PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 05 



ininal at about ^ of the depth of the caudal peduncle from the caudal 

 fin. Caudal slightly and regularly convex ou its posterior margin, its 

 rays thrice bifurcate. Pectoral of colored side narrow ; the rays, ex- 

 cept the first two, bifurcate ; its length equal to the distance of the lower 

 eye from the tip of the operculum, or about -^ of the total length ; the 

 fifth ray longest. Pectoral of blind side about ^ of the length of that 

 of colored side, its rays once bifurcate, the first four excepted. Ventrals 

 about lialf the length of the pectoral of the colored side ; their posterior 

 axil vertical with the anterior angle of the pectorals, and their four pos- 

 terior rays bifurcate. Lateral line very gently curved above the pec- 

 toral, and contained 83 pores in specimens 10 inches long. Accessory 

 lateral line variable in length, ending from the 30th to the 59th dorsal 

 ray in different individuals, usually about equally developed on the 

 blind side. Scales rather small, cycloid, subcircular; those of the ante- 

 rior portion of the body not indnicated, but entirely surrounded by skin; 

 those of the posterior part imbricated. Scales of the abdominal region 

 smaller than those on the rest of the body ; those upon the head narrow, 

 much elongate, separate. Scales of the blind side similar in character 

 to those ou the colored side ; those on the head like those on colored 

 side of head. Snout, interocidar space, and lower jaw scaleless. Dor- 

 sal and anal with three rows of small, narrow, elongate scales along 

 each ray of their central portion, a few upon the blind side of those fins. 

 Caudal covered with scales simdar to those of the other vertical fins, 

 but covering both rays and membrane on both sides of the body. Color 

 of the eyed side dark olive-green, deepening almost to black on expo- 

 sure to the air, and often blotched with whitish. Each of the body- 

 scales tipped with black. Blind side opaque- white; a margin of yellow 

 around the head from origin of dorsal to anus. 



Total length, in inches 



Total length without caudal 



Greatest depth of body 



Length of head 



Longitudinal diameter of eye 



Width of interocular space 



Length of snout 



Length of pectoral, colored side 



Length of pectoral, blind sido 



Length of ventrals 



Length of longest ray of dorsal 



Distance in a straight line from tip of lower jaw to 



origin of anal ". 



Distance from tip to tip of longest rays of dorsal 



and anal 



Length of lower jaw 



Widtli of peduncle of tail, narrowest part 



Greatest distance from anal to straight part of 



lateral lino 



Xo. 1. I X^o. 2. Xo. 3. 



Si 

 416- 



12J 



Si's 



131 



10 



45S 



23'i 



fs 



is 

 lis 

 5 



1 



25 



2/8 



