634 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
band on palatines; branchiostegals 7, the anterior concealed; pseudobranchige large; gill-rakers 
clavate, toothed, short, about one-third diameter of pupil, 9 present on horizontal limb of anterior 
arch; a narrow slit behind fourth gill-arch; scales on cheeks mostly smooth, those on opercles and 
occiput strongly ctenoid; interorbital space, snout, mouth parts, and lower side of head largely naked. 
Spinous dorsal very low, rounded, the last spine much longer than the preceding spines; first anal 
spine very short, the second longer and stronger than the third, or than any of the dorsal spines; pec- 
torals reaching vertical from third anal spine; all the rays simple in the type, the lower thickened, 
with projecting tips, the longest rays just below middle of fin; ventral fins extending a little beyond 
vent, which is distant from front of anal slightly more than one-third length of ventrals. 
Scales moderately ctenoid, those on breast, prepectoral area, and abdomen smooth; tubes forming 
lateral line membranous. 
Color, reddish, with dusky mottlings along back, and lighter or reddish blotches at base of dorsal 
fin; a broad light reddish bar on tail; snout and top of head finely speckled with olive-brown; a "black 
spot between seventh and tenth dorsal spines, and small dark spots at base of some of the spines and 
rays; two small dark spots dividing base of pectoral fin into thirds; mouth and gill-cavity white. 
The species was taken at stations No. 4077, off the north coast of Maui, 99 to 106 fathoms, and 
4098, off the north coast of Maui, 95 to 152 fathoms. 
Setarches remiger (Gilbert & Cramer). 
As in other species of Setarches, the lateral line is a very broad membranous tube overlying the 
scales. There are 25 or 26 segments of this tube corresponding to the sensory papillae. In young 
specimens all the pectoral rays are simple, but in adults all are forked except the upper 2 and the 
lower 5 or 6 rays. The lower undivided rays are somewhat thickened. 
The following details correct those given in the original description: Snout much longer than 
diameter of orbit; two lower preocular spines smaller than the others, but well developed; width of 
dilated end of maxillary contained If in diameter of orbit; a narrow band (or a single series) of minute 
teeth along entire length of palatines; ventral fins extending but f distance from their base to vent; 
caudal fin truncate, with rounded angles; five heavy pyloric caeca; pseudobranchige well developed. 
The species was taken at the following stations: Nos. 3865, Pailolo Cha,nnel, 256 to 283 fathoms; 
3867, Pailolo Channel, 284 to 290 fathoms; 3883, Pailolo Channel, 277 to 284 fathoms; 3884, Pailolo 
Channel, 284 to 290 fathoms; 3898, Pailolo Channel, 258 to 284 fathoms; 3899, Pailolo Channel, 283 to 
284 fathoms; 3925, off the south coast of Oahu, 299 to 323 fathoms; 3942, vicinity of Laysan, 146 to 222 
fathoms; 3943, vicinity of Laysan, 100 to 222 fathoms; 3947, vicinity of Laysan, 97 to 199 fathoms; 
4058, off the northeast coast of Hawaii, 190 to 195 fathoms; 4082, off the north coast of Maui, 220 to 
238 fathoms; 4122, off the southwest coast of Oahu, 192 to 352 fathoms; 4132, vicinity of Kauai, 257 to 
312 fathoms. 
Scorpxna remigera Gilbert & Cramer, Proo. U. S. Nat. Mus., xix, 1897, 418, pi. XL. 
Plectrogenium, new genus. 
Related to Sebastosemus, but much more slender, with broad head, the width of which equals the 
depth, and with dorsal fin divided to base; second anal spine longer and stronger than third; pectoral 
notched,. its upper portion consisting of forked rays, the lower unbranched, some of them elongate, form- 
ing a projecting lobe; scales large and strongly ctenoid, covering head and pectoral fins; no occipital 
pit; interorbital region flattish; a series of very strong spines along sides of head. 
riectrogenium Gilbert, new genus of Scorpxnidx (nanum). 
Plectrogenium nanum, new species. Fig. 248. 
Type, 70 mm. long, from station 4082, off north coast of Maui, depth 220 to 238 fathoms; type No. 
51598, U. S. Nat. Mus. 
Length of head 40 hundredths of total length without caudal; depth of head at occiput 22; greatest 
width of head (without spines) 26; diameter of eye 15; width of middle of interorbital space 8; length 
of snout 10; length of maxillary 12; greatest depth of body 25; least depth of caudal peduncle 9; length 
of caudal peduncle from base of last anal ray 27; longest (fourth) dorsal spine 16; second anal spine 16; 
third anal spine 12; longest pectoral ray 25; longest ventral ray 22. D. x-ix, 7; A. xri, 5; P. 23. Scales 
in lateral line 28 or 29, 2\ series above lateral line, 7 series between lateral line and vent. 
