440 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 
series and the front of the second dorsal. The scales are rather 
thin, and are thickly beset with short slender spinules, which are 
directed outward and backward, and are arranged in definite quin- 
cunx order, except on and near the head, where they fall into 
very widely divergent rows. The scales of the head bear weak 
spinules, which are smaller than those of C. argentatus; those on 
the ridges of the head are little strengthened. Instead of being 
followed by a single median scute, as in C. argentatus, the occipi- 
tal scute is preceded on each side by a similar scale. The squa- 
mation of the head is more complete than in (. argentatus: the 
anterolateral region of the snout is largely scaled, leaving only a 
narrow scaleless groove adjoining the series of scales which bounds 
the median rostral series on each side; the under surface of the head 
is wholly scaled, including the rami of the mandibles, and exclud- 
ing only the lips and the gular and branchiostegal membranes. 
In other respects the squamation of the head is the same as in 
C. argentatus. 
The length of the first dorsal base is contained 1.2 (0.75 to 1.3) 
times in the interdorsal space, 1.8 (1.5 to 1.9) times in the postorbital. 
The anterior rays of the second dorsal fin are very short. The origin 
of the anal is slightly behind (or slightly before) the vertical from 
the origin of the second dorsal. Length of fin-rays in the head 
(in paratypes): second dorsal spine, 2.1; pectoral fin, 2.4 to 2.65; 
outer ventral ray, 3.0 (3.2 in type), sometimes reaching anus; inner 
ventral rays, 3.75 to 4.2. 
Coloration in alcohol—The dark markings of the body consist 
anteriorly of weakly ocellated dorsal saddles, and posteriorly of 
dark bars; a dark blotch is located on the lateral line below the first 
dorsal. The sides of the body and head are silvery, but there is a 
dark blotch on the opercles. The gular membrane is punctulate, 
with but traces of the cross striae or black ridges characteristic of 
this region in (. argentatus; the branchiostegal membrane is black 
ventrally, and blackish or dusky laterally. The skin over the pec- 
toral girdle is mostly silvery, but becomes abruptly dark brown over 
the anterior face of the girdle before the pectoral fin. The buccal 
cavity is lined with whitish; the walls of the branchial cavity are 
dusky (except over the hyoid arches, where they are whitish), be- 
coming blackish posteriorly, but with an abrupt whitish margin 
along the edge of the opercular and branchiostegal membranes. The 
parietal peritoneum is brownish black, underlain with silvery; it is 
sometimes whitish over the posterior portion of that organ which 
lies in the body wall before the anus. This organ is superficially 
covered by a black streak, with an anterior dilation between the 
ventral fins and the isthmus and a posterior dilation in front of the 
anus. From each side of these dilations a diffused darker area 
