46 



K. MITÖUKUIU : STUDIES ON 



Specimens examined :- 



Description : — Tentacles 20. Body cylindrical, about a foot 

 long, the ventral surface fiat ; the dorsal, convex. Anterior ex- 

 tremity slightly attenuated. Feet less frequent on the dorsal than 

 on tlie ventral surface. The ventral surface ashy white, orna- 

 mented with grayish brown spots and rings around the base of 

 pedicel'^. Dark brown linos dividing tlus surface into small squares 

 most conspicuous on the sides. Uorsiim coffee-brown, with 

 many irregular angular lighter spots. The region a.round the 

 anus as light colored as the ventral. The line dividing the 

 ventral coloration from the dorsal, irregular, broken, marked with 

 angles. Mouth slightly dorsal. Anus slightly inferior. 



The ventral pedicels in three distinct rows in the young. 

 The papillae of the dorsum extraordinarily long and longer than 

 in any holothurian (Sempee). Calcareous bodies small, X-shaped, 

 branched as occurs often in the species of SficJiopus and 

 M'tiUeria, coni})aratively few in number. Polian vesicle and 

 stone- canal one each. With or without Cuvierian organs. The 

 color of the dorsal surface is always well dehiied from that of 



