48 



BULLETIN OF THE BUREAU OF FISHERIES. 



Measurements, in hundredths of total length, without caudal; Length of head 37; of snout 10; 

 diameter of orbit it; interorbital width 3; greatest width of head 24; greatest depth of body 23; 

 least depth of caudal peduncle 7; distance from tip of snout to hinder edge of gill membrane on median 

 line 22; length of base of dorsal 52; of anal 2S; longest pectoral ray 30; longest ventral rayi6; longest 

 caudal ray 26. 



Dorsal vm, 14; anal 11; pectoral 22 or 23; caudal 17 (9 rays forked); ventral i, 3. Lateral line 

 with 19 or 20 pores, including the one at upper attachment of opercular membrane; large terminal pore 

 at base of caudal fin. In 25 specimens, including the type and 4 cotypes, and 20 specimens from sta- 

 tion 5025, off the east coast of Sakhalin Island (depth 52 fathoms), the fin and pore formulae are as 

 follows: 



Fig. 7. — Artedicllus miacanthus, uew species. Type. 



Lower jaw included, maxillary scarcely reaching margin of pupil; teeth on premaxillaries ante- 

 riorly in a wide band which tapers laterally and consists of a rather close-set posterior series curved 

 downward and backward, a slightly enlarged anterior row, and scattered teeth between; mandibular 

 band narrow, mostly of two somewhat irregular series, the posterior series enlarged; vomerine teeth in a 

 single curved row; a small lenticular patch on anterior portion of palatine. Upper preopercular spine 

 comparatively small and slender, strongly curved, the tip often directed upward and forward, on a 

 level with upper pectoral ray; usually no trace of a denticle or cusp on inner edge of spine, but a 

 minute prominence represents such cusp in a few individuals; the lower preopercular spine is strong, 

 directed as usual downward and forward; the space between the upper and lower spines is witliout 

 any developed spine or marked prominence. Nasal spine wholly obsolete, the nasal bone much 

 reduced and bearing no denticle. Both nostrils bear short tubes. No occipital prominence. Barbels 

 moderately developed, a supraocular pair and a pair at posterior edge of occiput; one or often two or 

 three in a series at upper edge of pupil, and sometimes a few others scattered on upper part of eyeball; 

 a simple barbel on maxillary, usually a small one on cheeks near base of upper preopercular spine, and 

 a small one on opercle; no barbels on preorbital, on margin of preopercle, on nape, or along lateral line. 

 Pores on head noticeably larger than in Ariedicllus pacificus, the anterior mandibular pair never coal- 

 escent, though this is always the case in A. pacificus. A pair of pores, opposite or nearly so, on anterior 

 part of interorbital space; three in a cross series immediately behind the orbits, the middle one some- 

 times a little advanced. Gill membranes with a wide free posterior margin. 



