NOTES ON SOME JAPANESE FISHES. 11 



adipose fin, the latter being over middle of base of anal ; preanal 

 adipose fin in front of anal, inserted nearer to anal than 

 to tip of ventral, and behind posterior end of the base of dorsal. 

 Pectoral slender, rather long, extending not quite to the 

 middle of the distance between its insertion and that of 

 ventral ; ventral inserted at a short distance before dorsal or at 

 a point about midway between the insertion of pectoral and that 

 of anal, nearly not reaching the middle between insertion of 

 ventral and that of anal. Gill-openings procurrent beneath and 

 slightly confluent, free from isthmus. Gills 4 ; no p>seudo- 

 branchia? ; gill-rakers represented by short spinous teeth arranged 

 in pairs, o + ll pairs in number. 



Photophores : — Branchiostegals 21 ; jugulars 8, along the 

 sides of the isthmus ; thoracics 22, 3 of these in advance of the 

 pectorals. The jugulars and thoracics form continuous series ; 

 the 2 anterior pairs of thoracics parallel, strongly diverging 

 posteriorly to reach the bases of ventral fins. Ventrals 20, the 

 anterior 2 pairs in advance of ventral fins, between the diverging 

 ends of the thoracic series. Anals 2 + 7, with a wide interspace 

 between the second and third ; the last 2 are smaller than the 

 others and diverge upward. Caudals 4. Close to and outside 

 these series, runs a scries which consists of 19 between pectoral 

 and ventral fin and of 21 behind ventral fin. A subocular 

 photophore located a little behind pupil. Near the anterior and 

 the posterior rim of eye an inconspicuous photophore each ; 

 a rather conspicuous photophore at some distance behind the 

 postorbital one. 



Body scaleless. Lateral line invisible. 



Color in formalin dark brown ; back and belly much dark. 

 All the fins pale. Body including the mandibular barbel with 



