A MONOGRAPH OF THE EXISTING CRINOIDS 161 



small, median tubercle, and the distal edge is strongly everted and thickened, this 

 thickened and everted border being more or less divided in the middle. The second 

 brachial is very slightly larger than the first, about twice as broad as long, with the 

 distal edge everted, the central third of this eversion being thickened and produced. 

 The first syzygial pair (composed of brachials 3 + 4) is about as long as broad or 

 slightly longer than broad, with the proximal edge slightly everted and bearing a 

 a minute median tubercle, and the distal edge slightly everted with a somewhat 

 larger, more or less transversely elongate, median tubercle. The following brachials 

 have finely spinous distal ends, which are not produced or everted ; a slight median 

 tubercle is visible on the proximal border of the brachials as far as the first or second 

 beyond the second syzygy; there is a very low and faint median carination on the 

 syzygial pair and on the following brachials, which is accentuated by being light in 

 color bordered with dark on each side; on the triangular brachials this becomes zig- 

 zag as in the other species of the genus. 



PC is 3 mm. long and is composed of 10 segments, of which the first bears a very 

 large fan-shaped, rounded, or distally truncated carinate process about as high as the 

 lateral height of the segment, and the second bears a high carinate process half as 

 high as the lateral height of the segment, of which the crest is parallel to the longitudi- 

 nal axis of the pinnule. The following segments are similarly, but diminishingly, 

 carinate. P, is similar. P a is 5 mm. long, with 11 or 12 segments, of which the first 

 is short, the second is nearly as long as broad, the third is about as long as broad, and 

 the distal are twice as long as broad; the pinnule is rather slender, not greatly enlarged, 

 and rather strongly prismatic; the distal edges of the third and following segments 

 are slightly produced and finely spinous, with prominent spines at the angles of the 

 prism; the ventral borders bear very numerous fine spines; the first segment has a 

 strongly rounded carinate process, and the second and third are narrowly, though 

 sharply carinate. P 2 is similar to P a . P b is 4 mm. long, with 13 segments, slightly 

 slenderer than P s ; the first segment is short, the second is slightly longer, and the third 

 is about as long as broad ; the distal segments are much elongated with a few long spines 

 on the distal edges, which are turned outward; the proximal segments are not carinate. 

 The following pinnules are similar, though weaker and more slender with the distal seg- 

 ments slightly longer and bearing a few conspicuous spines on their overlapping distal 

 ends. The distal pinnules are exceedingly slender, 7 mm. long, with 17 segments, of 

 which the third and following are greatly elongated ; the third bears a narrow carination. 



The perisomic deposits along the ambulacra in this species do not differ essentially 

 from those in E. junceus. 



Notes. The three specimens from the Danish Expedition to the Kei Islands sta- 

 tion 54 have the arms up to 45 mm. in length. 



In the specimen from Willebrord Snellius station 60* the production of the ends 

 of the ossicles of the division series and proximal brachials is exaggerated, and on the 

 radials and IBr : is resolved into numerous closely set prominent tubercles which are 

 expecially long in the interradial angles. The run of the centrodorsal is also tubercular. 



Localities. Albatross station 5355; north Balabac Strait; Balabac Light bearing 

 S. 61 W., 16.6 miles distant (lat. 808'10" N., long. 11719'15" E.); 80 meters; coral 

 and sand; January 5, 1909 [A. H. Clark, 1918] (2, U. S. N. M., 36009). 



