182 the apodous holothurians 



Aphelodactyla punctata. 

 HapJodartijhi panciata Sluiter, ISSS, |). 2(10. CaleareoTis particles, pi. ii, figs. 31-35. 



Length. — Up to 160 mm. 



Color. — Clear violet with orange blotdies and spots; tentacles colorless, 

 speckled with orange. 



Distribution. — Eeported only from Batavia Bay and Samana Bay, D. E. T. 

 (Sluiter). 



Remarks. — Thanks to Sluiter's ('88) investigations, we really know some- 

 thing ahout this species, which appears to be distinct from molpadioides, 

 though a sufficient series of specimens may show that the two are identical. It 

 is common in the mud of Batavia Bay, where it lives with only the cloacal 

 opening above the surface. It lives well in an aquarium, but remains buried 

 in the mud, showing the anterior end only at night. Respiration is slow, the 

 contractions and expansions of the cloaca only occurring two or three times per 

 minute. The calcareous deposits show a great deal of diversity in form. 



Aphelodactyla australis. 



Haploihirtjiln Jiolotliiiriuides f^eleuka {]\n]i Cuvier). 18(58, p. 115. Calcareous par- 

 ticles, pi. viiL figs. 13, 14. 

 HapJodaclyla audralis Semper, 1868, p. 233. 

 Haplodadi/la andamanensis Bell, 1887a, p. 139. 



Length. — 75-105 mm. 



Color. — Coffee-brown, dusky brown, or reddisli gray. 



Distribution. — Reported from Waigiou, northwest of New Guinea 

 (Selenka); Timor and Padang (Ludwig) ; Andaman Islands (Bell), and Cey- 

 lon (Thurston, Ludwig). Apparently the most widely distributed of the genus. 



Remarks. — Very little is known of this species, beyond the existence of a 

 few specimens in European museums. I follow Ludwig in considering anda- 

 manensis synonymous w^ith australis, as he has examined several specimens and 

 his long experience makes him a safe guide; but the differences between 

 australis and molpadioides are not much greater than those which were sup- 

 posed to separate australis and andamanensis, so I am by no means sure that 

 the present species is tenable beyond question. 



Aphelodactyla pelluctda. 



HapJodadyla molpadioide.t pelluctda Semper, 1868, p. 43. Anatomical details, pi. x. 



figs. 1, 3, 6. 

 Haplodactyla pellucida Sluiter, 1901, p. 117. 



Length. — 40-75 mm. 



Color. — Not given; "glassy, transhicent" (Sluiter) ; Semper figures (Plate 

 X, fig. 3) a bright brownish-yellow pigment cell from the skin. 



