72 PROCEEDINGS OF THE ACADEMY OF [April, 



in a point and with smaller ones on each side. Scales at extreme end of 

 snout granular, and without any keel. Lateral line distinct, 



Male copulatory organ large, with a hook-like appendage near 

 extreme end on inner side, and with another hook on outer side 

 proximally to the former. 



Three specimens were examined, two males bought at the Tokyo 

 market, and said to have been caught in the Sagami Bay, and a single 

 female from Kagoshima. They are in the Imperial Museum of Tokyo. 



The proportional lengths of different parts in a male specimen are 

 as foUows: 



6^ 



Total length 700 mm. 



Snout to nostril 42 " 



Snout to first gill-slit 120 " 



Snout to mouth 75 " 



Nostril to mouth 30 " 



Mouth to anus 276 " 



Diameter of body at first gill-slit 74 " 



Diameter at spiracles - . . . . 73 " 



Length of upper caudal lobe 132 " 



Length of lower caudal lobe 72 " 



Base of first dorsal 30 " 



Height of first dorsal 39 " 



First dorsal to ventral 43 " 



Base of second dorsal 24 " 



Height of second dorsal 26 " 



Second dorsal to upper caudal lobe 73 " 



Length of pectoral 88 " 



Breadth of pectoral 60 " 



Eye to dorsal end of first gill-slit 44 " 



Distance between nostrils 33 " 



Gape 36 '' 



Length of eye 26 " 



Length of oral groove 24 " 



Deepest part of oral groove 8 " 



Snout to eye 50 " 



First dorsal spine to second dorsal spine 230 " 



Eye to first gill-slit 45 " 



Snout to first dorsal spine 220 " 



Length of first dorsal spine 38 " 



Dorsal margin of dorsal fin 63 " 



Length of second dorsal spine 49 " 



Dorsal margin of second dorsal fin 47 " 



General Considerations. — Judging from the very scanty literature we 

 have, I am inclined to consider the present species to come nearest to 



