l62 
The cirri are XVIII, 62 — 66, 35 mm. to 40 mm. long; the longest cirrus segment 
(usually the sixth) is from two and one half to three times as long as broad ; the following 
slowly decrease in length, in the middle of the cirri being about as long as broad, or slightly 
broader than long, and in the terminal fourth or fifth twice, as broad as long; the longer 
proximal segments , have a .slight median constriction and slightly produced distal edges ; the 
short distal segments have a prominent median keel which, instead of being sharp along the 
crest, is broadly rounded. This keel begins as a production of the distal dorsal border of the 
segment, but* soon involves the entire dorsal surface becoming, in profile view, rounded triangular, 
the apex near the distal end, then evenly rounded, and in the terminal portion more or less 
straight along the crest. 
The ends of the basal rays and the radials are concealed, the IBr^ abutting directly 
upon the centrodorsal though nowhere touching it, being separated from it by narrow sub- 
radial clefts. 
The IBr, are very narrow and band-like, from six to eight times as broad as long; 
they are everywhere of the same width, but while the outer surface of their lateral portions 
is parallel to the axis of the IBr series, their median portion is recumbent, making an angle 
of nearly 90° with that axis, so that in direct lateral view they are only about one third as 
high in the median line as laterally. 
The axillaries are rhombic, with produced and broadly truncated lateral angles, half 
aeain as longf as broad ; the lateral edges are about as long as those of the IBr, ; the 
distal and proximal sides are strongly concave; a posterior process, about as high as the 
anterior angle but somewhat broader and more rounded, incises the IBr^. The proximal 
two thirds of the median portion of the axillaries rises into a prominent, but well rounded, 
median elevation. 
The ossicles of the IBr series are very sharply flattened against their neighbors, this 
flattening persisting as far as the base of P^. 
The first brachial is short, deeply incised by the second ; the outer length is much 
greater than the inner, and more than twice the median, the distal border being strongly 
concave. The second brachial is irregularly quadrate, with a strong posterior process incising 
the first ; the proximal three fourths of the median line is elevated, as in the axillary. The 
third brachial is oblong, very short, about five times as broad as long. All of the arms are 
lo.st beyond this point. 
Pj is 5.5 mm. long, composed of 19 segments of which the first eight are much larger, 
but proportionately shorter, than those succeeding; the second-seventh have thin very high 
carinate processes which reach a maximum on the fourth thence rapidly decreasing in heighth 
distally ; after the eighth segments the pinnule is relatively slender, and tapers gradually to 
the tip. In lateral view the pinnule appears enormously swollen in the proximal three fifths 
(first eight segments), the swelling reaching a maximum on the fourth segment and decreasing 
rapidly distally; beyond the eighth segment the pinnule is slender and evenly tapering, 
composed of segments most of which are about as long as broad, with numerous spinules along 
the prismatic ridge. 
