« 394 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 
The general outlines of the body and head agree closely with 
those of other species. The greatest depth of body is equal to the 
distance from the tip of the snout to the angle of the preopercle; 
the greatest width, over the pectoral bases, is contained 2.3 times in 
the head and about twice in the depth of the body. 
The head is rather firmer and less cavernous than in such species 
as G. multifilis, G. introniger, and G. longifilis; the greatest width 
of the head is about equal to the length of the snout plus the eye. 
The orbit is nearly round; its length is contained 1.15 (to 1.05)? 
times in length of snout, 4.3 (to 4.2) times in length of head. The 
interorbital is narrow and flat, with clearly concave sides; its least 
width is contained 1.7 (1.5 to 1.8)? times in the greatest orbital 
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Fic. 3.—GADOMUS DENTICULATUS. TYPE. 
length, and is about one-half as great as the length of the snout. 
The least width of the bony suborbital is about two-thirds that of 
the interorbital. The two limbs of the opercle do not end in spines; 
the lower margin of the interopercle is arched upward a little before 
its evenly rounded angle. The mouth, as in the other species, is 
large and moderately oblique; the upper jaw, the length of which 
is contained 1.85 (1.8 to 1.9)! times in the length of the head, ex- 
tends but slightly beyond the vertical passing through the posterior 
margin of the orbit. The teeth are so excessively fine and crowded 
that they can not be individually distinguished by the unaided eye; 
they form an even surface on the two jaws, as also in G. colletit, 
the Japanese representative of G. denticulatus, and in G. arcuatus, 
an Atlantic species; the bands of teeth are strongly convex in 
cross section, the mandibular band being only one-third as wide as 
1These measurements are of the three paratypes more than 100 mm. long to anus. 
Measurements of smaller specimens are given in the following table. 
