ICHTHYOLOGICAL COLLECTIONS OF THE ALBATROSS. 409 



the third. Soft anal rays higher than soft dorsal, 2^ in head. Caudal well notched. 

 Veutrals long, reaching veut. Pectorals longer, reaching nearly to front of anal. 

 Gill-rakers long, clavate, half diameter of orhit, 25 on anterior limb of arch. 



Scales rough ctenoid, covered with many accessory minute ones, which are especially 

 abundant on head and nape. The head is wholly scaled, including the iuteropercle, 

 maxillary, and mandible, and the outer branchiostegal rays. The anterior surface 

 of the pectorals and the oiiter caudal rays are closely invested with minute ctenoid 

 scales, which extend well toward the tips: they also invest the soft dorsal and anal 

 fins. About 58 or 60 series of scales above lateral line, running obliquely downward 

 and backward. 



Color: Bright carmine red, lighter on belly. Dorsal dusky, edged with black. 

 An elongate olive-brown blotch along base of soft dorsal; a shorter one under the 

 last spines, and a faint oue under the middle of spinous dorsal, the latter extending 

 farther down on sides. A dark blotch on back of caudal jieduncle. Belly silvery, 

 washed with red. A dark blotch on opercle and one on axil; a crossbar on occiput, 

 one on snout and two bars on cheeks, dusky. Lower lip and tip of mandible blackish ; 

 mouth and gill-cavity dusky. Peritoneum jet-black in the young, varying from black 

 to gray in adults. Fins all red, the spinous dorsal broadly margined with blackish, 



44. Sebastodes diploproa Gilbert. 



Station 3349, near Point Reyes, California, depth 239 fathoms. 



45. Sebastolobus alascanus Bean. 



Resembling closely S. macrochir, but differing constantly in the increased number of 

 dorsal spines, 16 (17 in one specimen) instead of 15, and in the longer second anal spine. 



Head 2f in length; depth 4 (in specimen 360 mm. long). Pores of lateral line 35. 

 Dorsal xvi, 9; anal iii, 5; pectoral 21. Mouth large, the maxillary nearly reaching 

 vertical from posterior border of orbit, 2 to 2\ in head ; its width greater than diam- 

 eter of pupil. Premaxillary band of teeth wide, shutting largely outside mandible 

 in front and on the sides ; a conspicuous tubercle at tip of each premaxillary with a 

 deep emargination between the two, into which fits the tip of the mandible. A 

 small knob at numdibular symphysis. Eye large, 3^ to 3|^ in head, 2| times the 

 interorbital Avidth. Cranial ridges and spines about as in the other species of the 

 genus, but the occipital ridges not strongly diverging, as in .S'. macrochir. Preorbital 

 posteriorly with a spinous point, as in S. altivelis. 



Dorsal spines low, the contour of the fin evenly rounded, the spines increasing 

 regularly from the first to the fourth, then as regularly diminishing to the fourteenth ; 

 the fifteenth and sixteenth again lengthened. The longest spine is contained from 

 2-^ to 2* times in the length of the head. Second anal spine longer and stronger 

 than third, equaling or exceeding length of soft rays, its length 2 to 2f in that 

 of head. Ventrals usually scarcely reaching vent, the pectorals not reaching front of 

 anal. Lower pectoral lobe unusually broad, contains 7 to 9 thickened rays. Head 

 less completely scaled than in S. altiveUs, the branchiostegals, mandible, maxillary, 

 and lower portion of preopercle wholly naked. 



Color red. A black blotch occupies the membranes of the first three dorsal spines, 

 a second extends from the sixth to the eleventh spines. Margin of pectoral and 

 ventral fins black. No black blotch behind second anal spine. Peritoneum and 

 lining of gill-cavity white. 



This species ditt'ers from S. altivelis in the lower, longer, evenly rounded spinous 

 dorsal, the white lining of the gill-cavity, and the partly naked head. It wa« 

 taken abundantly on the Alaskan expedition, being represented from the following 

 stations : 3227, 3324, 3330, 3331, 3332, 3337, 3338, 3339, 3340, 3343, 3346, 3347, and 3348. 

 These are located in Bering Sea, north of Unalaska Island; in the North Pacific 

 southeast of Unimak Island, and off" the coasts of Washington, Oregon, and Cali- 

 fornia. They represent depths of from 109 to 786 fathoms. 



