28 Clark — Seventeen New East Indian Crinoids. 



everted; the lateral edges are beaded like the distal edge of the radials ; 

 the proximal edge is faintly scalloped and bears a prominent median 

 tubercle; the distal edge has the median third of the eversion thickened 

 and standing up vertically as a high transverse ridge; the pseudosyzygial 

 line is finely beaded; the first brachial is oblong, about three times as 

 broad as long; the proximal edge is slightly everted, with a prominent, 

 though small, median tubercle; 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; the distal edge is everted, the central third 

 of this eversion being thickened and produced; the first syzygial pair 

 (composed of the third and fourth brachials) is about as long as broad or 

 slightly longer than broad; the proximal edge is slightly everted with a 

 minute median tubercle; the distal edge is slightly everted with a slightly 

 larger, more or less transversely elongate, median tubercle; the following 

 brachials have finely spinous distal ends which are not produced not- 

 everted ; a slight median tubercle is visible on the proximal border of the 

 brachials up to 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 either side; on the triangular brachials this becomes zigzag 

 as in the other species of the genus. 



The five arms are 60 mm. long. 



Pp is 3 mm. long with ten segments ; the first bears a very large fan- 

 shaped, rounded or distally truncated carinate process wdiich is about as 

 high as the lateral diameter of the segment; the second bears a high cari- 

 nate process half as high as the lateral diameter of the segment, of which 

 the crest is parallel to the longitudinal axis of the pinnule; the following 

 segments are similarly, but diminishingly, carinate; Pi is similar; P a is 

 5 mm. long with eleven or twelve segments, of wdiich 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 

 and not greatly enlarged, 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 of 

 the segments bear very numerous fine spines; the first segment has a 

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

 though sharply carinate; P2 is similar to P a ; Pft is 4 mm. long with 

 thirteen segments, slightly more slender than P a ; the first segment is 

 short, the second slightly longer, the third 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 cari- 

 nate; the following pinnules are similar, though w T eaker and more slender 

 with slightly longer segments distally which bear a few conspicuous 

 spines on their overlapping distal ends; the distal pinnules are exceed- 

 ingly slender, 7 mm. long with seventeen segments, of which the third 

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



Type locality.—" Siboga" Station No. 289. 



