A. H. CLARK : THE CRINOIDS OF THE INDIAN OCEAN. 175 



Depth. — Littoral, and down to 39 fathoms. 



Remarks. — In London T was able to examine the specimens upon whioli the 

 record of OUgometra serri pinna in north-western Australia was based, and T found 

 that they were in reahty, as I had long suspected, examples of 0. carpenteri. 



OLTGOMETRA JAPONICA. 



Antedon japonira IHQQ. Hartlaub, Nachr. Ges. Gottingen, Mai 1890. p. 172. 



— 1891. Nova Acta Acad. German., vol. 58, Xo. 1, p. 84, pi. 4, fig. 49, 

 OUgometra japonira 1908. A. H. Clark, Proc. Biol. Soc. Washington, vol. 21, 



p. 126 (but not Proc. U. S. Nat. Mus,, vol. 34, p. 308). 



Habitat.— Southern Japan ; Philippine Islands. 



Depth. — 5.5-58 fathoms. 



OLIGOMETRA ADEON^. 



Comatida (uleoncB 1816. Lamarck, Hist. nat. des aniraaux sans vertebres, vol. 2, 



p. 535. 

 Antedon hidens 1884. Bell, Report Zool. Coll. H.M.S. "Alert," p. 158, pi. xi, 



figs. A a^c. 

 OUgometra adeonce 1908. A. H. Clark, Proc. Biol. Soc. Washington, vol. 21, 



p. 126. 



Habitat. — ' ' Australia ' ' ; Queensland ; northern Australia ; Torres Strait ; 

 Thursday Island : Baudin Island ; north-west Australia. 



Depth. — Littoral, and down to 15 fathoms. 



Remarks. — ^An examination of the types of Comatula adeonm at Paris and 

 of ^??iefZow 6 jfZews at the British Museum has shown that in reality the two are 

 the same species. The " Alert " collection contains specimens identified both as 

 " Antedon adeonce " and as " Antedon hidens." The only adequate figure of the 

 species yet published is that given by Doderlein. 



OLIGOMETRA THETIDIS. 



OUgometra thetidis 1909. H. L. Clark, Memoirs Australian Museum, iv, p. 522, 

 pi. xlvii, figs. 1, 2, 3. 

 Habitat. — South-eastern AustraHa. 

 Depth. — 55-56 fathoms. 



OLIGOMETRA CALEDONIA sp. nov. 



Description. — Cirri XI. lS-19, very short, rather stout, resembling tho.se of 

 0. serripinna: first segment about twice as long as broad, the following verv 

 gradually increasing in length so that the eleventh to the tliirteenth and following 

 are about as long as broad ; on the fifth the distal dorsal edge becomes slightly 



