154 
armed with spinules which become very numerous on the lateral portion 
of the dorsal surface of the IBrj-. a broad and low, almost obsolete, 
carination on the arms; arms 125 mm. long; cirri with 40 — 55 seg- 
ments, 40 mm. long (southern Japan; 664 — 729 Metres) . . aster 
\r elements of the division series and first two brachials perfectl)- smooth, 
without spines 
c' cirri with at least 50 segments 
d' elements of the division series and first two brachials with narrowly 
prominent borders and low narrow median keels; arms 120 mm. long; 
cirri with 55 — 60 segments (Hawaiian Islands; 245 Metres) crassicirra 
d- elements of the division series and first two brachials without 
modified borders, and with no trace of a median keel 
e^ about 50 cirrus segments (S t. \^ i n c e n t , West Indies; 
158 Metres) koehleri 
e- about 70 cirrus segments (southern Japan; "deep water") conifer a 
c" cirri with not more than 45 segments; division series strongly, but 
roundedly, carinate 
d* cirri longer and more slender, 30 mm. long with 29 — 31 segments; 
carination of the division series broader; lower brachials with a 
broad median keel (Say a de Mai ha; 243 Metres) . . . . gardineri 
c" cirri shorter and stouter, 27 mm. long with 40 — 41 segments; 
carination of the division series narrower; lower brachials with a 
faintly indicated crest (Sahul Bank; no depth recorded) . looodmasoiii 
1. Cosviioinetra koehleri A. H. Clark. 
Hartlaub. Memoirs Mus. Comp. Zool., vol. 27, 1912, N" 4, p. 366, pi. 3, figs 2, 4; pi. 14, 
figs. 5, 10 {Antedon duplex, part). 
2. Cos7nioinetra conifera (Hartlaub). 
Hartlaub. Nova Acta der Ksl. Leop.-Carol. deutschen Akad. der Xaturforsch., vol. 58, 1891, 
N" I, p. 76, pi. 4, fig. 46; pi. 5, figs. 51, 56 [Ayitedon conifera). 
3. C'osviiometra delicata A. H. Clark. 
A. H. Clark. Proc. U.S. National Museum, vol. 34, 1908, p. 225 [Thalassoinetra delicata). 
4. Cosmiometra crassicirra (A. H. Clark). 
A. H. Clark. Proc. U.S. National Museum, vol. 34, 190S, ji. 225 [Jhalassomctra crassicirra). 
5. Cosmiometra gardineri A. H. Clark. 
A. H. Clark. Proc. U.S. National Museum, vol. 40, 191 1, p. 31 [Cosiniometr a gardineri). 
Smithsonian Miscellaneous Collections, vol.61, 191 3, N" 15, p. 43 [Cosmiometra gardineri). 
