22! 
single socket; the radial areas are delimited by slightly siiiilccn 
bare areas from half to ([iiite as wide as the adjacent sockets; 
the cenlrodcirsal is 4 nun. broad at the base and 4 mm. hi^^h 
(Postilion Islands to the Andamans, and northward 
to the ('. ul f f Marlaban; 338 — 794 Metres) .... mira 
e* smaller, the centrodorsal being not more than 3.2 mm. in basal 
diameter, rounded conical; the cirrus sockets are le.ss definitely arranged 
f^ intcrradial furrows on the centrodorsal broad and distinct, from 
as wide as the adjacent cirrus sockets to as wide as the entire 
cirrus bearing portion of the radial areas; cirrus sockets very 
irregular in arrangement, but usually in two columns with addi- 
tional sockets toward the pro.ximal border of the centrodorsal ; 
very slender; arms about 100 mm. long; cirri XL — L, 25, 
35 mm. long (southwest of Akyab, Burma; 4S9 Metres) ^racillima 
f- interradial furrows on the centrodorsal narrow and more or less 
obscure; cirrus sockets less irregular in arrangement, 7 — 9 in 
each radial area; centrodorsal very low, with rounded sides 
(Sumbawa to Ceram; 521 — 835 Metres) innsitata 
d- cirrus sockets in two columns of from two to four each in each radial 
area; centrodorsal low, conical, with the ti[) slightly rounded 
e^ cirrus sockets regularly arranged 
f the ten columns of cirrus sockets of 2 (rarely 3) each are closely 
crowded, without segregation into radial pairs; arms about 80 mm. 
long; cirri XX, 26 — 31, 30 mm. to 45 mm. long (Antarctic 
regions, near Gauss berg; 2725 Metres) antarctica 
f^ the ten columns of cirrus sockets are segragated into five pairs 
which are separated by bare interradial spaces 
g^ radial areas delimited by narrow irregular lines; 20 large 
cirrus sockets, four in each radial area, in two closely crowded 
columns; centrodorsal rounded conical, 1.7 mm. in diameter 
at the base, and about i mm. from the ape.\ to the inter- 
radial border; I^ bears a gonad (near Saleyer, south of 
Celebes; 1158 Metres) anoiiuila 
g- radial areas delimited by prominent bare interradial spaces 
from half as wide as to as wide as the adjacent sockets 
h' larger, the centrodorsal raeasuring 3.2 mm. across the base 
and 4 mm. from the apex to the interradial margin; bare 
interradial areas very regular, about as wide as the adjacent 
sockets; three or four cirrus sockets in each column (Phi- 
lippine Islands; 759 Metres) parva 
h- smaller, the centrodorsal measuring 1.8 mm. across the base 
SIBOGA-E.XPEDITIE y.V\\b. -^9 
