138 RECENT UNSTALKED CRINOIDS 
the pinnule is proportionately stouter than P,; P, is 
10 mm. long with nineteen segments, resembling P, but 
tapering slightly less rapidly and with slightly longer 
outer segments; P, is from 4.5 mm. to 5.5 mm. long 
with from ten to thirteen segments, smaller than P, 
though otherwise similar to it; P, is 6.5 mm. long with 
fourteen segments; the distal pinnules are exceedingly slender, 
8 mm. long with seventeen segments. 
Type locality. — »Siboga” Station N°. 294. 
Iridometra gracilis, sp. nov. 
This new species is most closely related to J. nana. 
The cirri are 7 mm. long with 10 segments of which 
the third and fourth are the longest, two and one half 
times as long as the diameter of their greatly expanded 
distal ends; the antepenultimate segment is one third 
longer than broad. 
The ten arms, which resemble those of J. nana, are 
35 mm. long. 
P, is 4.5 mm. long with ten segments, very slender; 
P, is similar, 4.5 mm. long with ten segments; P, is 
8 mm. long with thirteen segments; P, is 3 mm. long 
with eight segments; P, is 4 mm. long with ten segments 
and bears a gonad; the pinnule segments beyond the 
second have overlapping and spinous distal edges which 
are especially prominent on the distal side. 
Type locality. — »Siboga” Station N°. 220 (54 meters). 
Toxometra purpurea, sp. nov. 
The centrodorsal is small, truncated hemispherical, with 
a small papillose dorsal pole; the cirrus sockets are ar- 
ranged in three closely crowded alternating marginal rows. 
The cirri are XXIV, 13—16, 10 mm. long, recalling 
those of Antedon petasus but smoother dorsally and more 
slender proximally; the first segment is short, the second 
Notes from the Leyden Museum, Vol. XXXIV. 
