ANNOTATED LIST. 113 
that neither the Alert, the Challenger, nor Dr. Semon found this species in Torres Strait, 
nor did we find it anywhere but at the Murray Islands. It is, however, common at the 
Aru Islands. 
Ophiothrix propinqua. 
Lyman. 1861. Proc. Boston Soc. Nat. Hist., 8, p. 83.—Koehler. 1898. Bull. Sci., 31, pl. 3, figs. 20-22. 
This species has a wide range, from Zanzibar to the Gilbert Islands, and is common 
all through the East Indies. It occurs at Sharks Bay, northwestern Australia. The specific 
characters are well-marked, but show some diversity, and there is considerable diversity 
in color, especially in the amount of reddish brown shown by the living animal. On the 
reef-flats at Mer propinqua was quite common, but not at all abundant. It is very secretive 
and is generally found concealed in some cranny or cavity of a coral-rock fragment. In 
life it may easily be confused with small specimens of O. longipeda, but it seems always to 
lack the purple spotting of that species, and ordinarily the arms are very much shorter. 
Ophiothrix punctolimbata. 
Von Martens. 1870. Arch. f. Naturg., Jhrg. 36, 1, p. 257.—Déderlein. 1896. Jena. Denkschr., 8, pl. xvi, 
figs. 18, 18a. 
This is a species with which I have never met, nor does Mr. Lyman seem to have ever 
seen specimens he could refer to it. De Loriol, Déderlein, and Koehler all think it is quite 
distinct from longipeda, but it seems to me of doubtful validity. Bell (1884) reports it 
from Port Curtis, Port Molle, Thursday Island, Prince of Wales Channel, and Warrior 
Reef, and Déderlein (1896) records a specimen taken by Semon at Thursday Island. The 
Siboga took five specimens in the Kast Indies, which Koehler assigns to punctolimbata, and 
Matsumoto (1917) records one Japanese specimen. More field-work and much larger series 
of specimens are necessary before the real status of this species and hirsuta can be settled. 
Ophiothrix rhabdota. 
H. L. Clark. 1915. Mem. M. C. Z., 25, p. 278, pl. 13, fig. 4. 
(Plate 15, Figures 6 and 7.) 
This species is of very doubtful validity, as it is very near longipeda, and it is improb- 
able that the stripes on the arm will prove a sufficiently constant mark of distinction. 
We took the first specimen at Erub, September 18, 1913, but later found a number of similar 
individuals at Mer. The yellow stripes, so well shown in figure 7, plate 15, are an easy 
recognition mark fairly well kept by preserved material. 
Ophiothrix rotata. 
Von Martens. 1870. Arch. f. Naturg., Jhrg. 36, 1, p. 258. 
This is a species of which very little indeed is known. Zamboanga, Philippine Islands, 
is the type locality, but it can not be commonly or widely distributed in the Philippines, 
since the Challenger did not meet with it, nor are there any specimens in either the Semper 
or Griffin collections in the Museum of Comparative Zodlogy. The Siboga failed to find 
it in the East Indies, and the only records of its occurrence anywhere since it was described, 
that I have found, are those of Bell. In the Alert Report he discusses three specimens from 
Thursday Island, though he is not very sure of two of them, and ten years later (1894) he 
lists with a question mark a young specimen from Macclesfield Bank. It is perhaps im- 
portant to note that whereas von Martens’ type had the arms five times the disk diameter, 
the Thursday Island specimen which Bell refers ‘‘without doubt”’ to the same species had 
the arms twelve and a half times the disk diameter. One wonders that the validity of the 
