672 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
orbit; interorbital space concave, its width contained 1.2 in diameter of orbit; snout and lower side 
of head naked, save for a V-shaped patch of scales extending from the interorbital space forward, 
the apex of the V on median line between nostrils; a narrow band of spinous scales surrounding 
anterior segment of orbit; preopercular angle a little produced, its vertical margin concave; gill- 
membranes narrowly joined across throat and largely free from isthmus. 
Second dorsal spine with 8 strong serrations, evenly spaced, none of these on the basal fourth ; 
filamentous tip short, the entire spine contained 1.4 times in head; interspace between dorsals equal 
to base of the first; second dorsal very low; anal originating under third or fourth ray of first dorsal, 
its longest rays equal to length of snout and eye; pectorals long and slender, reaching to opposite 
seventeenth anal ray, their length 1.5 in that of head; filamentous ventral ray reaching base of twen- 
tieth anal ray, its length equaling that of head; distance from vent to axil of ventrals 0.7 its distance 
from front of anal. 
Scales small, very deciduous, mostly lost in the type, 11 in a series from lateral line to base of 
second dorsal spine; those on back, under origin of second dorsal* have each a strong median ridge 
which bears 5 ghort strong spines directed very obliquely backward, and a pair of shorter lower ridges, 
parallel with the first, and bearing from 1 to 3 similar spines; on breast, head, and antedorsal region 
the scales are smaller and bear usually the median ridge only. 
Color, back and sides grayish, checkered by narrow black lines margining the scales; sides 
and lower part of head and abdomen jet-black; gill-membranes blackish on inner surface as well as 
outer, but the lining membrane of mouth and gill-cavity otherwise whitish; peritoneum dusky silvery; 
along the sides and tail about 12 narrow black cross-lines, the posterior more distinct than the anterior, 
only a few of them complete; dorsal uniformly dusky, anal translucent, with a wide black margin; 
pectorals and ventrals, including the ventral filament, blackish. 
Only the type known. 
Macrourus longicirrhus, new species. Fig. 263. 
Type, 590 mm. long, from station 4185, vicinity of Kauai Island, depth 1,000 to 1,314 fathoms; 
type, No. 51592, U. S. Nat. Mus. 
Body robust, depth 5.5 in total length; head 4.55. First dorsal ii, 10; V. 11; P. 21; scales between 
lateral line and base of second dorsal spine 6. 
Head depressed above orbits, a low convex curve thence to dorsal, the base of which does not 
form a projection; contours of snout evenly and bluntly rounded; cheeks and suborbitals nearly ver- 
tical, without projecting ridges or prominences;' interorbital convex and very wide, 3.5 times in length 
of head; horizontal and vertical diameters of orbit equal, 1.4 in interorbital width, 5 in head; snout 
projecting but little beyond mouth, its length contained 3.25 times in head; distance from premaxil- 
laries to tip of snout 0.12 length of head; maxillary reaching a vertical from middle of orbit, its length 
2.4 in head; mandible well included; premaxillary teeth in a moderate band; posterior teeth villiform; 
outer teeth enlarged, forming small canines,' the enlarged teeth including some behind the outer series; 
the premaxillary band narrows laterally, but contains always smaller teeth behind an outer series- 
mandibular teeth uniform in size, intermediate in size between inner and outer premaxillary teeth; 
they form at symphysis a very broad band which tapers rapidly toward sides; barbel .17 length of 
head; nostrils small, the anterior round, with its posterior membranous margin elevated, the posterior 
vertically slit-like; preopercular angle greatly produced backward, the margin above angle deeply 
indented; gill-membranes widely joined anteriorly, adnate to the isthmus, without free posterior edge; 
branchiostegals 6; outer branchial' slit very short, the arch almost wholly adnate; length of slit but 
0.3 diameter of orbit; slit behind fourth arch slightly wider; pseudobranchiae present, small. 
Second dorsal spine compressed, rather slender and flexible, its anterior margin furnished with a 
few very fine serrulations; it is produced to a short filamentous tip, which reaches base of twelfth ray of 
second dorsal, and is more than 0.91ength of head; first soft ray 0.8 length of head; interspace between 
dorsals slightly exceeding in length base of first, and contained 3.4 times in head; origin of anal verti- 
cally below beginning of last third of interspace between dorsals; all anal rays injured, the longest 
present being .2 the length of head, and much longer than rays of second dorsal; vent immediately in 
front of anal fin; outer ventral ray greatly produced, reaching base of nineteenth anal ray, 0.25 total 
length; pectoral reaching to opposite twenty-second scale of lateral line; none of its rays produced, the 
longest 1.7 in head. 
