240 
c'- brachials longer, about as long as broad or slightly longer than 
broad ; segments of the middle and distal pinnules longer than 
broad, usually very much so ; a number of the earlier cirrus seg- 
ments longer than broad 
d' Pj with 30— 45 segments of which those beyond the seventh 
to eleventh are longer than broad, the distal elongate, though 
never much more than twice as long as broad; P., is similar to 
Pj, but shorter (Arabian Sea to southwestern Japan; 
192 — 2160 Metres) Cyclometra 
d- Pj with 50 — 100 segments of which only the terminal are longer 
than broad, and those only very slightly so; P, is similar to P^, 
and usually of about the same length 
e^ brachials with smooth distal edges; ossicles of the division 
series with smooth borders and a smooth dorsal surface; 
no rudimentary terminal comb on the proximal pinnules 
(Arctic Ocean, and southward to Norway and 
Nova Scotia; western shores of the Okhotsk 
and Japanese Seas from Cape Terpen ia to Korea; 
12 — 1340 Metres) Heliometra 
e'- brachials with spinous distal edges; ossicles of the division 
series with usually spinous borders and commonly with a 
greater or lesser development of spines on the dorsal surface ; 
the proximal pinnules bear a rudimentary terminal comb sug- 
gesting that found in the species of the Comasteridae (from 
Cape Horn northward along the western coast 
of South and North America to Alaska, thence 
westward and southward to southern Japan; 
II — 19 1 1 Metres) Florometra 
The genus Heliovieti-a includes only the well known Hclioincfra glacia/is (Leach) 
(= Aiitedon eschrichti [J. Mliller] of P. H. Carpenter and earlier authors generally). 
Anthometra^ Solanonietra and Florometra are best considered as subgenera of Proina- 
chocrinus. A. full account of the first two and the last will be found in my memoir on "Die 
Crinoiden der Antarktis" ^). 
Florometra A. H. Clark. 
Key to the Species of the Genus Florometra. 
a' Third syzygy between the 14"' and 15'^ brachials 
b* third syzygy between the 14"^ and 15''' brachials with very rare e.xceptions; 
1) Deutsche Siidpolar-Expedition, vol. i6 (Zoologie, vol. 8), Mny iC, 1915, pp. 120—143. 
