136 RECENT UNSTALKED CRINOIDS 
pole bearing a few rounded tubercles, well separated; the 
cirrus sockets are arranged in two irregularly alternating 
crowded rows. 
The cirri are XVII[—XX, 12-—13, 7 mm. to 9 mm. 
long, extremely slender, the component segments greatly 
elongated with greatly swollen articulations, especially in 
the proximal part; distally the cirri taper to a slender 
sharp tip; the longest proximal segments (third-fifth) are 
about four times as long as the diameter of their enorm- 
ously expanded distal ends, which are over twice the dia- 
meter of the middle of the segments; beyond the fifth the 
segments gradually lose the great expansion of the ends; 
the penultimate segment is about three times as long as 
the proximal diameter and tapers distally; there is no 
opposing spine; the terminal claw is about two thirds as 
long as the penultimate segment and is very slender and 
very slightly curved. 
The division series are essentially as in the preceding 
species. 
The ten arms are from 20 mm. to 23 mm. long; the 
brachials are elongated and slightly constricted centrally, 
this increasing distally. 
P, is 3.5 mm. to 4 mm. long with eleven segments, 
and tapers evenly from the base to the tip; the first seg- 
ment is twice as broad as long, the second half again as 
long as broad, the third twice as long as broad, the 
following two and one half or three times as long as broad; 
the third and following segments have produced and over- 
lapping spinous distal ends, this being much more pro- 
nounced and coarser along the distal side; P, is 1.5 mm. 
long with seven segments, much smaller and more slender 
than P, but with similar segments of which the second 
is slightly longer than broad, the third twice as long as 
broad, and the remainder elongated; P, is similar to P,; 
the distal pinnules are about 2 mm. long. 
Type locality. — »Siboga” Station N°. 50 (reef). 
Notes from the Leyden Museum, Vol. XXXIV. 
