1762 Bidletin^'/, United States Natio7ial Museum. 



gitudinal ridges. Cranial ridges thin and sharp, rather high; nasal, 

 prcocular, postocular, tympanic and nnchal spines prominent, sharp, the 

 supraocnlar and parietal smaller, all arranged in a nearly straight line; a 

 small sharp spine behind orbit, followed by a larger ridge and spine; a 

 rather shai-p s]nne on shoulder; preorbital with 2 broad blunt lobes or 

 spines, with a large pore between them; suborbital ridge nearly continu- 

 ous from front of preorbital to preojierclo, close up under eye, thin and 

 high, with 1 spine under anterior margin of orbit, anothea- under its 

 middle, and 2 behind orlnt; uppermost preopercular spine long, with a 

 smaller one in front of its base, the following 4 much smaller, the last one 

 minute; opercular ridges and spines weak. Mouth large, nearly horizon- 

 tal, maxillary reaching nearly to posterior margin of orbit, about 2 to 2?- in 

 head; jaws equal, the lower included laterally and terminating with a 

 slight symphyseal knob; anterior ends of premaxillaries enlarged, den- 

 tigerous, with a prominent bony projection, and widely separated by an 

 interval into which fits the tip of lower jaw. Teeth in very narrow bands 

 on vomer and palatines, in broader bands on jaws. Gill rakers short, den- 

 ticulate, about 11 movable and about 5 rudiments on anterior limb of first 

 arch. Pseudobranchia' rather large. Dorsal spines rather low, the fourth 

 and fifth longest, about Sj in head, the thirteenth and fourteenth very 

 short, more than 3 in the fifth ; second anal spine longest and strongest, 

 2\ in head, a little longer than soft rays, but not reaching their tips when 

 laid back; origin of ventrals under base of pectorals; pectoral rays 

 long, reaching to vent, and much beyond tip of ventrals; rays nearly all 

 branched, the upper much longer, about 7 lower rays broad and exserted; 

 base of pectoral not procurrent, broad, 3| in head. Scales on body large, 

 strongly ctenoid, those on head partly cycloid; mandible, branch iostegal 

 membranes, and tip of snout naked; maxillary with a patch of scales; 

 preopercle with a few; preorbital, cheeks and iuterorbital space scaly; 

 basal half of pectoral membranes and whole of rays, basal part of spi- 

 nous dorsal, basal half of soft dorsal membranes and whole length of rays 

 and the ventrals, caudal and anal almost entirely scaled; breast scaly; 

 basal part of ventrals naked. Color red; a dark patch between first and 

 third dorsal spines, another between sixth and eleventh ; distal parts of 

 caudal and ventrals and lower rays of pectorals dark; gill cavities some- 

 what dusky; peritoneum white. Bering Sea and Pacific coast of Alaska, 

 Washington, Oregon, and California, in 109 to 786 fathoms. Here de- 

 scribed from specimens obtained by the Aliatross. {alascanus, Alaskan.) 



Sebastolobus alascamis, Bean, Proc. TJ. S. Nat. Mus. 1890, 44, off Trinity Islands, Alaska, 

 in 159 fathoms (Coll. Albatrosi) ; Gilbert, Ropt. U. S. Fish Comm. 1893 (1896), 409.* 



* Dr. Gilbert haa the following note on Sebastolobus alascamis: 



" Resembling closely ,S. viacrochir, 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 2§ in length; depth 4 (in specimen 360 mm. long). Pores of lateral line 35. Dorsal 

 XVI, 9; anal III, 5; iiectorMl 21. Mouth largr, the maxillary nearly reaching vertical from 

 posterior Itordcr of orhil, 2 to 2', in head, its wiiilli i;r<atcr"than diameter of pupil. Pre- 

 maxillary band oltcclli wide, sliiitting largely outside mandible in front and on the 

 sides; aconHi>uuons MilxMcle af tip of eaeli jiremaxillary with a deep emargiuation be- 

 tween the two. into which fits the tip of the mandible.' A small knob at mandibular 

 symphysis. Eye large, Hi to 3J in head, 2| times the iuterorbital width. Cranial ridges and 

 spines about as in the other species of the genus, but the occipital ridges not strongly 

 diverging, as in (S*. macroehir. Preorbital posteriorly with a spinous point, as in S. altivelis. 

 Dorsal spines low, the contour of the tin evenly rounded, the spines increasing regularly 



