NO. 1840. A XEV,' riilJ.IPPlNE CRINOID— CLARK. 173 



Thirty-six arms about 100 mm. l5ng; first brachial short, wedge 

 shaped, almost entirely united ulteriorly, twice as broad as its inte- 

 rior length or slightly broader; second brachial similar, but sHghtly 

 larger; third and fourth (s3^zygial pair) not quite so long as broad; 

 next two brachials oblong, about t^vdce as broad as long, then becom- 

 ing triangular, about half again as broad as long, after the end of the 

 proximal third of the arm gradually becoming wedge shaped, and in 

 the terminal portion wedge shaped, about as long as broad; fourth 

 and following brachials with strongly produced and finely spinous 

 distal ends. The arm increases gradually in diameter up to the 

 tenth brachial, then tapers away very gradually distally. Syzygies 

 occur between the third and fourth brachials, again usually between 

 the thirteenth and fourteenth, and distally at intervals of four (more 

 rarely five) oblique muscular articulations. 



Disk covered with rather coarse papillse; mouth submarginal, anus 

 subcentral. 



P.i 10 mm. long, slender, with thirty-five segments, of which the 

 first is short oblong, about two and one-half times as broad as long, 

 and the followuig are rhombic, at first nearly twice as broad as long, 

 gradually becoming longer and about as .long as broad after the 

 sixth; second and following segments with the corners cut away, this 

 gradually decreasing distally and disappearing entirely after about 

 the twelfth segment; second to tenth or eleventh segments with long 

 single or double spines projecting vertically from the dorsal surface, 

 at first about equal to half the diameter of the joint in height, but 

 slowly decreasing in length distally; terminal comb short, very 

 prominent, rising abruptly, with six or seven teeth which are sub- 

 equal, triangular, slightly longer than broad, rather strongly recurved, 

 rather longer than the diameter of the segments which bear them, 

 the bases in apposition; Pj 5 mm. long, with twenty segments, resem- 

 bling Pi but weaker and more slender; Pg 3.5 mm. long with fifteen 

 segments, resembling Pj; P4 and follo^wdng pinnules stouter than the 

 preceding, 6 mm. long, with about twenty segments, the first two 

 short, the remainder squarish, becoming longer than broad distally; 

 the distal ends of the segments are spinous and strongly overlapping, 

 and the more proximal segments are usually furnished with more or 

 less prominent dorsal spines in addition; distally the pinnules grad- 

 ually become shorter and more slender, the distal pinnules being 6 

 mm. long, very slender, with about twenty segments, the fii'st two 

 short, the tliii'd longer than broad, the remainder elongated, with 

 slightly expanded ends, becoming about twice as long as broad 

 distally; terminal combs occur usually on most of the genital pin- 

 nules, and at intervals on those in the distal part of the arm. 



The color is chrome yellow, the skeleton yellowish white. 



Habitat. — Philippine Islands (Tawi Tawi group). 



Depth. — 49 fathoms. 



