FISHES-HETEROLEPIDAE-CHIROPSIS NEBULOSUS. 
45 
quite small, and, as usual, fringed. The base of the first dorsal is a little longer than that of 
the second, which is nearly equal to the base of the anal. The first dorsal is more elevated ante¬ 
riorly than in 0. pictus. The posterior extremity of the pectoral fins does not extend quite a far 
back as the tips of the ventrals, which approximate the vent, without, however, reaching it. 
Br. VI: VI; D XXI, 25 ; A 24 ; C 5, 1, 7, 6, 1, 6 ; V I, 5 ; P 19. 
The scales are somewhat larger than in C. pictus, but similar in shape and structure. There 
are also five lateral lines, the uppermost of which running nearer the dorsal line than in 
C. pictus. The point of divergence of the fifth of these lines begins nearly midway between 
the origin of the ventrals and the vent. The curve is also more open. The scales covering the 
opercular apparatus are larger than in C. pictus. The base of the caudal, pectorals, and 
dorsals exhibit small scales, as in the foregoing species. 
The ground color is olivaceous ; the sides and upper part of the head are clouded with dusky 
brown or red. The upper region of the body exhibits crowded, small, blackish spots, extending 
likewise over the head. The dorsal, caudal, and pectorals are clouded with brown, the anal 
and ventrals being blackish. The inferior region of the head and belly is unicolor, and of a 
lighter hue than the back. 
References to the figures .—Plate XX, fig. 5 represents Chiropsis guttatus, somewhat reduced 
in size. Fig. 6 is a scale from the dorsal region. Fig. 7, a scale from the middle lateral line. 
Fig. 8, a scale from the sides of the body. 
List of specimens. 
8 
& 
a 
gn 
i, 
g 
■g 
p 
)er oJ 
mens 
Locality. 
'o 
Whence obtained. 
Nature of specimens. 
Collected by— 
3 
s 
c3 
O 
il 
& 
269 
3 
San Francisco, Cal__ 
1853 
Lt. Williamson__ 
Alcoholic_ 
Dr. Heermann _ 
270 
1 
Presidio, Cal.___ _ 
1853 
Lt. Trowbridge___ _ _ 
Lt. Trowbridge 
271 
1 
Astoria, Oregon_ . - 
1853 
.do. 
4. CHIROPSIS NEBULOSUS, Grd. 
Spec. Char. —Dorsal fins contiguous. Caudal posteriorly sub-concave. Lower portion of cheeks and opercular apparatus 
scaleless. Base of anal longer than soft dorsal. Upper region black ; inferior region olivaceous. 
This species has the general appearance of G. constellatus , though a good deal more elongated. 
The greatest depth is equal to the length of the head, which is contained four times and a half 
in the total length, in which the caudal enters seven times and a half. The lower half of the 
cheeks and opercular apparatus is scaleless. The eye is of moderate development, sub-elliptical 
in shape, its horizontal diameter being contained five times in the length of the side of the 
head. The supraocular flap is very slender and fimbriated. The spinous portion of the 
dorsal fin is a good deal longer than the soft portion. The latter is also shorter than the anal, 
the origin of which is situated in advance of the junction of the two dorsals. The pectorals are 
very broad ; their extremities do not extend quite as far back as the tips of the ventrals, which 
remain at a considerable distance from the vent. 
Br. VII: VIII; D XXV, 19; A 25 ; C 6, 1, 7 6, 1, 5 ; V I, 5 ; P 19. 
