ANNOTATED LIST. U7 
In the dry material, the markings on the specimen figured have entirely lost their yellow 
color and are dirty whitish, while the ground-color no longer has a yellow tinge but is 
dull blackish-brown. The type locality for obscura is Singapore, and the only other record 
J have found is Bell’s (1894) from northwestern Australia, 9 fathoms. There is a specimen 
in the Museum of Comparative Zoédlogy from Port Galera, Mindanao, Philippine Islands, 
which is 18 mm. across the disk; the color is uniformly nearly black. 
Ophiothela dane. 
Verrill. 1869. Proc. Boston Soc. Nat. Hist., 12, p. 391.—Déderlein. 1896. Jena. Denkschr., 8, pp. 297, 486, 
pl. xvii, figs. 25-25b; pl. xxxvii, figs. 3-3c. 
Déderlein has referred to this species the Ophiothelas collected by Semon on gorgonians 
in Torres Strait, expressing himself as doubtful regarding the validity of the various 
6-armed species which have been described. The question he has raised requires the care- 
ful study of more material than is at present available, but I am inclined to think the genus 
contains at least half a dozen valid species. Koehler (1905), however, is strongly inclined 
to Déderlein’s view and is particularly sure that dane and isidicola are identical, as de 
Loriol (1894) long ago suggested, while Matsumoto (1917) holds that there is no doubt of 
the identity of dane, isidicola, and verrilli. Whether the specimens from Torres Strait, 
which Déderlein has referred to dana, are really that form can not be positively settled 
from the photographs, but at least they do not seem to be the following species. The Fiji 
Islands are the type locality for dane; it is also recorded, however, from the East Indies, 
Philippines, and southern Japan. 
Ophiothela hadra. 
H. L. Clark. 1915. Mem. M.C. Z., 25, p. 284, pl. 14, fig. 2. 
(Plate 13, Figure 5.) 
The holotype of this species was found on a sponge brought up by the Japanese diver 
from 18 fathoms off the northwestern coast of Mer. Its appearance in life was very mark- 
edly different (pl. 13, fig. 5) from that of the preserved specimen, as the yellow and green 
tints have quite disappeared; the disk is now nearly white, with several pale rose-colored 
blotches, and the arms are banded with dull gray and reddish. 
Aside from this specimen taken at Mer, the only specimens of hadra known are those 
taken by the Endeavour, 11 miles southeast of Ballina, New South Wales, in 27 to 28 
fathoms. These swarmed on the big spines of the sea-urchin Prionocidaris australis, and 
in their dry condition are notable for their pink and blue coloration. It is hard to believe 
that in life the prevailing colors should have been yellow and greenish. 
Ophiophthirius actinometre. 
Déderlein. 1898. Jena. Denkschr., 8, p. 486, pl. xxxvii, figs. 4—4c. 
This curious little brittle-star was discovered among the cirri of Comatula solaris 
brought from Thursday Island by Semon. As we did not find solaris in Torres Strait, we 
were disappointed in not finding Ophiophthirius. Matsumoto’s (1917) suggestion that the 
genus may be based only on very young specimens of Ophiomaza seems to me a good one 
and I believe that such will ultimately prove to be the case. 
OPHIOCHITONIDE. 
Ophionereis porrecta. 
Lyman. 1860. Proc. Boston Soc. Nat. Hist., 7, p. 260.—1865. Illus. Cat. M. C. Z., No. 1, p. 147, figs. 14, 15. 
(Plate 12, Figure 6; Plate 33, Figures 2 and 3.) 
The distribution of this fine brittle-star is very remarkable and the limits are still un- 
determined, but there is no doubt that the types came from the Pacific Ocean, although in 
the original description, after stating that the label has been lost, Mr. Lyman gives “ Flor- 
