156 
in size, and are all much smaller than those in the Boston Society 
of Natural History and in the U. S. National Museum from Singa- 
pore, and one probably from the same place in the collection of 
Professor Robert T. Jackson of Harvard University; but except 
for the smaller size and slightly less number of cirrus joints 
(probably correlated with it), I am unable to detect any difference. 
Genus Amphimetra A. H. Clark. 
Amphimetra 1909. A.H.Clark, Proc. Biol. Soc. Washington, Vol. 22, p. 6. 
Åmphimetra målleri (A. H. Clark). 
Alecto målleri Litken, M. S. 
Himerometra måolleri 1908.. A. H. Clark, Proc. Biol. Soc. Washington, 
Mi 
rn miss 19095. AH CIark, idem., Vol 22, p. 7. 
Sindian Ocean”. The type. 
Singapore. April 16, 1907. Two specimens; one re- 
sembles the type, the other is smaller; the former flesh coloured, 
the perisome brownish, the latter flesh coloured, the perisome of 
the arms and the bases of the pinnules deep violet exactly as in 
a specimen of A. formosa at hand from the Philippine Islands. 
Straits of Malacca; H. Koch, March 9, 1872. One 
rather small specimen. 
AÅmphimetra målleri is altogether a more delicate species than 
Å. milberti, the only other species with very short, subequal, cirrus 
joints, and is very readily distinguished by having practically all 
of the cirrus joints instead of only the outer ones furnished with 
dorsal spines. 
Åmphimetra variipinna (P. H. Carpenter). 
Antedon variipinna 1882. P. H. Carpenter, Journ. Linn. Soc. (Zool.), 
Vol. 16, p. 506. 
dbbikiktelra variipinna 1909. A.H.Clark, Proc. Biol. Soc, Washington, 
NOL 22 p. 7. 
Singapore. November 27, 1907. One specimen with 
cirri XV, 31—34, 20 mm. long, and nineteen arms 80 mm. long; 
P, is 13 mm. long with 20—23 joints. Six II Br series are pre- 
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