175 
as broad as long, increasing to the sixth which is one half to two 
thirds again as broad as long; following joints similar, becoming 
twice as broad as long again in the distal half of the cirri; second 
and following joints more or less 'fdice-box shaped” with expanded 
and somewhat overlapping distal ends which are armed all around 
with fine spines; distally this character becomes less and less marked 
and finally disappears at about the middle of the cirrus, when the 
ventral surface of the cirrus becomes perfectly smooth; dorsally the 
projection of the distal edges of the cirrus joints becomes progres- 
sively more and more flattened, after the tenth or fourteenth re- 
solving itself into a pair of small sub-terminal spines which become 
more prominent distally, on the antepenultimate joint being reduced 
to a single small median spine which may, however, be altogether 
absent; opposing spine much larger than the spines on the pre- 
ceding joints, triangular, the apex nearly or quite terminal, arising 
from the entire dorsal surface of the penultimate joint, and equal 
to between half and the whole diameter of that joint in height. 
Radials even with the centro-dorsal in the median line, but 
produced anteriorly in the angles of the calyx, entirely separating 
the bases of the I Br,; 1 Br, oblong or slightly trapezoidal, three 
times as broad as long, strongly convex dorsally, the ventro-lateral 
edges produced into a thin flange-like process; I Br, (axillary) 
broadly pentagonal, twice as broad as long or slightly broader, the 
lateral edges about two thirds as long as those of the IBr,, making 
with them a very obtuse angle, and, like them, provided with a 
thin flange-like ventro-lateral process. 
Ten arms, 120 mm. to 130mm. long; first two brachials slightly 
wedge-shaped, about twice as broad as the exterior length, the first 
interiorly united for the proximal three fourths, diverging at ap- 
proximately a right angle distally, and furnished with a more or 
less irregular flange-like process like those on the elements of the 
IBr series; third and fourth brachials (syzygial pair) oblong or 
slightly longer interiorly than exteriorly, twice as broad as long; 
next four or five brachials oblong, about twice as broad as long, 
