146 RECENT UNSTALKED CRINOIDS 
outer segments; P, is 7 mm. long with fifteen segments, 
longer, less slender and less stiff than the preceding; the 
segments have very slightly spinous distal borders; the 
following pinnules are similar to P,; the distal pinnules 
are exceedingly slender, 11 mm. long with twenty-three 
segments of which the first two are unusually enlarged 
and the following are moderately elongated with swollen 
articulations and finely spinous distal ends. 
Type locality. — »Siboga” Station N°, 253. 
Trichometra delicata, sp. nov. 
Antedon alternata (part.) 1888. P. H. CARPENTER, „Challenger” Report, 
vol. 26, Zoology, pl. 32, fig. 6. 
The centrodorsal is rounded conical, about 1.2 mm. 
broad at the base and about 0.9mm, from the dorsal pole 
to the interradial margin similar to, but very slightly 
longer than, the centrodorsal in the specimen figured by 
Carpenter; the centrodorsal is almost entirely covered by 
forty closely crowded cirrus-sockets; the small bare polar 
area bears a few long tubercles. 
The cirri have 21—22 segments and are of the same 
character as those of J. aspera; the fourth and fifth seg- 
ments, which are the longest, are twice as long as the 
expanded distal ends; the last four or five are little if at 
all longer than broad. 
The radials are short in the median line but extend 
well up in the angles of the calyx, so that the bases of 
the IBr, are not in apposition; the IBr, are very short, 
about five times as broad as long in the median line, 
slightly longer laterally than in the median line; the outer 
sides are parallel; the proximal edge is slightly everted ; 
the distal edge, except in the median line, is everted and 
finely spinous; there is a tuft of spines at the distal outer 
angles; the axillaries are almost triangular, slightly broader 
than long, the distal edges slightly everted and very finely 
spinous, the lateral angles covered with spines; the ossicles 
Notes from the Leyden Museum, Vol. XXXIV. 
