80 



PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



sal. Caudal witli an undulating posterior margin, the central rays and 

 outer rays somewhat produced; all the principal rays three or more 

 times bifurcate. The longest dorsal rays are about the 30th-38th; the 

 longest anal rays about the 15th-23d. Pectoral of the colored side 

 about half the length of the head, and contained in the total length be- 

 tween nine and ten times 5 its rays once or twice bifurcate, the first two 

 excepted ; the third ray longest, the twelfth about half its length ; pec- 

 toral of the blind side considerably shorter than that of colored side; its 

 rays simple or some of them once bifurcate. Ventrals inserted more 

 than the width of the base of the pectoral in front of that fin, their tips 

 reaching nearly to the fourth anal ray; their length about half, or a little 

 more than half, that of the pectoral of the colored side; the four poste- 

 rior rays once bifurcate. Scales of body small, very finely ciliate on 

 their free margin, covering the whole of the body and the head to the 

 middle of the length of the interorbital space, and extending up the 

 dorsal and anal rays nearly to their tips. Some on the broad end of the 

 maxillary. Along the free margin of each of the principal scales is 

 ranged a variable number of much elongated, narrow, accessory scales, 

 easily rubbed off. Numerous similar supernumerary scales on the dor- 

 sal and anal rays. Scales of blind side smaller than those of colored 

 side, smooth, with accessory scales as on colored side. Caudal covered 

 with scales on both blind and colored sides ; some in front of the central 

 rays of dorsal and anal on blind side. Lateral line, in small individuals, 

 containing about 100 scales between its origin and that of the caudal, 

 and raised above the pectoral into a bold arch of a diameter exceeding 

 the length of the pectoral, and a height about equal to the length of the 

 ventral. Color dark reddish brown to slaty gray above, whitish below ; 

 usually five small light bluish spots along the dorsal region, and four 

 along the abdominal. In large individuals, the spots are obsolescent or 

 wanting. 



Dimensiona. 



Total length, in inches 



Length ■without caudal 



Greatest depth of body 



Length of head 



Greatest distance of anal to straight part of lateral line. 



Tip of lower jaw to origin of anal 



Longitudinal diameter of eye 



Interocular widtli 



Length of snout from upper eye 



Length of lower jaw 



Length of pectoral of colored side 



Length of pectoral of blind side 



Length of ventrals 



Length of arch of lateral line 



Eise of arch of lateral line 



Width of caudai peduncle 



Longest dorsal ray 



Longest anal ray 



No. 1. No. 2. No. 3. No. 4. No. 5. 



1 



if 

 i 

 It 



9§ 



m 



2i 



15 



IB 



I 



9i 



4 



24 



1 6 



21/» 



m 



4/b 



5i 



1 



2i 

 2i 



1ft 



3 



1 



