ANNOTATED LIST. 21 
HIMEROMETRID£E. 
Heterometra crenulata. 
Antedon crenulata P. H. Carpenter. 1882. Jour. Linn. Soc. Zool., 16, p. 507. 
Heterometra crenulata A. H. Clark. 1918. Siboga Comat., p. 79.—See P. H. Carpenter. 1888. Challenger 
Comat., pls. xxxvi, figs. 1-6; xlviii, figs. 3-5, xlix, figs. 1, 2 (as A. variipinna). 
Although this comatulid was taken in Torres Strait by both the Challenger and the 
Alert, neither Semon nor we came across any specimens. The Hndeavour took a fine speci- 
men in 25 to 26 fathoms, 13 miles north by west from Double Island Point, southern 
Queensland. From this, the southernmost point of its range, it extends to Singapore, 
southern China, and the Philippines. It also occurs along the northern and northwestern 
coasts of Australia, and Merton found it common at the Aru Islands. 
Heterometra delicata. 
H. L. Clark. 1915. Carnegie Inst. Wash. Pub. No. 212, p. 105. 
(Plate 21, Figure 6; Plate 36, Figures 4a to f.) 
In his Siboga Comatulids (1918, pp. 62, 63) Mr. A. H. Clark lists this as Zygometra 
punctata, which he adds is a very perplexing and troublesome species. As a matter of fact, 
however, the holotype of this species does not seem to be one of the Zygometride at all. 
There is no trace of zyzygies or pseudosyzygies in thei Br series, but the joints are perfectly 
normal muscular articulations. I Br is not short and band-like, as in Z. punctata, but the 
width is only a little more than twice the length. I Bre (the axillary) is pentagonal, not twice 
as broad as long. The radials are not concealed by the centrodorsal. None of the basal 
segments of the cirri is twice as broad as long. Finally the color is quite unlike Zygometra 
punctata or any other member of that genus; there is no white save on the cirri, which are 
more or less light-colored. This puzzling little comatulid (M. C. Z. No. 587) is very prob- 
ably a young individual not yet revealing its species characters. It may possibly be a young 
Amphimetra. It was found on the sand flat southwest of Friday Island, September 13, 1913. 
Since examining it, Mr. Clark has decided it is “altogether too young for determination.” 
Amphimetra discoidea. 
Himerometra discoidea A. H. Clark. 1908. Smithson. Misc. Coll., 52, p. 215. é 
Amphimetra discoidea A. H. Clark. 1909. Proc. U.S. Nat. Mus., 37, p. 32.—1918. Siboga Comat., p. 87, pls. vi 
(colored), xviii, fig. 35. 
The Alert found this species common in Torres Strait at depths of 7 to 10 fathoms, but 
we did not have the good fortune to meet with it. It ranges from Port Molle, Queensland, 
to Formosa, and also occurs on the northwestern coast of Australia. Merton found it rather 
common at the Aru Islands. 
STEPHANOMETRID£E. 
Stephanometra callipecha. 
Lamprometra callipecha H. L. Clark. 1915. Carnegie Inst. Wash. Pub. No. 212, p. 104. 
(Plate 1, Figure-9; Plate 36, Figures 2a to e.) 
The reéxamination of the holotype of this species, resulting from Mr. A. H. Clark’s 
(1918, pp. 100, 101) assigning it to the synonymy of Lamprometra protecta, leads me to 
believe it should be regarded as a Stephanometra rather than as a Lamprometra, and that 
it is possibly identical with S. indica (E. A. Smith). Unfortunately I have no specimens of 
indica for comparison, but a rereading of Smith’s description shows that it applies to the 
Murray Island comatulid in very few respects. I think, therefore, it will be well to let 
the name callipecha stand. The holotype was found on the southwestern reef at Mer, on 
the last day of our stay, October 27, 1913. It proved to be an active individual and was a 
very graceful swimmer. 
