- 

 tanguishcne, aided by a re-examination of the dried specimens : 



" Color, in the recent fish, olive green on the backj 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. Lwcidus, 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 late- 

 ral 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. Luddut, 

 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. Im- 

 cidus, 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 G. Lucidws. 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 

 Blender ones on the tongue may be perceived by the aid of a lens. 

 Rakers stiff, subulate, and rough on the margins, the middle ones of 

 the first arch, which are the largest, measuring five lines. 



* One Bpecimen had only seventy-seven scales on the lateral line, but the same aa 

 the above in a vertical row. 



t The figure, which was taken from a dried specimen, presents a loss elegant pro- 

 file than that of the recent fish. 



