JAPANESE FISHES. 
605 
86. Reg-ania nipponica Jordan & Gilbert, new species. 
Type No. 50931, U. S. Nat. Mus. 590 mm. (tail slightly injured), from station 3721, Suruga Bay, 
depth 207 to 250 fathoms. /g > ; , l7 „ ,g 
First dorsal ii, 10; ventrals -9; pectorals 4-7; gillrakers 5 -j- 16; branchiostegals 7. Head 5.12 in 
total length; depth 7.66. 
Head intermediate in width and texture between Gadomus multifilis and Batliygadus cottoides, some- 
what nearer former in appearance, but the barbel wholly lacking, as in latter; form elongate, head 
tapering regularly to a rather sharp snout; mucous canals large, covered by thin membrane, which is 
supported by thin, long septa; interorbital width exceeds length of snout, much exceeds diameter of 
large eye, and is contained 3.43 times in length of head; length of snout 3.71; longitudinal diameter 
of eye 4.2, the vertical diameter five-sevenths the horizontal; nostrils unusually large, anterior verti- 
cally elliptical, but little more than half the height of posterior, which is about one-fourth diameter 
of orbit; occipital crest short, the difference from its posterior end to origin of dorsal contained 2.25 
times in its distance from tip of snout. Posterior margin of orbit a trifle in advance of middle of 
length of head. 
Mouth comparatively little oblique, maxillary reaching a little beyond vertical from posterior 
edge of orbit, its length 1.87 in that of head. Mandible wholly included; a slight syniphyseal knob: 
no barbel. Teeth fine, crowded, but individually visible without aid of lens, growing much smaller 
toward angle of mouth, distinctly arrow-shaped, as usual in the allies of Batliygadus; premaxillary 
band fully twice the width of mandibular band, its greatest width about one-seventh the orbital 
diameter; preopercle widened at angle, its greatest width about equaling vertical height of suborbital 
below middle of eye, about one-eighth the length of head; opercle firm, without evident ridges or 
spines. The gill membranes are injured anteriorly on middle line of throat, so the width of the free 
fold can not be determined; 4 full gills present, length of fourth gill slit half the orbital diameter. 
Gillrakers long and slender, the longest slightly more than half the orbital diameter. No trace of 
, pseudobranchige present. Suprabranchial very deep; origin of dorsal behind insertion of pectorals, 
which are vertically over ventrals; first dorsal and pectoral rays injured at tip, but the second dorsal 
’ spine and upper pectoral ray are not thickened, and were probably not greatly produced; rays of first 
dorsal forked; a very short interval between dorsal fins; rays of second dorsal much higher than anal 
rays; anal origin vertically below eleventh ray of second dorsal; vent in advance of anal a distance 
equaling one-third the orbital diameter; base of outer ventral ray midway between vent and front of 
pupil; outer ventral ray slightly produced, reaching two-thirds the distance to vent. 
