et neta 
ICHTHYOLOGICAL COLLECTIONS OF THE ALBATROSS. 415 
riorly on occiput, and one occupying tips of occipital spines. The pair on opercles 
ean not be made out. 
_ Armature of body as in less strongly scaled specimens of J. vicinalis. Lateral line 
provided with the usual spinous scales, 43 to 44 in number; 40 scales in the dorsal 
series, which extends to base of caudal. Above it isa rather crowded irregular series 
of smaller scale-like prickles, some of which are larger than the others and alter- 
nate rather regularly with the plates of the principal series; posteriorly the smaller 
of the upper series are absent, the alternating larger ones alone present. Ten or 
twelve small spinous plates are irregularly disposed between lateral line and dorsal 
series. A patch of spinous plates behind pectorals. 
Color evidently as in J. vicinalis, though very greatly faded from exposure to light. 
The back shows traces of two dark crossbars under soft dorsal; one occupies end of 
eaudal peduncle, and a very indistinct one extends downward from spinous dorsal, 
which is black posteriorly. Belly, and under parts generally, dusted with fine 
black specks, the isthmus becoming abruptly white. Nostriltube white. Subocular 
region blackish, the color continued forward onto the preorbital, opposite the front 
end of which it crosses upper andlowerlip. A dark blotch on maxillary in advance 
of tip. Pectorals dusky. 
55. Icelus scutiger Bean. 
This species is distinguished from all others in the genus by the absence of the 
series of enlarged spinous plates along the base of the dorsal fin. Our specimens 
agree with the types in having the sides above lateral lines densely covered with 
scales. These are not uniform in size, and are arranged in rather irregular oblique 
series. The sides behind pectorals contain larger spinous plates, and the tail below 
lateral line is densely scaled, leaving only a narrow naked strip along each side of 
anal base. As stated, the upper half of head is densely covered with small prickles. 
i As in other species of Jcelus, the upper preopercular spine may be simple or bifur- 
-eate. The latter condition obtains in most of our specimens. AIl of the preopercular 
spines are weaker than in other species of the genus. 
Compared with the nearest allies, J. ewryops and J. canaliculatus, the species is 
further distinguished by its more robust body (the depth approximately 5 in length 
instead of nearly 6), by the smaller eye (in which the snout is contained 1} times 
instead of nearly twice), the narrower interorbital space, the very slight develop- 
“ment of the occipital crests, the obsolescence of the occipital spines, and the great 
height of the spinous dorsal fin in the male specimens. It has also a shorter second 
‘dorsal fin, the formula in 11 specimens being 1x-19, 1x-19, 1x-19, 1x-19, 1x-19, rx-20, 
x-19, x-19, x-20, x-20, x-20. It has less the appearance of a deep-water species, 
the mucous canals and pores being less conspicuous and the color lighter, with no 
brownish-black or blue-black tints. In alcoholic specimens the upper parts are light 
brown, the lower side of head and belly, including the ventral fins, whitish. A 
vertical black bar occupies base of upper half of pectorals, a streak extending from 
its lower end out along middle ray of fin. The black bars characteristic of its con- 
geners are here represented by irregular, rather sharply defined blotches on back 
‘and sides. These extend also onto spinous and soft dorsal fins. A distinct dark 
streak runs forward from eye, crossing premaxillaries, and leaving tip of snout pale. 
- Mouth and gill-cavities white. 
Numerous specimens were taken at station 3339, south of the Alaskan Peninsula, 
‘at a depth of 138 fathoms. 
. 56. Icelinus borealis sp. nov. (Plate 25.) 
f 
Very similar to I. oculatus, but differing in the large size of the preopercular spine, 
‘the smaller, less elliptical, eye, the wider interocular space less abruptly expanding 
anteriorly, the lower occipital ridges, and in the much smaller size. 
Body slender, tapering rapidly backward to caudal peduncle, whose least depth 
(is 33 to 4} in its length; depth 4% to 54 in length, in specimens 1} to 3} inches long. 
