740 REPORT OF COMMISSIONER OF FISH AND FISHERIES. 



leugtli of the snout is about equal to the interorbital area. The diameter 

 of the orbit is greater thau tlie length of the operculum. The origin of 

 the dorsal fin is vertical to a point midway between the insertions of the 

 pectorals and the veutrals. The last ray of the anal fin is opposite to 

 the anterior insertion of the adipose fin. 



The greatest height is .21^ of the length without the caudal ; the 

 greatest width of body is .09; the least height of tail is .07f ; the length 

 of the caudal peduncle,* .10 ; the distance from the snout to the dorsal 

 fin is .35i ; the length of the base of dorsal is .23 ; the distance from the 

 snout to the anal fin is .76 ; the distance from snout to veutrals is .51 ; 

 the length of the median rays of caudal is .07^ ; the length of the exter- 

 nal rays of the same is .20. 



Head .21.J of the length without caudal; the distance from the snout 

 to the nape is .15^; the width of the head is .44J of the length of the 

 head ; the width of the interorbital area is .24^ of the same ; the length 

 of the maxillary is .33f ; the length of the mandible is .51; the length 

 of the snout is .25; the length of the operculum is .25.J ; the diameter 

 of the orbit is .27f . 



Br., 9; D., 24; 'a., 3-11 ; C, 8-19-7; P., IG; Y., 10; scales in lateral 

 line, 92 ; transverse rows of scales above lateral line, 8 ; below lateral 

 line 11-4 ; ccecal appendages, 18. 



The height of the bod;s^ is less than in T. montamis ; the length of the 

 head is greater than in T. slgmfer ; the distance from the snout to the 

 dorsal fin is greater than in T. montanus or in T. signifer ; the furcation 

 of caudal is slightly more ; and the adipose fin is larger. 



Tlie head is more compressed than in the two species mentioned; the 

 maxillary is longer ; and the diameter of orbit is greater. 



There are teeth upon the premaxillaries, maxillaries, vomer, pala- 

 tines, mandibles, and pharyngeals. In mature specimens, no teeth are 

 found upon the tongue ; and but rareh' from one to three minute teeth 

 are found in this position in young specimens. 



The scales have less of the regular linear arrangement than is found 

 in T. vulgaris and T. montanus. 



Color : purplish gray, (in young specimens approaching silvery white 

 on sides and belly ;) darkest on back, and verging toward white on belly, 

 with faint tendency to bluish tint. The premaxillary and tip of mandible 

 have a bluish tinge; the same color shows strongly on the white of the 

 inside of the lower jaw. The opercula have bronze-yellow, purplish, and 

 ilusky tints. The sides from the opercula to the middle of body have 

 small, black, irregular spots. In young specimens, the spots continue 

 much farther toward the tail. 



The pectoral fins are light brown, with a yeHowish cast. The outer 

 ray is dark brown ; the inner and inferior margin of the fin pale slate. 



The ventral fin has the distal half of the outerray black ; the proximal 

 portion is lighter ; diagonal lines of rose-color extend across the mem- 



* Measured from the vertical of the posterLor edge of tlae adipose fia to the caudal. 



