1021 . 
Li op.ur*u s daru s Gilbert and Hubbs 
Lionurus darus Gilbert and Ihibbi|, Proc. U. S. Nat. Mus., vol. 51, p. 
(146) 197, 1916 (type locality t Suruga Gulf, Hondo, 197 fathoms). 
Lionurus durus Gilbert and Hubbs , Proc. U. S. Nat. Mus., vol. 51, pi. 
10, fig. 1, 1916. 
Depth 8; head 6 2/5, width 2 2/5. Snout 3 in head? eye 3, 
greater than snout or interorbital; maxillary reaches l/4 in eye, length 
from front end 3 in head; preoral nearly vertical, length 4 l/3; mandib¬ 
ular barbel slender, 1 l/3 in eye; teeth villiform, minute, in 3 or 4 
irregular series in jaws; interorbital 4 l/5 in head, low, nearly level. 
Gill rakers 2 + 7 low spinescent tubercles on second arch, l/3 of gill 
filaments, which 2 2/5 in eye. 
Scales 100 in lateral line to end of broken tail, of which 10 
forward of vent; 11 above, 25 below, 36 predorsal* Scales firmly adher¬ 
ent, finely spinulose or velvety to touch, on head equal to those on 
body* Scales with 10 or 11 parallel rows of slender spinules apically, 
last extended beyond hind scale edge; circuli moderate. 
D. II , 1 0 1 48 ? f second simple rey (broken) with row of well 
spaced denticles along front edge, length 1 + l/3 times head; interdor¬ 
sal sapce 3 in head; A. 135?, much higher than low second dorsal; pec¬ 
toral rays I, 18, fin 1 3/4 in head; ventral rays I, 8, fin 1 3/4. 
Brown, becoming darker on under surface of head posteriorly, 
breast and belly, last blackish below. Iris dark gray* Inside mouth 
pale and gill opening brownish. Fins brown, dusky basally 
Japan. 
