160 K. MITSUKUBI : STUDIES ON 



is rather small and remarkably uniform being ± 0.035 mm. Like 

 Theel, Sluitek and Ludwig, I have been able to detect occasion- 

 ally rosettes which are formed by the combination of C- shaped 

 bodies. In the pedicels, tables with reduced spire and much 

 larger disk than in those in other parts are present. Also large 

 supporting rods with serrated margin and irregular fenestrated ex- 

 pansions, generally on one side of the middle part, are present (e). 



Polian vesicles three. Stone-canal one, attached to the mesen- 

 tery, much meandering in its course, with a large madreporic body. 

 Calcareous ring as figured in textfig. 27a. 



The animal lives in shallow water. The nati^'c name in 



Oshima is " Kuromi-Shikiri " ; this however is equally applicable 



to other black- colored species. 



In the Oshima specimen, a Ficrasfcr came out from the 

 cloaca. 



Localitif : — Zanzibar (Selexka '67); Querimba (Semper '69); Mozambique 

 (Semper '69) ; Sejclielles (Lampert '85) : Dan-os I. (Bell '84) ; Mauritius 

 (Ha.\cke '80, Ludwig '83); ludian Ocean (Ludwig '82); Ceylon (Ludwig '87); 

 Andaman Is. (Bell '87) ; Bay of Bengal (Bell '88) ; Elpliiustone I., Mergui 

 Arch. (Bell '86) ; Nicobar (Théel & Lampert) ; Pulo Tikul (Théel & Lam- 

 pert) ; Pulo Edam (Ludwig '88) ; Java (Sluiter '95) ; Bay of Bata- 

 via (Sluiter '95) ; Sunda Is. (Koehler '95) ; Sebang Ivotang (Sluiter : 01) ; 

 Lumu-Lumu (Sluiter : 01) ; Kaliala dua (Sluiter : 01) ; Karakelang (Slui- 

 ter :01); Sarasa (Sluiter : 01) ; Pepela Bai (Sluiter :01); East Timor 

 (Sluiter : 01) ; Amboina (Sluiter '94, Ivoehler '95, Sluiter : 01) ; Moluc- 

 cas (Semper '67 — 8) ; Macassar (Ludwig '82) ; Lugunor & Gualian (Brandt 

 '35) ; Pelew Is. (Théel k Lampert) ; Ton^es Strait (Kent '93) ; Great Bar- 

 rier Reef (Klnt '93) ; Lifu, Loyalty Is. (Bedford '99) ; Fiji (Semper '67 — 

 8, Théel '86, Lampert '89) ; Samoa (Semper '67 — 8, Lampert '85) ; Tonga- 

 tabu, Friendly Is. (Théel '85) ; Sandwich Is. (Selenka '67); Carolines ; 

 Amami-Osliima. 



