76 
c^ outer cirrus segments with a slight median Iceel, but no dorsal spines 
nor tubercles; 25 — 35 (usually about 30) cirrus segments; 16 — 26 
arms 60 mm. to 80 mm. long; division series rather broad with 
slightly produced borders, though not in contact beyond the IBr 
axillary (Philippine Islands to Singapore) quinduplicava'^') 
c" outer cirrus segments with dorsal spines; division series narrow, 
strongly rounded dorsally, well separated, without produced margins 
d^ usually 20 arms up to 125 mm. in length; P, and P3 very long 
and slender, perfectly smooth, evenly tapering, composed of 
about 20 segments; cirri with 23 — 33 (usually 25 — 30) segments 
of which the outer bear long dorsal spines (Red Sea to the 
Persian GulfandKurrachi) savignii 
d- 38 arms over 80 mm. long; enlarged lower pinnules composed 
of about 30 segments; cirri composed of 40 — 50 segments of 
which the outer bear prominent, though not especially long, 
dorsal spines (Aru Islands; Queensland) nematodon 
\? component segments of the enlarged proximal pinnules with spinous 
distal edges, or with a production of the distal portion, or all, of the 
prismatic angles, so that each segment has three distal tubercles, or 
three broad thin longitudinal lateral processes 
c^ enlarged lower pinnules with numerous short cj'lindrical segments 
which have everted and spinous distal borders; 28 — 37 cirrus segments 
of which the outer bear long dorsal spines; 23 — 28 arms 50 mm. 
to 1 40 mm. long (Amboina to Canton, China) variipinna ") 
c" enlarged lower pinnules with more or less strongly prismatic segments 
which bear more or less developed tubercles at the prismatic angles 
on the distal borders, or broad longitudinal lateral processes with the 
bases coinciding with the prismatic ridges 
d^ small and delicate species with not more than 1 3 arms which are 
from 50 mm. to 100 mm. in length; cirri slender, the outer 
segments long, as long as, or longer than, broad ; the segments 
of the lower pinnules have the distal ends of the prismatic angles, 
especially the dorsal, swollen and produced, sometimes crowned 
with spines 
e^ cirri composed of 23 — 26 segments which after the tenth or 
eleventh are about as long as broad (Maldive Islands to 
Singapore) producta 
e° cirri composed of 30 — 33 segments all of which are about twice 
as long as broad at the expanded ends (Java Sea) . . . prophiqiia 
1) Includes Antedon clemens P. H. Carpenter, 1888, and Aniedon ancefs P. H. Carpenter, 1888. 
2) Includes Antedon brockii Hartlaub, 1890. 
