416 REPORT OF COMMISSIONER OF FISH AND FISHERIES. 



Head long, smaller tbau in /. oculaius, 2f in length. The occipital ridges blunt, 

 the included space gently concave, not pit-like. Interorbital space wider than in 

 /. oculaius, 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 ojjen together at symphysis, as in all the other species of the genus except 

 /. ociilatun, wliere they open separately, on either side of the symphysis. Preoper- 

 •ular spine largo, about as large as eye, with three antler-like processes directed 

 upward. Below this is a weak si)inous 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 /. oculatus, the dorsal series of jilates extending continu- 

 otisly 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 ix 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 /. 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 Eigenniaun's description of the 

 preopercular spine, it is even doubtful whether his species is a member of the geuus 

 Icelinus. 



57. Artedlellus pacificus sp. nov. 



Very closely related to A. uncinatus, dift'ering 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 Ceniridermichlhys uncinatus 

 (Norske Nord-Havs Expedition, 1880, 29), no typical specimens being at hand for 

 comparison. Specimens of Artediellus from the coast of Massachusetts also dift'er 

 from Collett's description and may be specifically or subspocifically separable. 



Length of liead (measured to end of opercular flap) 2J to 2^;, ; depth 4^,. Least 

 depth of caudal peduncle 1 J times in orbit; its length, from base of last anal ray, 2g 

 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, 2h to 21 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 bauds in jaws, and in 

 patches of varying size on vomer and palatines. In some specimens a few teeth 



