A. H. CLARK: THE CRINOIDS OF THE INDIAN OCEAN. 113 



p. 32. — Vidensk. Medd. fra den naturhist, Forening i Kobenhavn, 1909. 



p. 157. 

 Amphimetra discoidea 1909. A. H. Clark, Proc. U.S. Nat. Mus., vol. 37 > 



p. 32. — Vidensk. Medd. fra den naturhist. Forening i Kobenhavn, 1909, 



p. 158. 



Habit.\t. — Northwestern, northern, and northeastern Australia, and north- 

 ward to Singapore, Formosa (Taiwan), and the Philippine Islands. 



Depth. — Littoral, and down to 20 fathoms. 



AMPHIMETRA ENSIFER. 



Himerometra ensifer 1908. A. H. Clark, Proc. Biol. Soe. Washington, vol. 21, 



p. 225. 

 Amphimetra oisifoimds 1909. A. H. Clark, Proc. Biol. Soc. Washington, 



vol. 22, p. 7. 

 Amphimetra ensifer 1909. A. H. Clark, Vidensk. Medd. fra den naturhist 



Forening i Kobenhavn, 1909, p. 158. 



Habitat. — Singapore. 



AMPHIMETRA DENTICULATA. 



Antedon denticulata 1888. P. H. Cabpenter, " Challenger " Reports, vol. 26, 



Zoology, p. 130, pi. xxii, figs. 1, 2. 



Habitat. — Arafura Sea. 



Depth. — 49 fathoms. 



Remarks.— An examination of the type of this species at the British 

 Museum has shown that it belongs to the genus Amphimetra instead of to Nano- 

 metra as I had previously supposed. 



AMPHIMETRA PINNIFORMIS. 



Antedon pinniformis 1881. P. H. Carpenter, Notes from the Leyden Museum, 



vol. 3, p. 180. 



Habitat. — Andai, New Guinea. 



Remarks. — This is a small species of Amphimetra^ belonging to the milberti 

 division of the genus, though heretofore on the basis of Carpenter's description 

 it has always been assigned to the genus Oligometra. The cirri are moderately 

 stout, tapering slightly in the distal half, with all the segments subequal, all 

 about twice as broad as long, those in the proximal half slightly longer, those in 

 the distal half slightly shorter. The synarthrial tubercles are small but rather 

 prominent, resembling those in specimens of Amphimetra discoidea from Port 

 Molle. P.^ is long and stout, much larger than the small and weak P, : P^ is 

 similar to P.^ and nearly as long and stout : the following pinnules are small and 

 weak. The cirri are XII, 25 ; the dorsal spines are sharp and moderately long. 



