b AJIT. 11. — S. TANAKA. 



below the posterior margin of the eye, there branch off a maxillo- 

 mandibular and a jugular branch sometimes at the same point (PL 

 II., fig. 15), at other times the latter from the former (PL II., fig. 

 12), and at still other times the two separately from the suborbital 

 (PL II., figs. 13 and 14). This variation may go so far that 

 in one and the same individual the two branches, the jugular and 

 the maxillo-mandibular, may arise at the same point on one side, 

 while on the other side, the origin of the jugular may be shifted 

 a greater or less distance along either the suborbital or the 

 maxillo-mandibular branch as mentioned above. In phantasma 

 and mitsukurii such variations seem never to occur. The origin 

 of the jugular seems to be constant for each of the species. In 

 Phantasma it arises always from the suborbital (PL II., fig. 6), 

 while in mitsukurii it is given off invariably from the maxillo- 

 mandibular (PL II., fig. 16). So far as I was able to examine 

 specimens of jordani, I came to the conclusion that in this species 

 the points of origin of the maxillo-mandibular and of the jugular, 

 whether the latter arises from the former or directly from the 

 suborbital, are considerably nearer each other than in phantasma 

 or in mitsukurii (cf. PL II., figs. 6, 12, 13, 14, and 16). In- 

 dividual ^differences with respect to this part of the sensory 

 canal system I have observed in purpurascens also (PL II., figs. 

 I and 5). 



Color in formalin uniformly dark brown ; as Mr. Owston 

 tells me, a female when brought in by a fish-monger was beauti- 

 fully iridescent ; one indistinct pale line above the lateral canal 

 and three indistinct pale lines below it run parallel to one an- 

 other in the posterior part of the body ; posterior margin of 

 the pectoral and ventral fins blackish ; free margins of all other 

 three fins with a more or less broad blackish band ; color of second 



