t ICHTHYOLOGICAL COLLECTIONS OF THE ALBATROSS. 411 
|49. Malacocottus zonurus Bean. 
Several specimens taken at stations 3227, 3330, 3331, north of Unalaska Island, and 
at stations 3337 and 3339, south of Unimak Island; depths, 138 to 351 fathoms. 
In addition to the characters given by Dr. Bean, we call attention to the following: 
Nasal spines obsolete. Supraorbital rim low, slightly elevated in front but not 
behind; the interorbital space wide, shallowly concave. Occiput with two blunt, 
conical protuSerances in lieu of ridges, and without spines. A slight occipital 
depression. Preopercular angle with three radiating spines of nearly equal length, 
and a smaller spine directed outward in advance of the middle one of the three; 
| below these a partially concealed spine directed downward and forward. Opercular 
rib very strong, sharp anteriorly, broadening behind, and provided with three low 
| ridges, not ending in a definite spine. A spinous point on subopercle and one on 
‘interopercle; none on shoulder. 
Anterior nasal tube short, the posterior margin prolonged into a laciniate flap. 
Head well provided with slender cutaneous filaments; three on upper portion of 
eyeball, four in a transverse line behind occiput, a very long one on opercular angle, 
and numerous shorter ones on opercle, jaws, and along anterior portion of lateral 
line. Branchiostegals 7. Body without plates or prickles; the head, including 
‘upper part of eye, and the upper anterior part of body, with sparsely distributed 
stellate granulations, visible only in large specimens. In our specimens the brown 
bar at base of caudal is followed by a wide white bar, sometimes more or less broken; 
| the terminal half of fin blackish, narrowly margined with white. 
| 50. Dasycottus setiger Bean. 
Taken at stations 3216, 3257, 3310, 3311, and 3334, located north and south of the 
Alaskan Peninsula and north of Unalaska Island; depths, 50 to 85 fathoms. 
Tubercles on head definitely placed: 1 in front of eye; 4 above orbit, the poste- 
rior two the largest; a pair on middle of suborbital stay, with a smaller one above 
them; 1 on temporal region, and 1 on shoulder; by far the largest pair on occiput, 
where they are high compressed spines, directed vertically upward, as long as diam- 
‘eter of pupil. Nasal spines obsolete. Cirri are generally distributed over upper 
part of head and body, the longer ones being specially numerous on maxillary, under 
surface of mandible, and on the opercle and preopercle. Of the larger ones, two 
_ often proceed from one base. A series of short filaments along upper edge of pupil. 
Mucous pores large, those of the mandibular and buccal series slit-like. In adults, 
the dorsal bands break up into series of spots and become inconspicuous. 
51. Icelus bicornis (Reinhardt). 
Not hitherto recorded from Pacific waters. Our specimens are more constant in 
their characters than the Atlantic individuals reported on by Collett (Den Norske 
Nordhavs Expedition, 1880, p. 35). A definite narrow band of fine prickles extends 
_along the upper edge of the dorsal series of plates, usually occupying less than half 
the space between plates and base of dorsals, and extending posteriorly to end of 
‘soft dorsal. Similar prickles cover top and sides of head. The plates of the lateral 
line invariably extend to the root of the caudal fin, and the dorsal series to the back 
(of the caudal peduncle. None of the specimens before us have plates along the base 
of the anal fin. The species differs conspicuously from J. spiniger and I. canalicu- 
latus in having a deep pit on occiput, bounded laterally by high occipital ridges, 
‘each of which bears two rounded prominences or spines. The preopercular spines 
are longer and sharper, and the bifurcation of the upper spine deeper than in the 
species mentioned. In two individuals the upper spine is trifureate, the branches 
very long and curving upward. ‘lhe fin rays in six specimens are as follows: Dor- 
| sal vi1I-20, 1x-19, 1x-21, rx-20, rx-20, 1x-19; anal 16, 16, 15,17, 16,15. These average 
slightly higher than counts of Atlantic specimens, none of which are at hand for 
‘comparison. The Pacific form may prove specifically separable. 
