54 BULLETIM 82, UNITED STATES NATIONAL MUSEUM VOLUME 1 



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

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

 pressed; the fourth to sixth segments arc 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 arc concealed. The IBr, are about four times as broad as long. The 

 IBrj (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 scries and 

 between the first two brachials 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 syzj-gial pairs as one. 

 The first brachials are short, twice as long exteriorly as interiorly, w^here 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 sj-zjgial 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. 



Pi 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. P2 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. P3 is much longer and stouter, apparently about 25 mm. long 

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

 measurement), with more than 30 segments. P4 is about as stout as P3 but not so long, 

 although it has about 30 segments. P5 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 P3 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 lino. The pinnules and cirri are 

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

 each segment is brown with a broad hght margin. 



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

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

 appears to bo unifonuly yellow-brown, but under a lens faint markings corresponding 

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

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

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

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



