202 



K. MITSUKURI : STUDIES ON 



Description : — Body elongated, of almost equal breadth tlirougli- 

 out, the length of largest alcoholic specimens being 120 — 100 mm. 

 and the width 35 — 40 mm., about 3—4 times as long as 

 broad. Mouth anterior, subventral. ^Vnus posterior, subdorsal. 

 Tentacles 15, with large circular discoidal ends ; on the wliole, 

 the ventral tentacles smaller than tlie dorsal. The odd ventral 

 ambulacrum naked. Pedicels of each lateral ambulacrum 22 — 25 ; 

 the alternate arrangement of pedicels in the inner and outer 

 rows of each ambulacrum very obvious in some specimens, but 

 hardly recognizable in others, tlie difference being jjrobably due 

 to the degree of contraction in alcoholic specimens. Processes of 

 each of the dorsal ambulacra very numerous, conical, rather short, 



