990 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL. XXXIV. 
spines; the opposing spine is terminally situated, triangular, about 
equal in height to the diameter of the penultimate joint, and arising 
from the entire dorsal surface of that joint; the terminal claw is 
stout basally, slender distally, strongly curved, and longer than the 
penultimate joint; both the opposing spine and the terminal claw 
are rather disproportionately large. 
A deep cleft is present between the proximal part of the centro- 
dorsal and the radials; ends of the basal rays visible, bridging over 
this cleft interradially. Radials short, the anterior edge fringed 
with spines; first costal short, about four times as broad as long, in- 
cised in the median line by a backward projection from the costal 
axillary, and with the posterior edge strongly everted and very spi- 
nous; costal axillaries rhombic, about twice as broad as long, the edges 
everted and very spinous. Ten deep, compressed arms, apparently 
about 150 mm. long; first brachial short, concave anteriorly, rather 
longer outwardly than inwardly where they are united in their proxi- 
mal half above the angle of the costal axillary; the posterior border 
everted and spinous; second brachial larger, irregularly quadrate, the 
anterior and posterior borders everted and spinous; third and fourth 
brachials (syzygial pair) about as long as broad, slightly longer in- 
wardly than outwardly, the anterior and posterior edge and the syzy- 
gial line spinous; following five joints oblong, about half again as 
broad as long, with both edges everted and standing up vertically as a 
row of fine thickly set spines; the following joints are quadrate, about 
as long as broad, gradually becoming more elongate distally, at the 
extreme arm tips being oblong, and twice as long as broad; all the 
joints have overlapping spinous ends. Syzygia occur between the 
third and fourth, ninth and tenth, and fourteenth and fifteenth brach- 
ials, and distally at intervals of two to five (usually three or four) 
bifascial articulations. 
First pinnule 7 mm. long, very slender, the first four or five joints 
about as long as broad, broader than the others, the remainder filiform 
and elongated; second pinnule 10 mm. long, somewhat stouter than 
the first pinnule, the first two joints comparatively broad, and about as 
long as broad, the remainder elongate and slender; the following pin- 
nules are very slightly stouter and of decreasing length, then becom- 
ing longer again and slightly more slender distally; all the pinnule 
joints have slightly overlapping, finely spinous edges; the distal pin- 
nules have their two proximal joints considerably expanded, the first 
joint short and crescentic, the second about as long as its proximal 
diameter and trapezoidal, the remainder about three times as long 
as broad. 
Color (in life) —A deep purplish vinaceous, the calyx and arm 
bases brownish (Fisher). 
