ICHTHYOLOGICAL COLLECTIONS OF THE ALBATROSS. 407 
9. Hexagrammus superciliosus (Pallas). 
1 Taken in abundance with the seine at Unalaska and at Makushin and Chernoffski 
bays, Unalaska Island. Adults of the species were also dredged at depths of 44 and 
| 114 fathoms in Bristol Bay (stations 3244 and 3245). 
_ We find the patch of palatine teeth to be an unreliable character, as five speci- 
mens out of the nine examined do not exhibit it. The species is well distinguished 
' by the depth of the dorsal notch, the comparative smoothness of the scales, and the 
large size of the supraocular flap. The upper line of pores extends well back under 
‘ base of soft dorsal, and the fourth line is unbranched. The sides of head are scaled, 
_ excepting the region over suborbital stay, the snout, and the interopercle. 
The normal fin formula seems to be: Dorsal xx1, 23; anal, 22. 
7 Family SCORPZAiNIDZ. 
40. Sebastodes introniger Gilbert. 
_ Several specimens were taken in Bering Sea to the north and west of Unalaska 
Island, in depths of 85 to 350 fathoms (stations 3311, 3317, 3324, ana 3331). The 
species evidently lives at much greater depths than does S. alutus. The cranial 
ridges are well developed and terminate in strong spines. Coronal spines are usually 
present, but may be absent on one or both sides. In both types of S. introniger, taken 
at a depth of 266 fathoms in the Santa Barbara Channel, California, the coronal 
spines are wanting, but as they agree with our specimens in all other important 
details we make the identification without doubt. We append the following account, 
drawn from Alaska specimens: 
Diagnosis: Scales large, ctenoid. Fins scaled. Cranial ridges and spines rather 
_low but strong; coronal and nuchal spines present. Mandibular symphysis promi- 
j nent, with small symphyseal knob. Peritoneum, mouth, and gill-cavity black or 
; dusky. Color red. 
_ Specific description: Head 2}; eye in head 4. Dorsal x1m-14. Anal 11-7 or 8. 
Pectoral 18. Lateralline 36. Length 14 inches. Mouth large, the maxillary reach- 
_ing to middle or posterior third of eye, 2 in head, its greatest width one-third its 
greatest length. Mandible protruding, entering profile in large specimens, less 
prominent in the young. Symphyseal knob present, but not conspicuous. Teeth 
on jaws, vomer, and palatines in narrow bands. Eye large, longer than snout, 
3+ in head. Interorbital space slightly concave, with two evident longitudinal 
ridges. Cranial ridges sharp-edged and moderately elevated, the spines strong. 
Nasal, preocular, supraocular, postocular, tympanic, coronal, parietal, and nuchal 
spines present; one or both coronal spines occasionally wanting. Preorbital of 
moderate width, its anterior lobe sometimes ending in a spine, the posterior with 
a sharp edge bearing one to four spinonspoints. Preopercular spines large, regularly 
radiating, the two upper ones approximated and more slender, the others broadly 
triangular, directed downward and backward. Two spines sometimes present at 
angle of subopercle. Opercular spines sometimes double. Lower rim of orbit some- 
times serrated. Gill-rakers long and slender, the longest one-third diameter of 
eye; 22 or 23 on lower limb of outer arch. 
Spinous dorsal rather low, the twelfth spine one-half the height of the last, which 
is one-third head; the longest spine 24 in head. Second anal spine stronger, but 
searcely longer than the third,2}in head. Pectoral without thickened lower rays, 
reaching to vent,4! in body. Caudal emarginate. Scales large, ctenoid, about 30 
tubes present in the lateral line. Small accessory scales numerous. All parts of the 
head, including cheeks, maxillary, mandible, branchiostegal rays, snout, and inter- 
orbital space covered with scales. Gular region scaled. All the fins invested to 
their tips with fine scalés. 
Color, uniform bright red, duller than in S. miniatus. Smaller specimens reddish. 
Traces of fine olive-green bars on back. Numerous dark spots along lateral line. A 
dark bloteh on opercle; three bands on cheek, and a blotch in the axil of pectorals. 
_ All the fins edged with black. 
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