492 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 
hynchus and C. acantholepis, in which but 45 series occupy the space 
between origin of second dorsal and lateral line, the different count 
being due to the course of the lateral line, which in those two species 
rises on the trunk to the next horizontal scale row above the one it 
occupies on the tail. The carinae, numbering 7 to 10 on each scale of 
the body, are low, divergent ridges, bearing comparatively very weak 
spinules. The dorsoterminal plate is not prominent and is armed 
by about 8 rows of spinules; there follows, .on the ethmoid portion 
of the infraorbital ridge, 7 scales on one side, 6 on the other; then 
9 (8) greatly strengthened scales with one or a few rows of spinules 
on the preorbital portion (in a single series); 6 (5) scales, still in 
a single series, cover the suborbital region of the ridge, and it is only 
upon the preopercular portion that the scales are in two series; 
the ridge ends in a sharp point located in front of preopercular 
margin a distance contained 4.7 (6.0 on right side) times in postor- 
bital. The area between the orbit and the infraorbital ridge is 
scaled; the portion below the anterior half of orbit with small scales 
bearing only a few spinules; the portion below posterior half of 
orbit and extending backward to the preopercular ridge, with scales 
small but much better developed than in the preceding two species; 
each one bears 2 to 6 divergent spinous carinae. Nine subquadrate 
scales, with several carinae directed outward and backward, cover the 
superior rostral ridge; these scales are bounded by a single series of 
scales with numerous carinae, outward from which a narrow groove 
runs forward to the naked anterolateral region of snout, as in C. 
acantholepis. The scales on the occipital ridge are rather weaker 
than in (. platorhynchus, but are otherwise similar; most of them 
bear a single spinous keel; the postorbital and the posterior half of 
the supraorbital ridges are covered by scales quite similar to those 
on the occipital ridges. All of the spinules of the occipital scute but 
one are arranged along the median keel. The scales between the 
occipital ridges are armed by three to seven carinae, and are arranged 
in about five rows. The scales between occipital and postorbital 
ridges bear numerous carinae; these scales are enlarged in a median 
series; the scales on the exposed part of opercular bones and on the 
cheek behind the eye are similar to those on the body. The nasal 
fossa and the underside of the head are completely naked. 
Length of first dorsal base, contained 1.2 times in the interdorsal 
space and 1.6 times in the postorbital length of head. The first 
dorsal spine is short, the second almost as long as the postrostral 
length of head (contained 1.7 times in head); length of pectoral, 
1.9 in head; inner ventral rays, 3.6. 
Color, brownish, much lighter than in C. platorhynchus and C. 
acantholepis; under side of head light brown (instead of blackish), 
the rami of mandibles, and the gular and branchiostegal membranes, 
