32 



K. MITSUKURI : STUDIES ON 



Description : — " Body elongated, almost cylindrical, probably 

 slightly flattened on the ventral surface. Mouth bent toward the 

 ventral surface ; anus almost terminal. Ventral surface with 

 three series of pedicels, the middle one forming a thin double 

 row, the two lateral a simple zigzag row. Eacli of the two dorsal 

 ambulacra with a narrow double row of small conical papillae. 

 The two dorsal interambulacra carry a number of low whitish 

 warts ; the ventral surface also contains such warts though more 

 sparingly. A crown of small papillae surrounds the mouth. Ten- 

 tacles about seventeen (?). Body-wall thin and pliable, supported 

 by tables of a characteristic form ; the disks are cross- or star- 

 like, with from four to eight arms radiating from a common 

 centre, and with the ends of the arms enlarged, flattened, and 

 pierced with holes ; sometimes the enlarged ends of some or all 



