94 SALMONID^. 



The greatest dc})th of the body is below the origin of the dorsal 

 fin, and is little less than one-fourth of the total length (without 

 caudal) ; the length of the head is almost two-sevenths of the 

 same. 



The snout is much produced, pointed, and one-third the length of 

 the head, or about five-sixths of the maxillary bone; the lower jaw 

 has a terminal hook one-fourth of an inch in height, and the contact 

 of the jaws laterally is internipted. The maxillaiy bone exceeds 

 the length of the snout by two-thirds of the diameter of the eye, it 

 extends far beyond the hinder margin of the orbit, and its greatest 

 width is equal to nearly two-thirds of the diameter of the eye. 



Teeth strong, those of the intermaxillary and mandible larger than 

 those of the maxillary and palatine bones. The vomerine teeth ex- 

 tend far back on the palate, and are arranged in a double series, the 

 teeth of each pair being generally placed side by side. 



The interorbital space is convex, about half the length of the 

 postorbital part of the head, or two-thii'ds that of the maxillary 

 bone. The eye is situated somewhat below the upper profile of the 

 head. 



The proeoperculum has the hinder margin rounded, the lower limb 

 being very indistinct and extremely short ; the hinder margin of the 

 opercidum is also rounded ; its pomt of junction with the inferior limb 

 is a right angle. The snboperculum is broad, about half as broad as 

 long. The distance from the upper end of the gill-opening to the 

 angle of the operculum is greater than that from the latter point to 

 the lower anterior end of the subopcrculum. 



The distance of the origin of the dorsal fin from the occiput, if 

 measured back from behind that fin, reaches considerably more than 

 haKway between the adipose and the root of the caudal. The dorsal 

 fin is higher than long, and consists of thirteen rays, of which the 

 first and second are rudimentary, the third simple and shorter than 

 the follo-n-ing one, which is branched and the longest of the fin ; the 

 final ray is cleft throughout. 



The anal fin is higher than long, and consists of twelve rays, the 

 fii'st two being rudimentary, the third simple, and the fourth branched 

 and the longest of the fin ; the last ray is cleft to its base. 



The pectoral fin is shorter than the postorbital part of the head, 

 and does not reach halfway towards the root of the ventral. The 

 ventral fin is shorter, and reaches more than halfway towards the 

 vent ; its outermost ray is vertically opposite the ninth of the dorsal. 

 Posterior margin of the caudal truncate. 



There are 128 transverse series of scales, counted immediately 

 above the lateral line ; the series descending obliquely backwards 

 from the oingin of the dorsal fin to the lateral line has thirty scales ; 

 that from behind the adipose forwards to the lateral line has fifteen 

 scales ; there are about 24 longitudinal series between the lateral 

 line and the ventral fin. The skin is very thick, enveloping com- 

 pletely the scales on the back and on the belly. 



Vpper parts dark greenish brown ; sides lighter ; lower parts 

 whitish, with large blackish patches ; sides of the head and body with 



