-I' ' 



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 s< 

 ments longer than bn 



d' P. with v' 1.5 segments ol which those beyond the seventh 

 to eleventh are than broad, the distal elongate, though 



never much more than twice as long as broad; 1', is similar to 

 P hm sh Vrabian Sea to southwestern Japan; 



192—2160 Metres) Cyclometra 



d 9 1', with 50 1 ■ segments of which only the terminal are longer 

 than broad, and those only very slightly so; I', is similar to 1',. 

 and usually of about the same length 



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 S e o t i a ; western s h o r e s of the O k h o t s k 

 and fapanese Se as from Cape Terpenia to Korea; 



1 2 — 1340 Metres) Heliometra 



brachials with spinous distal edges; ossicles of the division 

 series with usually spinous borders and commonly with a 

 -reuter 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 Hom northward along the western co ast 

 of South and North America to Alaska, the nee 

 westward and southward to southern Japan; 

 11 [911 Metres) Florometra 



The genus Heliometra includes only the well known Heliometra glacialis (Leach) 

 (= Antedon eschrichti J. Muller] of P. 11. Carpenter and earlier authors generally). 



Antkometra, Solanometra and Florometra are best considered as subgenera of Proma- 

 chocrinus. A full account of the first two and the last will be found in my memoir on "Die 

 Crinoiden der Antarktis" '). 



Florometra A. 1 1. Clark. 

 Key to the Species of the Genus Florometra. 



fhird syzygy between the 1 \' and iV brachials 



third syzygy between the 1 \' ■ and \ y u brachials with very rare exceptions; 



1; I ■ id. vol. 11 1 1 -■ ■ 1 1 ). 



