464 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 
the third and largest scale of the supraorbital series, extend back- 
ward, nearly parallel with one another, to the occiput, behind which 
point they diverge; the least distance between the center of the 
ridges is contained 1.7 times in the least interorbital width; the 
scales on the occipital ridges are armed with 2 to 5 divergent spinous 
carinae. The median occipital scute bears two long spinous ridges, 
parallel anteriorly, divergent posteriorly. The scute at the origin 
of the lateral line, weaker than in C. maculatus, is armed with a_ 
median spinous keel, and a weaker spinous ridge below. Three 
series of scales occupy the region between the occipital and _ post- 
orbital ridges; these differ from those of C. velifer and especially 
from those of (. maculatus in the fact that the scales of the median 
series are scarcely enlarged. Five series of the scales cover the area 
between the occipital ridges. The outer pair of series and the me- 
dian series are of subequal size, somewhat smaller than the scales 
of the body, and differing from them chiefly in the greater diver- 
gence of their carinae; the scales of the inner pair of series are re- 
duced in size. As in C. velifer, the scales bounding the median ros- 
tral ridge are in a single series, the margins of which rapidly con- 
verge anteriorly, meeting the rostral ridge just behind the terminal 
tubercle; these scales are armed on the outer and posterior portion 
by about six long and slightly divergent carinae bearing suberect 
spinules, but on the inner portion by a few carinae extending 
obliquely inward and backward; the scales of these series are 
rounded, and the. peculiar arrangement of carinae is much less 
strongly developed than in (. velifer. A series of rather small scales, 
continuous with the occipital ridge, becoming irregular above the 
front margin of the orbit, bounds the inner margin of the supra- 
orbital and supranarial series, and abruptly terminates opposite the 
front of the nasal fossa. Between this series and that bound- 
ing the median rostral series there extends a naked groove, which, 
after continuing forward with increased width to the terminal plate, 
abruptly turns back and bounds within the scales along the anterola- 
teral margin of the snout. The remaining portion of the snout above 
is covered with prickles. The scales on the opercles are not reduced 
in size and bear as many as 12 divergent carinae. The scales below 
the orbit, extending from the nasal fossa to the preopercular ridge, 
are small. The underside of the head and the nasal fossa are wholly 
scaleless. 
The short but sharp first dorsal spine is two-thirds as long as the 
terminal tubercle; the filamentous second spine is contained 1.21 
times into the head.t. The base of the first dorsal fin is contained 1.2 
times in the interdorsal space, or 1.4 times in the postorbital length 
1The statement of Radcliffe (p. 136) that the dorsaf spine is “‘ frequently longer than 
head in smaller specimens” is not pertinent, inasmuch as none of those smaller speci- 
mens are true notatus. 
