ICHTHYOLOGICAL COLLECTIONS OF THE ALBATROSS. 417 



occnr in a single convex series on front of vomer, and but three or four form a line 

 on palatines ; in others, we find an irregular double series or a narrow band on each 

 of these bones. The teeth are always strong, and are probably iu adult specimens 

 never entirely wanting on either vomer or palatines. Longitudinal diameter of 

 orbit 3^ in head. Interorbital space very narrow, shallowly concave, entirely 

 occupied by the supraocular canals, which unite in a single pore opposite posterior 

 margin of orbit. Least interocular width two-thirds pupil. Premaxillary processes 

 projecting but little beyond the profile. Nasal spines very small. Both pairs of 

 nostrils iu short tubes, the posterior situated on anterior orbital rim. 



Occiput with two very inconspicuous low rounded ridges, appreciated with diffi- 

 culty, and sometimes entirely wanting. No trace of the occipital sj^ine which is seen 

 in Massachusetts specimens of Artediellus, nor of the conical protuberance described 

 and figured by Collett. Barbels numerous. Maxillary barbel large and conspicuous, 

 sometimes simple, more often compound, furnished with from one to four short 

 lateral branches. A well-developed supraocular cirrus, and a pair of cirri on poste- 

 rior margin of occiput, the latter occupying the position of occipital spines. A 

 short cirrus near base of opercular flap, and two or three on preopercle, two of which 

 are usually at base of the preopercular spines. Two cirri on anterior part of trunk, 

 one immediately above base of pectorals, the other half way between lateral line 

 and front of spinous dorsal. Sometimes additional cirri above front of lateral line 

 and on lower margin of subocular ring. A series of four or five very short cirri 

 crosses the eye horizoutally immediately above the pupil. Gill-membranes broadly 

 united, joined to the isthmus anteriorly, with a wide free margin. Gills 3^, no slit or 

 pore behind last arch. Preopercular spines as in J. uncinatus, the upper one without 

 smaller basal spine. 



Dorsal fins well separated, low in females, extraordinarily developed in males, the 

 spinous dorsal in the latter well overlapping front of second dorsal and having all 

 of the spines exserted, the median oues for half their length. These exserted spines 

 have their free portions narrowly margined with membrane, which widens at 

 their tips to form a cutaneous flap. Soft dorsal also somewhat elevated in males. 

 Ventral fins reaching half Avay to vent iu females, about three-fourths this distance 

 in males. 



Dorsal vii or viii-12 or 13; anal 11 or 12; pectoral 23 (22 to 24); ventral i, 3; 

 caudal with 9 divided rays (not 11 as in C. uncinatus) ; lateral line 24 (22 to 26). 



A series of five wide mucous slits running along lower edge of suborbital ring and 

 across cheeks. Pores of lateral line minute, at the ends of short downwardly-directed 

 branches, the main line opening in a large slit like pore at base of caudal. 



Color much as iu A. uncinatus, the lower parts whitish, unmarked, the dorsal region 

 of the trunk crossed by three wide dark bars, which often in adults break up ilito 

 spots separated by vermiculations of the lighter ground color. One of these bars is 

 below the spinous dorsal, running downward and forward to base of pectorals; the 

 second is under soft dorsal, the third on caudal peduncle. Top and sides of head 

 generally dark, with fine light dots or vermiculations. A light streak sometimes 

 present, extending from preopercular spine forward and inward, meeting its fellow 

 immediately behind eyes. This V-shaped mark is usually absent or inconspicuous, 

 but is sometimes in young specimens formed of bright silvery-white pigment. 

 Other silvery spots or blotches may occur on the lighter intervals of the back or 

 sides. Pectorals, dorsal, and caudal cross-banded; a black blotch at base of upper 

 and one at base of lower pectoral rays. Tips of elongate dorsal spines of the male 

 black. Ventrals and anal unmarked. 



Taken abundantly at stations 3216, 3219, 3222, 3228, 3251, 3252, 3254, 3259, 3265, 3267, 

 3272, 3273, 3278, 3279, 3280, 3281, 3282, 3285, 3293, 3294, 3302, 3306, and 3323, at depths of 

 from 8 to 61 fathoms. The above stations are in Bristol Bay, excepting 3216 (south of 

 Sannak Island) and 3323 (north of Unalaska Island). 



F. R. 93 27 



