i6o 
3. Parametra gramilata A. H. Clark. 
P. H. Carpenter. "Challenger" Reports. Comatulae, 1888, p. 212 {Antedon comprcssa, part; 
specimen from Stat. 201). 
A. H. Clark. Smithsonian Miscellaneous Collections (Quarterly Issue), vol. 52, 1908, part 2, 
p. 227 [TItalassoinetra coinpressa). 
Proc. U. S. National Museum, vol. 36, 1909, p. 406 (Parametra coinpressa). 
■ Proc. U.S. National Museum, vol. 39, 191 1, p. 554 (Parametra coinpressa). 
■ Smithsonian Miscellaneous Collections, vol.61, 1913, N" 15, p. 45 [Parametra gramilata). 
Stat. 105. 6°8'N., 121° 19' E. Sulu Sea. 275 Metres, i Ex. 
This small .specimen has 10 arms about 35 mm. long-; this cirri have 15 segments of 
which the fourth is a transition segment. 
4. Parametra orion (A. H. Clark). 
A. H. Clark. Proc. U. S. National Museum, vol. 33, 1907, p. 143 (Antedon orion). 
Proc. U.S. National Museum, vol. 34, 1908, p. 310 (Thalassometra orion). 
Proc. U.S. National Museum, vol. 39, 1911, p. 554 (Parametra orion). 
Lissometra A. H. Clark. 
The only species in this genus is the following : 
I. Lissometra a/dojiava (A. H. Clark). 
A. H. Clark. Proc. U. S. National Museum, vol. 33, 1907, p. 145 (Antedon albojiava). 
Horaeometra A. H. Clark. 
The only species in this genus is the following : 
I. Horaeojuetra djiplcx (F. H. Carpenter). 
VON Graff. Bull. Mus. Comp. Zool., vol. 11, 1S83, N" 7, p. 133 (Antedon duplex). 
"Challenger" Reports. Myzostoma, 1884, pp. 17, 18 (Antedon duplex). 
P. H. Carpenter. "Challenger" Reports. Comatulae, 1888, pp. 207, 212 (Antedon duplex). 
Hartlaub. Mem. Mus. Comp. Zool., vol. 24, 1912, N" 4, p. 366 (part), pi. 3, figs. 6 — 11 
(but not 2, 4, 5); pi. 14, fig. 13 (but not 5 and 10) (Antedon duplex). 
Stiremetra A. H. Clark. 
Key to the Species of the Genus Stiremetra. 
a' Longest proximal cirrus segments only very slightly longer than broad ; all the 
cirrus segments except the very short basal bear very prominent dorsal spines 
(off Port Jackson, New South Wales; 17 10 Metres) spinicirra 
a- Longest proximal cirrus segments at least twice as long as broad; dorsal spines 
confined to the shorter distal segments 
b' centrodorsal large and columnar, the two columns of cirrus sockets in each 
radial area separated interiorly by a broad V-shaped furrow as wide as the 
