54 BULLETIN 82, UNITED STATES NATIONAL MUSEUM VOLUME 1 



Only 3 cirri are present and all these are broken, but one lacks only the terminal 

 claw; this has 13 segments which are short, broad, and except basally distinctly com- 

 pressed; the fourth to sixth segments are the longest, but are not much longer than their 

 distal width. The opposing spine is small and inconspicuous. As shown by two 

 paratypes the terminal claw is not conspicuous or peculiar, but is normally curved. 



The radials are concealed. The IBrj are about four times as broad as long. The 

 IBr 2 (axillaries) are more or less triangular with slightly concave sides, not quite so 

 long as broad. The synarthrial articulations between the elements of the IBr series and 

 between the first two bracbials are not at all close. 



The 10 arms are all broken, but would not have exceeded 35 mm. in length, and the 

 number of brachials was probably not more than 70, counting syzygial pairs as one. 

 The first brachials are short, twice as long exteriorly as interiorly, where they are 

 rather markedly in contact; their length along the outer edge is equal to about half 

 their width. The second brachials are somewhat longer, and the first syzygial pair 

 (composed of brachials 3+4) equals the second brachial in size. The following three 

 or four brachials are about twice as broad as long and are nearly oblong; after that 

 they become more wedge-shaped, though never triangular. 



Syzygies occur between brachials 3+4 and 9 + 10 and then at irregular but usually 

 rather short intervals. 



P! is about 12 mm. long, very slender, with about 23 segments of which the basal 

 6 to 12 are about as long as broad, the length then increasing so that the moniliform 

 character of the pinnule disappears near the tip. P 2 is about 14 mm. long with some 

 25 segments of which only 2 or 3 at the base are as broad as long and the distal are 

 twice as long as broad. P 3 is much longer and stouter, apparently about 25 mm. long 

 (Dr. H. L. Clark said that the terminal portion is too much curved and twisted for 

 measurement), with more than 30 segments. P 4 is about as stout as P 3 but not so long, 

 although it has about 30 segments. P 5 is much smaller and shorter, with about 20 

 segments. The pinnules following are somewhat smaller but soon increase in length, 

 although they remain very slender. Beginning with P 3 the outer distal corner of each 

 segment projects as a minute spine and the distal margin begins to be slightly serrate; 

 this spininess of the distal margin of the pinnule segments becomes very marked near 

 the middle of the arm but decreases again on the distal pinnules. 



The color (dry) is brown, lightest on the centrodorsal and arm bases and again 

 distally, darkest on the dorsal side of the eighth to twentieth brachials, where it is a 

 deep purple-brown. The change of shade is very gradual and nowhere abrupt. Begin- 

 ning at the very base of each ray a light yellowish brown line, ill-defined and soon 

 broken into irregular patches, runs out on the dorsal side of each arm; there are also 

 minute specks of this light shade on each side of this line. The pinnules and cirri are 

 light brown or even pale brownish white. Distally the arms are somewhat banded as 

 each segment is brown with a broad light margin. 



Notes. Dr. Clark referred to this species four paratypes and two other specimens. 

 He said that one is uniformly cream colored dorsally and is probably bleached. Another 

 appears to be. uniformly yellow-brown, but under a lens faint markings corresponding 

 to those of the holotype arc barely distinguishable. The other two paratypes are 

 light reddish brown or fawn color, variegated with a darked purplish brown; they are, 

 however, in poor condition and were apparently stained, probably by contact with 

 other echinoderms in the collecting or preparing of the specimens. A fifth specimen, 



