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 G. velifer and especially 

 from those of C. mctculatus 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 ('. 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 C . 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. 1 The base of the first dorsal fin is contained 1.2 

 times in the interdorsal space, or 1.4 times in the postorbital length 



1 The statement of Radeliffe (p. 130) that the dorsal spine is "frequently longer than 

 head in smaller specimens " is not pertinent, inasmuch as none of those smaller speci- 

 mens are true notatus. 



