A. H. CLARK : THE CRINOIDS OF THE INDIAN OCEAN. 101 



from one third to one half again asi broad as long, the lateral edges straight, 

 barely in apposition basaily, the ventrolateral border slightly produced. 



Five arms 85 mm. long ; first brachial oblong, about three times as broad 

 as long; second slightly wedge-shaped, about the same size; third and fourth 

 (syzygial pair) slightly longer on one side than on the other, half again as 

 broad as the median length ; next three brachials approximately oblong, two 

 and one half times as broad as long, the following becoming triangular, as broad 

 as long, and after the proximal fourth of the arm wedge-shaped, as long as 

 broad, and in the terminal portion somewhat longer. The lower brachials have 

 on either side, as far as the lowest pinnule on the side, a slightly produced ventro- 

 lateral edge, corresponding with that on the IBr series; the brachials have a 

 somewhat concave dorsal surface and very prominent distal ends, everted on the 

 proximal, strongly overlapping on the distal, which gives the animal a curiously 

 ornate appearance. Syzygies occur between the third and fourth brachials (the 

 fifth and sixth post-radial ossicles), again between the eighth and ninth, and 

 distally at intervals of three, more rarely four, oblique muscular articula- 

 tions. 



Pc 5'5 mm. long, moderately stout basaily, tapering evenly to the tip, 

 rather strongly prismatic, with twelve segments, the first short, the second not 

 quite so long as broad, the third and fourth squarish, the following gradually 

 increasing in length, becoming nearly or quite twice as long as broad as long 

 terminally; P, similar to Po, with the same number of segments, but somewhat 

 stouter and not tapering so rapidly ; Po 8-5 mm. long, much stouter than Pc, 

 gradually tapering from the base to the tip, with twelve or fifteen segments, the 

 first three about as long as broad, the following very gradually becoming elonga- 

 ted and about twice as long as broad distally ; the pinnule is rounded prisma- 

 tic ; Pj similar to Pa : P6 8 mm. long, slender, cylindrical, less stout basaily 

 than Pc, gradually tapering and becoming very delicate in the terminal portion, 

 with fifteen or sixteen segments, the first short, the second and third about as 

 long as broad, the following gradually increasing in length and becoming nearly 

 or quite three times as long as broad in the terminal portion ; P.^ similar to Pb ; 

 following pinnules similar, gradually decreasing in length to 5 mm., then very 

 slowly increasing, reaching a length of 10 mm. distally. The distal ends of the 

 segments of the lower pinnules are more or less produced and spinous. 



The colour in spirits is chrome-yellow, the brachials to the second or tliird 

 beyond the second syzygy violet ; there are indistinct blotches of violet at inter- 

 vals along the arms and pinnules ; the arms have a median narrow zigzag light 

 band, bordered on each side with dark. 



Localities. — Near the Andaman Islands (14:° Oi' 30" N. lat., 93° 51' 00" E. 

 long.) 41 fathoms ; {Type Locality). — Six specimens. 



Eight miles tvesl of Interview Island, Andamans ; 270 — 45 fathoms. — One 

 specimen. 



