170 SPOLIA ZEYLANICA. 



resembles that found in AcUnopyga. Spicules in general similar 

 to those of AcUnopyga. 



Five species : — 



Bohadschia marmorata (Jager), Bohadschia argus (Jager), 

 Bohadschia vitiensis (Semper), Bohadschia paradoxa 

 (Selenka), Bohadschia gr'dffei (Semper). 



Sub-genus Aegiodia.* Sub-gen. nov. 



(= Mulleria, Jager, 1833, partim ; Microthele, 

 Brandt, 1835, partim.) 



Twenty tentacles. Ambulacral appendages, papillae on 

 the bivium and pedicels on the trivium ; no arrangement into 

 rows discernible. Anal teeth present. Calcareous ring 

 having no well-marked ampullary notches. The anterior 

 border deeply concave between the radials and inter-radials. 

 Spicules well-developed and consist of tables and buttons. 



Four species : — 



Argiodia maculata (Selenka), Argiodia parvula (Selenka), 

 Argiodia excellens (Ludwig), Argiodia flavo-castanea 

 (Theel). 



Sub-genus HALODEiMA.f Sub-gen. nov. 



(= Holothuria, Linn, partim ; Microihele, Brandt, 1835, 



partim ; Sporadipus, Brandt, 1835, partim ; 



Trepamj, Jager, 1833, partim ; 



Cystipus, Haacke, 1880.) 



Generally twenty tentacles, occasionally more or less. 

 Ambulacral appendages, papilljB on the bivium and pedicels 

 on the trivium. Generally no arrangement into rows discern- 

 ible. Anal teeth absent. Calcareous ring having no ampul- 

 lary notches. The anterior border deeply concave between 

 the radials and inter-radials. Spicules rarely perforated, 

 plates only, or tables only. Generally tables and perforated 

 plates or buttons. 



* dpYl6Bou<; = with white teeth. 



t aXB<; = the sea: BsE^JLa = monster. 



