148 



HOLOTHURIANS. 



9. Holothuria cineruscens Brandt. 



Holothuria pulchella Selenka. E. Selenka. Z. f. w. Z. 17, 1867, p. 329, Taf. xvm. 

 figs. 61, 62. 



References: C. Semper. Reisen Philipp. Hoi. 1868, p. 89. 

 K. Lampert. Die Seewalzen, 1885, p. 82. 

 H. Ludwig. Z. £ w. Z. 35, 1881, p. 597. 

 Loc. New Caledonia. 



Several specimens from 8 cm. up to 13'5 cm. in length. 



The majority have a black ground colour on which the chestnut-coloured papillae 

 and tube-feet stand out, each surrounded by a lighter space ; in one specimen the 

 brown colour is replaced by grey. Deposits quite typical. 



Table of Variations. 



10. Holothuria willeyi n. sp. PI. XVII., Fig. 6 a, b, c. 



Reference: v. H. Ludwig. 22 Ber. d. Oberh. Gesell. f. Nat. Giessen, 1883, p. 171. 

 H. moebii, and also references to H. cinerascens. 

 Loc. Blanche Bay, New Britain. 



Two specimens 2'2 cm. and 1"7 cm. in length in spirit; tentacles retracted; number?; 

 colour in spirit light grey-brown with darker mottlings; tube-feet in 3 distinct rows 

 on ventral surface ; papillae (?) on dorsal surface much smaller and scattered ; feet 

 and papillae dark ; deposits consist of tables and rods, besides the end-discs of the 

 ventral feet. Tables are very infrequent ; disc as in H. cinerascens, but spire reduced 

 ending frequently in 3 or 4 points as in H. pervicax ; the rods are of two kinds : — 



(1) curved granulated rods exactly like those of H. cinerascens up to , 125mm. long; 



(2) smooth rods unbranched up to - 1 mm. long as in H. moebii. No H-shaped 

 deposits. 



Calcareous ring as figured (the top of the figure being posterior). One Polian 

 vesicle ; 6 stone-canals in a group ; no Cuvierian organs. 



The two specimens seem to agree in all respects and the species is undoubtedly 

 allied to Holothuria cinerascens and Holothuria moebii; judging from the observations 

 of Prof. Mitsukuri on Stichopus japonicus (Ann. Zool. Jap. Vol. 1, 1897) we might 



