124 Bvlletin Vanderbilt Marine Micseum, Vol. VII 



curvature of the species, has the abrupt curvature of the proximal 

 portion continued into the slender distal portion. The synarthrial 

 tubercles are present, but are less pronounced than in the larger 

 specimen. The pinnules have the typical structure. The disk is 

 paved with plates, as in the larger specimens. 



The arms of Amphimetra ensifer have a structure similar to 

 that of the better known A. discoidea (A. H. Clark), but the arms 

 of ensifer have a distinguishing characteristic in the synarthrial 

 tubercles which are excessively produced, those of the largest 

 specimen being uniformly as large, or slightly larger than those 

 figured by Mr. Clark for his Singapore type. The proximal pin- 

 nules all have squarish articles and conform to the type descrip- 

 tion in essentials. P^ is slender, 7.1 millimeters long, with 20 

 articles ; PMs 7 millimeters long, less slender, with 17 (rarely 18) 

 articles ; P^ is 5 to 5.5 millimeters long, like P^, but with only 16 

 articles; P* is 5 millimeters long, consisting of 13 articles, less 

 thick than P^ and P% but not so slender as P^ 



References: Himerometra ensifer, Clark, A. H., Proc. Biol. 

 Soc, Washington, D. C, 1908, vol. XXI, p. 225. 



Amphimetra ensiformis, Clark, A. H., Proc. Biol., Washington, 

 D. C, 1909, vol. XXII, p. 7. 



Amphimetra ensifer, Clark, A. H., Bull. LXXXII, U. S. Nat, 

 Mus., 1915, vol. I, Comatulids, pt. I, pp. 141, 255, 285, 328, 

 329, 361; Ibid., text fig. 86, fig. 256, fig. 337, fig. 474; Ibid., 

 vol. I, pt. II, 1921, pp. 26, 29, 72, 104, 216, 228, 595 ; figs. 39, 40 ; 

 Ibid., vol. I, pt. Ill, 1931, p. 32. 



Ophiiiroidea 



Gnathophiurida 

 Family: AMPHIURIDAE 



Genus: AMPHOIDIA Verrill 



Amphiodia ochroleuca (Brock) 



r 



Plates 42 and 43 

 Type: Mr. Brock founded this species on a single specimen 

 from Amboina, deposited in the Gottingen Museum. 



