666 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



54. MOBULA JAPONICA (Miiller and Henle) . 



ITOMAKI-EI (SPOOL RAY). 



Cephalnptera japonica Mfi.ler and Henle, Plagiostonien, 1836, p. 185; Nags. 



saki. — SciiLEGEL, Fauna Japonica, 1850, p. 810; Nagasaki.- — Dumeril, Elas 



mo])ranches>, 1870, p. 659 (after Miiller and Henle). 

 Dicerobatis japonica Gunthek, Cat. Fish, VIII, 1870, p. 496 (after Miiller aii' 



Henle). 



Teeth very minute, obtuse tubercles, extending laterally to thil 

 angles of the mouth. Back rough. Tail nearly thrice as long a 



J -v 



T 



I 



j^ 



Fig. 10. — Morula .i.\p<>ni(a (from a fd-tiis). 



body. On each side of tail, a series of small, white tubercles. 

 (Giinther, after Midler and Henle.) 



Coasts of Japan, occasionally taken. A fetus, 22i inches long, was 

 ()])tained by us from Kumakichi Aoki of ^Nli.saki. Two mounted speci- 

 mens are in the nuiseum at Hakodate, both from Volcano Bay. The 

 largest is 8 feet across, the tail about twice the length of disk, which 

 is a little more than twice as broad as long. 



