74 K. MITSUKITJ : STUDIES ON 



three teeth each. Eods (/,.'/) are very numerous, shghtly curved, 

 lincly granular all over, and more or less irregular at the two 

 extremities. 



When the stretched skin of the dorsum is viewed from the 

 inside, many black spots are visible ; they are smaller and far more 

 numerous than the l)lack spots visible from the outside. 



Pedicels very numerous on the ventrum. Papillae of the 

 dorsum (some with no end-plates, others with well-developed end- 

 plates) more sparse. No other kind of supporting rods than the 

 finely granulated curved rods. No Cuvierian organs found, at 

 least in those examined. Calcareous ring as in textfig. IGa. There 

 are 5 — 12 appendages to the ring canal ; it was very difficult to 

 determine how many of these were Polian vesicles and how many 

 stone-canals, for they have almost the same shape. In one 

 specimen, there was a tube branched into one short and two long 

 fingerlike blind tubes, which seemed to be a branching Polian 

 vesicle. 



The largest individual in well extended state measured 15 

 cm. in length. 



LocalUij :— Kosseir (Lampeijt '85) ; Zanzibar (L\MrERT '8G) ; Tumbatu 

 (Lampekt '96) ; IMozambiqiif) (Semper '67— '68) ; Mamitius (Haacke '69, 

 LuDWiG '83) ; Reyclielles (LAMrERT '85, LuDWffi '99) ; Ceylon (Bell '87) ; 

 Java (Semper '67— '68) ; Batavia Bay (SLurrER '87) ; Suuda Is. (Semper '67 

 — '68) ; Suiula Strait (Sluiter '95) ; Seba (Savu) (Sluiter : 01) ; Koma 

 (Sluiter : 01) ; Bai von Pidjot, Lombok (Sluiter : 01) ; Camiguiu (Semper 

 '67 — '68); Ogasawara Is. (Brandt '35); Euosliima (v. MjUIENZEIXER '81); 

 New Caledonia (Bedford '99) ; Sandwich Is. (Selenka '67) ; Honolulu 

 (LuDWiG '87) ; Tahiti (Theel '86) ; Marquesas (Theel '86) ; Ogasawara Is. ; 

 Liu-Kin ; Satsnma. 



