FISHES FROM BERING SEA AND KAMCHATKA. 



45 



Mouth more oblique than in Aitediellus pacificus, the maxillary scarcely reaching vertical from 

 middle of pupil. Teeth as in other species, the outer series in the upper jaw and the inner series in 

 the lower jaw slightly enlarged; a single series on front of vomer, and a small elliptical patch on front 

 of palatines. Upper and lower preopercular spines developed as usual, the upper comparatively 

 small, sharply curved, its tip usually a little below level of upper end of pectoral base; in a young 

 specimen, 43 mm. long, a well-marked denticle is present on the inner margin of the curve; in older 

 specimens, traces of a denticle may persist, or it may entirely disappear; the lower preopercular spine 

 is short, directed downward and forward; between the two spines are 2 small roimded prominences, 

 the upper of which is directly below base of upper spine. Nasal spine present, but minute, less 

 developed than in pacificus. Occiput depressed, without trace of ridges or prominences. Anterior 

 nasal tubes long, the posterior short or obsolete. Filaments all simple, unusually well developed 

 and numerous; supraocular pair largest; a series of short filaments or papillae along upper edge of pupil, 

 with occasional scattered ones on upper part of eyeball; a single pair on occiput, i to 3 along anterior 

 border of preorbital, usually 2 long filaments on cheeks in front of base of preopercular spLne, i to 3 

 short ones on middle of cheeks, a long one on opercle, and several forming a series above anterior por- 

 tion of lateral line. Pores on mandible and preorbital large, the anterior mandibular pores facing 

 each other but well separated and distinct. A pair of pores on anterior part of interorbital space, a 



Fig. s. — Arledicllus ochotcnsis, new species. Ti*pe. 



median pore usually em middle of interorbital space, and a transverse row of 3 just behind orbits. 

 Anterior pores of lateral line frequently accompanied each by 3 small imperforate papillae, i below tlie 

 canal and immediately in advance of tlie pore, tlie other 2 above the canal and opposite the pore and the 

 lower papilla; altliough imperforate, the papillae may be cupped at the apex and are doubtless obsolete 

 pores. Gill membranes with a free fold, tlie width of which varies; in the type, the fold is very nar- 

 row, less than half the diameter of the pupil. 



In males the dorsal fins are contiguous and may even be slightly joined at base, but they are well 

 separated in females; spinous dorsal in males moderately elevated, the first 4 spines with membranes 

 incised one-third their height; ventrals unusually long, reaching nearly to vent in both sexes; the 

 upper 8 or 9 pectoral rays forked and longer than the succeeding rays. 



Lateral pores very small, in a series along lower margin of the main canal, which opens by a large 

 pore at base of caudal . 



Colors in life: Top of head and dorsal region finely vermiculated with light reddish brown; small 

 round dark spots frequently are grouped to outline a bar under spinous dorsal, a second under soft 

 dorsal and a third on caudal peduncle; below lateral line, an irregular series of larger round dark red- 

 dish spots; dorsal and caudal coarsely barred with dark reddish brown, the bars breaking up below 

 and merging in the general dusky coloration of that portion of the fin; in females, the pectorals are 

 85079° — Bull. 30 — 12 4 



