402 



BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



The body contours are less strongly curved than in the two pre- 

 ceding species, G. denticulatus and G. magniftlis ; the greatest depth, 

 below the origin of the first dorsal, does not equal the length of 

 the head to the margin of the preopercle at its angle as it does in 

 those species, but is about equal to the distance from the tip of the 

 snout to the preopercular ridge at its angle. The greatest width of 

 the body across the bases of the pectoral fins is contained 2.35 times 

 in the length of the head, and is more than half the greatest depth ; 

 the greatest width of the head is a little less than the length of the 

 snout plus that of the orbit. The head is about as cavernous as in 

 G. magnifilis ; not so firm as in G. colletti or G. denticulatus, but 

 firmer than in G. multiftlls. The angle of the snout at the tip of 



Fig. 5. — Gadomus intuonigbu. Type. 



the premaxillary spines is quite obtuse. The horizontal length of 

 the orbit, greater than the vertical, is contained 4.7 (to 4.5 ) 1 times 

 in the length of the head, and 1.25 (to 1.15) 1 times in the length of 

 the snout. The interorbital is almost as wide as the orbit, and about 

 twice as wide as the suborbital. The upper jaw, which is contained 

 1.8 (to 1.7) * times in the head, extends well beyond the eye. The 

 teeth, like those of G. multiftlis, as distinguished from those of G. 

 denticulatus, though minute, are of sufficient size to be readily 

 differentiated from one another without a lens. The bands of teeth, 

 occurring on the jaws only, are rather narrow and are not strongly 

 convex in cross section. The teeth forming the bands are aligned 

 in a single series separated by narrow toothless streaks. The great- 

 est width of the premaxillary band is contained 2.4 (2.2 to 3.0) 

 times in the least width of the suborbital. The mental barbel is 

 long and slender, but of extreme variability, its length ranging from 



1 In para types more than 100 mm. long to anus. 



