12 AßT. 7. — S. TANAKA : 



base Is in head, inclusive of base IL Second dorsal rises 

 rather rapidl}^, reaching its greatest height behind tip of pectoral, 

 when the height measured perpendicular to base is. 7* in head ; 

 its margin even, nearly straight, its posterior angle rounded where 

 it makes a deep dorsal notch, but not cleft to base of fin. 



Upper lobe of caudal slightly higher than the lower ; both 

 lobes very low and like Chimcera 2)hantasma in height and form ; 

 height of the upper lobe measured perpendicular to its base 17 

 times in head ; the lower lobe extends more posteriorly behind 

 the upper lobe. No distinct anal fin, the fin on lower side of 

 tail gradually diminishing in height anteriorly without a notch. 



Caudal produced to a rayless filament ; distance from dorsal 

 notch to end of caudal filament (the end of filament is a little 

 incomplete) about 2 in body exclusive of head and the parts 

 behind dorsal notch ; in this proportion agreeing with Chimœra 

 Phantasma. 



Pectoral pointed and slightly falcate, with a deep notch at 

 its lower insertion into the fleshy base, the lower angle of its 

 posterior margin broadly rounded ; its tip when depressed reaches 

 to the middle part of the ventral fin. Insertion of the ventral 

 fin midway between tip of head and dorsal notch, its posterior 

 margin subtruncate, the external angle of the margin acute, but 

 the inner angle of the margin rounded. Distance between origin 

 of second dorsal and upper end of insertion of pectoral a little 

 shorter than that between the latter and the insertion of ventral, 

 but slightly longer than the distance between lower end of 

 insertion of pectoral and the insertion of ventral. 



Cephalic organ directed forwards and downwards, situated 

 on snout in front of eye, its length 2 in eye, 7 in head ; on its 

 lower side about thirty-five recurved spinous denticles. Clasper 



