A. H. CLARK : THE CRINOIDS OF THE INDIAN OCEAN. 233 



PEROMETRA AFRA. 

 Perometra afra 1911. A. H. Clark, Proc. U. S. Nat. Mus., vol. 40, p. 43. 

 Habitat. Providence Island, norfch-east of Madagascar. 

 Depth. — 1 l>.5 fathoms. 



PEROMETRA DIOMEDE^. 



Antedon diomedece 1907. A. H. Clark, Proc. U. S. Nat. Mus., vol. 33, p. I4n. 

 Perometra diotnedece 1907. A. H. Clark, Smiths. Miscell. Coll. (Quarterly Issue), 



vol. 50, part 3, p. 3.58. 



Habitat. — Southern Japan. 



Depth. — .51-110 fathoms. 



PEROMETRA PUSILLA. 



Antrdon i)ii>iiUa ISHR. P. H. Carpenter, "Challenger" Reports, vol. 26, Zof)- 



logy, p. 131, pi. .\xiii, fig. 1. 

 Perometra pusilla 1911. A. H. Clark, Proc. U. S. Nat. Mus., vol. 39, p. ")()!. 



Habitat. — Ki Lslands. 



Depth. — 140 fathoms. 



Remarks. — This species differs markedly from P. diomedece in possessing 

 Po, as I discovered upon examining the type in the British Museum ' ; the synar- 

 thrial tubercles are also much more strongly developed than in specimens oi 

 P. diomedece of equal size. 



Genus ERYTHROMETRA. 



Erythrometra 190S. A. H. Clark, Proc. Biol. Soc. Washington, vol. 21, p. 12(5 

 (Antedon ruber A. H. Clark, 1907). 



ERYTHROMETRA RUBER. 



Antedon ruber 1907. A. H. Clark, Proc. U. S. Nat. Mus., vol. 33, p. 146. 

 Erythrometra ruber 1908. A. H. Clark, Proc. Biol. Soc. Washington, vol. 21. 



p. 12(). — 1909. Vidensk. Medd. fra den naturhist. Foreninn; i Kobenhavu. 



1909, p. 190. 



Habitat. — Southern Japan. 



Depth. — 55-105 fathoms. 



Subfamily ZENOMETRINjE. 

 Zenometrince 1909. A. H. Clark, Proc. Biol. Soc. Washington, vol. 22, p. 176. 



I Ct. Proc. U. S. Nat. Mus., vol. 39, p. .562. 



