3170 Bulletin United States National Museum. 
Seales of moderate size, thin, not embedded, minutely ciliated; lateral 
lines 2, the iii)per near base of dorsal, ceasing under origin of posterior (iftli 
of soft dorsal, the lower line beginning slightly in front of the end of the 
upper line, running along middle of caudal jieduncle ; the tubes very short, 
borne on much smaller intercalated scales, and not forming a continuous 
line; head largely scaled, the snout and jaws naked; gill-uienibranes 
united anteriorly, forming a narrow free fold across the isthmus; braneh- 
iostegals 7; pseudobranchia- well developed; a wide slit behind last 
gill-arch; gill-rakers short, broadly triangular, strongly toothed. Upjier 
margin of opercle, above its angle, wholly attached liy niembranee to the 
shoulder girdle, as in the liiiplicina'. Mouth large, ])rotractile, the lower 
jaw i)rotrnding, the maxillary broadly exj)osed, with a narrow supple- 
mental bone along its upper edge. Teeth all villiform, in broad bands on 
jaws, vomer and jialatines, the inner teeth on jaws slightly longer than 
the others and depressible. Tongue smooth. Large mucous i»ores on under 
side of mandible, and slit-like pores ]»resent on edge of preorbital and 
around front of eye. Anterior nostril near edge of jneorbital, j)rovided 
with a short tube; i)osterior nostril without tube or raised rim, immedi- 
ately ill front of eye; a short free triangular Hap on upper edge of each 
orbit. U]iper portion of preopercle \i ith a single strong jilectroid sjiine, 
directed backward and downward; bones of the head otherwise unarmed, 
the preorbital and preopercle with entire edges, theoiiercle without spines 
or ridges, ^'entrals small and anterior in jiosition, as in the UijpUcino , 
consisting each of one strong spine, and live branched rays, their base 
being in front of base of pectorals ; no enlarged scale behind base of ven- 
trals; vertical lins low, with rounded lobes, their bas.il portions well- 
scaled; dor.sal with 7 low strong spines and 22 )»rofusely branched rays; 
anal with 3 spines and 18 rays. One species, ai>parently the type of a dis- 
tinct subfamily, Ithegmatimv. 
fracture; referring to the interrupted lateral line.) 
Kil.j (11.) IdlKtOIA THAI MASH M. Gilbert, new species. 
Head 2’ in length ; depthS; eyeuiuhead; D. ^T1, 22; A. Ill, 18. Scales 
45 in a longitudinal series along middle of side, llody elongate, moder- 
ately comjiressed, with very short, deep, caudal peduncle; anterior j»ro- 
lile strongly arched, slightly depressed above orbits; interorbital space 
very narrow, convex, its width two-thirds diameter of orbit. Mouth 
large, slightly oblique; lower jaw the longer, its tip entering the profile. 
Dorsal spines low, strong, increasing backward, the last sjiine a trilie 
longer than diameter of orbit; anal spines short and strong, the middle 
spine longest. Lateral line curved strongly uiiward from its origin to 
below third dorsal spine, thence vnnning parallel with the liack to below 
middle of second dorsal, from which ])oint it gradually apjiroaches the 
base of the dorsal, where it terminates under the fifth ray from the last ; 
along its anterior course it is separated from base of dorsal by from 4 to (! 
scales (in oblique series); scales minutely ctenoid except on head, breast, 
and belly, on ua]>e uniler anterior dorsal spines, and on I ase of pectoral ; 
top of head sealed forward to interorl)ital space, the anterior scales here. 
