416 REPORT OF COMMISSIONER OF FISH AND FISHERIES. 
, 
Head long, smaller than in J. oculatus, 2? in length. The occipital ridges blunt, 
the included space gently concave, not pit-like. Interorbital space wider than in | 
I. oculatus, not distinctly concave, the median ridge very faint, the width about 
one-fourth eye (in oculatus about one-tenth eye). Supraocular and occipital ridges | 
rugose or minutely pitted. Two conspicuous mucous pores behind each eye, the | 
anterior margins of the pores often elevated to form a spinous projection. Eye 
small, 4 in head. Mouth large, extending beyond vertical from pupil, 2} in head, 
Teeth in narrow bands on jaws, vomer and palatines. The two anterior pores on 
mandible open together at symphysis, as in all the other species of the genus except 
I. oculatus, where they open separately, on either side of the symphysis. Preoper-_ 
cular spine large, about as large as eye, with three antler-like processes directed 
upward. Below this is a weak spinous projection directed backward (wanting in 
many specimens) and two stronger ones downward and forward. A spinous point 
at the lower angle of subopercle; an indistinct spine terminating occipital ridge. 
Armature of sides as in J. oculatus, the dorsal series of plates extending continu- 
ously onto back of caudal peduncle. No scattered plates behind pectorals. A large, | 
rather broad, supraorbital flap, bifid or trifid, or occasionally with more than three 
terminal filaments; the height of flap equals or slightly exceeds diameter of pupil. 
A white filament near tip of maxillary; two pairs on occipital ridges; one, not wholly 
constant, on cheeks overlying suborbital stay; a few scattered ones accompanying 
plates of lateral line. None of the dorsal spines elevated. Pectoral fins reaching 
slightly beyond origin of anal. Dorsal 1x or x-16 or 17; anal 12 to 14; pectoral 16; 
lateral line 39. Length 75 mm. 
Color: Olivaceous above, sides of head and body vermiculated and blotched with 
olive brown, especially along middle of sides; white below, nearly to lateral line. 
The back with four black crossbars, as in J. oculatus. A dark blotch on cheek, and 
a dark streak forward from eye. Membrane between first two spines of first dorsal 
dark, usually a black terminal bar posteriorly; second dorsal, pectorals, and caudal 
with faint oblique bars. No dusky patch at base of pectoral. Anal translucent. 
Numerous specimens taken both north and south of the Aleutian Islands and in 
Bristol Bay, at stations 3213, 3214, 3222, 3223, 3224, 3226, 3235, 3258, 3265, 3286, 3293, 
3303, 3319, 3321. The depths range from 11 to 121 fathoms. It is impossible to com- 
pare this or any other described species of Icelinus with Icelinus australis Eigenmann, 
described from partially digested specimens. From Eigenmann’s description of the 
preopercular spine, it is even doubtful whether his species is a member of the genus 
Icelinus. 
57. Artediellus pacificus sp. nov. 
Very closely related to A. uncinatus, differing in the entire obsolescence of the 
occipital protuberances or ridges, in the increased number of cirri on the head, the 
more numerous pores of the lateral line, the greater number of rays in the pectoral 
fins, and the reduction in the rays of the caudal. This diagnosis is the result of a 
comparison of our type with Collett’s description of Centridermichthys wncinatus 
(Norske Nord-Havs Expedition, 1880, 29), no typical specimens being at hand for 
comparison. Specimens of Artediellus from the coast of Massachusetts also differ 
from Collett’s description,and may be specifically or subspecifically separable. 
Length of head (measured to end of opercular flap) 2% to 2%; depth 44. Least 
depth of caudal peduncle 13 times in orbit; its length, from base of last anal ray, 2% 
in head. 
Head evenly rounded in all directions, the orbital region not elevated, the snout 
not angulated. Mouth slightly larger in males than in females, reaching vertical 
from middle or posterior margin of pupil, 2} to 2! in head. Lower jaw shorter than 
the upper, a portion of the premaxillary band of teeth projecting beyond the 
mandible in closed mouth. Teeth cardiform, in rather broad bands in jaws, and im 
patches of varying size on vomer and palatines. In some specimens a few teeth 
