A. H. CLARK: THE CEINOIDS OF THE INDIAN OCEAN. 107 



Habitat. — Southern Japan. 

 Depth. — 36-100 fathoms. 



CATOPTOMETRA K(EHLERI. 



t. Anted 0)1 ram 1907. A. H. Clark, Proc. U. S. Nat. Mus., vol. 33, p. 72. 

 Zygometra hxehleri 1907. A.H.Clark, Smiths. Miscell. Coll. (Quarterly Issue), 



vol. 50, part 3, p. 339. 

 Gatoptometra hMeri 1908. A. H. Clark, Proc. U. S. Nat. Mus., vol. 34, p. 317. 



Habitat. — Southern Japan. 



Depth. — 03-100 fathoms. 



Family HIMEROMETRIDiE. 



Himerometrid,,' (part) 190,s. A. H. Clark, Proc. U. S. Nat. Mus., vol. 36, p. 211. 

 Himerometrina' 1909. A. H. Clark, Proc. Biol. Soc. Washington, vol. 22, p. 175. 



Genus AMPHIMETRA. 



Amphiinetra 1909. A. H. Clark. Proc. Biol. Soc. Washington, vol. 22, p. fi 

 (Comatula lAlecto) milberti J. Miiller, 1846). 



AMPHIMETRA PHILIBERTI. 



Comatula philiberti 1849. J. MUller, Abhandl. d. k. preuss. Akad. d. Wiss., 



1847, p. 259. 

 Amphimetra niorte/nseni 1909. A. H. Clark, Proc. U. S. Nat. Mus., vol. 36, 



p. 635. 



Description. — Centrodorsal thick discoidal, the bare polar area flat, 4 mm. 

 or o mm. in diameter ; cirrus sockets arranged in two closely crowded alternating 

 marginal rows. 



Cirri XVIII-XX, 30-42 (usually about 35), 25 mm. to 3U mm. long; first 

 segment short, about three times as broad as. long, second and third about twice 

 as broad as long, the following gradually increasing in length to the ninth or 

 tenth, which is nearly, though never quite, as long as broad ; next five to seven 

 segments similar, the following gradually decreasing in length, in almost the 

 whole of the terminal half of the cirru.s being about one half again as broad as 

 long : from the twelfth or fourteenth onward sharp median tubercles or small 

 spines are developed on the dorsal side of each segment, those on the last few 

 segments occupying a position slightly proximal to median ; opposing spine much 

 larger than the processes on the preceding segments, triangular, the apex median, 

 arising from very nearly the whole dorsal sui'face of the penultimate segment, 

 equal to about half the lateral diameter of that segment in height ; terminal 

 claw longer than the penultimate segment, moderately stout basally but gradually 

 becoming slender distally, moderately curved. 



