118 THE APODOTJS HOLOTHURIANS 



COLOR. Eed of some shade, ranging from reddish brown and reddish pur- 

 ple to rose-red ; tentacle r ivhitish ; wheel-papillae white. 



DISTRIBUTION. Reported from Bohol, Philippines (Semper) ; Bay of Ba- 

 tavia, Kur-reef, Lueipara and Binongka, D. E. I. (Skater) ; Pulo Edam and 

 Amboina (Ludwig) ; Rotuma and China Straits, New Guinea (Bedford) ; and 

 Hawaiian Islands (Fisher). Apparently well distributed throughout the entire 

 East Indian region. 



REMARKS. Since Sluiter 's description of liber ata is obviously erroneous 

 (he speaks of three ventral interradii), it is evident that his specimens were 

 very similar to rigida, and as they were quite small, there can be little doubt 

 that they were young ones of that species. Ludwig 's amboinensis is appar- 

 ently well within the limits of variation which such a species as rigida com- 

 monly shows and cannot be distinguished therefrom, and the same appears 

 to be true of Fisher's hatvaiiensis . This species occurs around coral reefs, 

 either among the dead (less commonly, the living) corals or in holes in the 

 blocks of coral rock. 



CHIRIDOTA INTERMEDIA. 

 Chiridota intermedia Bedford, 1899&, p. 846. Calcareous particles, pi. LTII. fig. 6. 



LENGTH. 20-30 mm. 



COLOR. Whitish, transparent posteriorly. 



DISTRIBUTION. Reported only from the Mangrove swamp, Funafuti (Bed- 

 ford). 



REMARKS. Although this species is strikingly like a young rigida, the un- 

 usual habitat and the pale color make it seem probable that it is really quite 

 distinct. Bedford says that the C-shaped calcareous particles rarely become 

 S-shaped, "a condition which is normal in C. contorta," etc. No ordinary 

 change of form would in itself make the calcareous particles of rigida (Plate 

 VII, fig. 27) and intermedia like the sigmoid bodies of Tceniogyrus (Plate VII, 

 figs. 9-11) ; these latter are an entirely distinct sort of calcareous deposit. 



CHIRIDOTA PISANII. 



Chirodota pisanii Ludwig, 18866, p. 29. Calcareous particles, pi. n, fig. 14. 

 Chirodota purpurea Theel,.1886a, pp. 15 and 35. Calcareous particles, pi. n, fig. 1. 

 Chirodota purpurea Lampert, 1889&, p. 851. 

 Chirodota pisanii Lampert, 1889&, p. 851. 

 Chiridota pisanii Ludwig, 1892&. 



LENGTH. 30-130 mm. 



COLOR. Red of some shade, varying from dark purple-red to rosy-white; 

 the color becomes either intensified or bleached in alcohol; the longitudinal 

 muscles sometimes show through as white stripes. 



