1/8 
V-shaped groove; lo — 13 arms 175 mm. long; IIBr 2; cirri 
XX — XXV, 20 — 25, most of the segments longer than broad, 
the outer without terminal tubercles (Kei Islands; 252 Metres) Jiexilis 
f- the dorsal surface of the ossicles of the IBr series and first 
two brachials is not elevated, but bears more or less prominent 
oval or rounded median tubercles 
g^ division series all 2 ; ossicles of the division series and first 
two brachials with slightly developed broad median tubercles, 
or none at all ; there is no eversion of the adjoining lateral •' 
edges of these ossicles; cirri very long and stout, XX — L, 
18 — 31 (usually 28 — 31), 55 mm. to 70 mm. long, the 
outer segments markedly longer than broad; 12 — 16 arms 
250 mm. long (Sahul Bank, the Kei Islands and 
Timor; 252 — 520 Metres) robjista 
g- IIBr series 4(3 + 4); ossicles of the division series and first 
two brachials with^ large and prominent oval ox rounded 
median tubercles, with rise more or less abruptly: the 
adjoining lateral edges of these ossicles are slightly everted; 
cirri XX — XXIII, 20 — 22, moderate in size, rather slender, 
the longest pro.Kimal segments about half again as long as 
broad, those in the terminal third slightly longer than broad, 
the last two or three before the penultimate with slight 
traces of dorsal tubercles 
h^ ossicles of the division series and first two brachials with 
low broad median tubercles; proximal subquadrangular 
brachials with the distal ends thickened and everted, and 
with small rounded median tubercles; remaining brachials 
with rather prominently overlapping distal ends ; i 2 arms 
170 mm. long; cirri XXIII, 20 — 21, 30 mm. to 34 mm. 
long (Andaman Islands; 1024 Metres) .... invetiusta 
h- ossicles of the division series and first two brachials with 
smaller, prominent, rather high median tubercles; proximal 
subquadrangular brachials unmodified; brachials beyond 
without prominent distal ends; 13 arms 170 mm. long; 
cirri XX, 21 — -22, 25 mm. to 36 mm. long (Laccadive 
I si a n ds; 1269 Metres) viacilenta 
I. Perissometra angusticalyx (P. H. Carpenter). 
P. H. Carpenter. "Challenger" Reports. Comatulae, 1888, p. 242, pi. 2, fig. 4a— a', pi. 50, 
figs. I, 2; fig. 5B, p. 246 {Antedon angusticalyx). 
A. H. Clark. Smithsonian Miscellaneous Collections, vol.61, 1913, N" 15, ^. d,-j {Pachylometra 
angusticalyx). 
