1898.] FROM rUXAFUTI AND EOa'UMA. - 847 



japonica. Calcareous ring consists oE 12 pieces, 5 radial and 7 

 interradial, the latter being arranged symmetrically on each side 

 of the dorso-venti-al line (1 in each ventral interradius, 1 in 

 mid-dorsal interradius, and 2 in each dorso-lateral interradius) ; 

 the 5 radial pieces are each pierced by a hole (or seldom notched 

 as in 0. Uberata). Several Polian vesicles (about 5) and a single 

 stone-canal fixed to mesentery occur. 



Synapta GODErFROYi Semper. 



(G-enus Euapta Ostergren), C. Semper, Eeisen im Arch. Philipp. 

 Bd. i. Hoi. p. 231, Taf. xxxix. fig. 13. 



Reference. C. Ph. Sluiter, Semon's Zoo). Forsch. in Austr. u. 

 Mai. Arch. Bd. v. Lf. 3, 1894, p. 105. 



Bistrihution. Mauritius, Pelew Is., Thursday Is., Fiji, Samoa, 

 Cai'oline Is. ; it thus ranges over a considerable part of the Indo- 

 Pacitic region. 



Two specimens from Eotuma : largest 180 mm. x 13 mm., 

 length of tentacles about 13 mm. ; 15 tentacles. 



Deposits &c. agree with description and figures by Semper, but 

 the malformations of the anchors did not seem to occur (c/. Sluiter); 



Two smaller specimens from Eotuma, one of which is 35 mm. x 

 5 mm., appear to be the young of this species : the tentacles I am 

 unable to count because of their condition, but the deposits agree 

 exactly with the larger forms ; colour is different, the body being 

 speckled with silver-grey markings. 



Synapta kefersteini Selenka. 



(G-enus Chondrodea Ostergren), E. Selenka, Z. f . w. Z. xvii. 1867, 

 p. 360, Taf. XX. figs. 120, 121. 



References. C. Semper, Eeisen im Arch. Philipp. Bd. i. Hoi. 

 pp. 14, 15, Taf. V. fig. 24, p. 230, Taf. xxxix. fig. 11. 

 H. Ludwig. Zool. Jahrb. iii. Syst. 1888, p. 818. 

 C. Ph. Sluiter, Semon's Zool. JForsch. in Austr. u. Mai. 



Arch. Bd. v. Lf. 3, 1894. 

 H. Ostergren, Ofvers. af Kongl. Vet.-Ak. Forhand- 

 lingar, Arg. Iv. No. 2, 1898, p. 111. 

 Distribution. Eecorded from Sandwich Is., Samoa, Amboina, 

 and Kosseir (Eed Sea). 



Two specimens (one imperfect) from Eotuma, one 70 mm. ;< 

 10 mm. 



Ludwig (I.e.) notes the variation in number of tentacles in this 

 species. In these specimens there are 25 in each specimen. 



I have nothing to add to the description of Selenka and Semper, 

 revised by Ludv\dg : in Ludwig's specimens the seventh hole of the 

 anchor-plates has a dentate margin, whereas in those examined by 

 Selenka and Semper the margin appears to have been smooth : 

 these specimens are interesting in the fact that they possess 

 anchor-plates of both kinds, intermediate conditions of all grades 

 being very common. 



