402 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 
The body contours are less strongly curved than in the two pre- 
ceding species, @. denticulatus and G. magnifilis; 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@. multifilis. The angle of the snout at the tip of 
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Fig. 5.—GADOMUS INTRONIGHR. TYPE. 
the premaxillary spines is quite obtuse. The horizontal length of 
the orbit, greater than the vertical, is contained 4.7 (to 4.5)* 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. multifilis, as distinguished from those of @. 
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 bends are aligned 
in a single series separated by narrow toollles st. aks. The great- 
est width of the premaxillary band-is contained 2.4 (2.2 f6 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 
1JIn paratypes more than 100 mm. long to anus, 
