Clark — New Recent Crinoids from the Indian Ocean. 79 



first joint broad, about twice as wide as its proximal diameter, roundedly 

 carinate distally ; second joint wedge-shaped, about as broad as long 

 proximally, with a thin carinate process about twice as broad as high 

 distally ; third one-third longer than liroad, strongly carinate distally, 

 but the carination not quite so high as that on the preceding joint ; fourth 

 twice as long as broad, carinate distally like the third ; following joints 

 about two and one-lialf times as long as broad, slightly longer in the 

 terminal part ; the pinnule is strongly styliform, the joints being more or 

 less produced anteriorly at the angles of the prism in the shape of a spine 

 overlapping the bases of the succeeding joints ; the distal ends of the 

 joints are somewhat prominent and finely spinous, this becoming more 

 pronounced distally ; Ps 15 mm. long, similar to P2, though very slightly 

 stouter; P4 1-1 nun. long; P5 12 mm. long; Pe 10 nun. long, similar to 

 P3, but with proportionately somewhat longer joints, which in the distal 

 portion have more expanded ends; Pr, has fifteen joints; P7 10 mm. 

 long, slightly stouter than Pr,, with about the same number of joints, 

 which are proportionately rather shorter; Ps 9 mm. long, stouter than 

 P-, especially on the third, fourth and fifth joints, none of which are 

 more than twice as long as broad ; following pinnules of the same length 

 and in general similar ; the third — seventh joints are somewhat broad- 

 ened, the pinnule tajieriug evenly from a niaxinuun width on the fourth 

 to a slender tip, with nmch elongate joints wdiich have expanded and 

 spinous distal ends; distal pinnules slender, 10 mm. long. 

 Color (in spirits). — White. 



Calometra spinosissima sp. nov. 



Tijpe.—C&i. No. 13B = ^V-*^ Indian Museum; from the Andaman 

 Islands. 



Centro-dorsal discoidal, moderately thick, the bare polar area flat, 3 

 mm. in diameter; cirrus sockets arranged in a single crowded marginal 

 row. 



Cirri moderately slender, xi, 42-55, 25 mm. long ; first joint about 

 three times as broad as long, the following slowly increasing in length to 

 the sixth or seventh, which is nearly as long as broad, then reiBaining 

 similar to the twelfth or fifteenth, then very gradually decreasing so that 

 the joints in the terminal portion are twice as broad as long ; at about the 

 fifteenth joint a low sharp dorsal keel makes its appearance, at first in 

 the distal portion only, but soon along the entire dorsal surface, which 

 very slowly increases in iieiglit, becoming very prominent on the short 

 terminal joints, though never exceeding more than one-fourth their diam- 

 eter in height ; opposing spine and terminal claw as in C multicolor, to 

 which form this species is most closely related. 



Disk lacking; side and co\ering plates very highly developed along the 

 brachial and piruiule ambulacra. 



Ends of the basal rays visible as small rhombic areas in the angles of the 

 calyx, but not raised above the general surface of the radials, and there- 

 fore not especially ol)vious; radials short in the median line, but extend- 

 ing up into the angles of the calyx in the form of an equilateral triangle, 



