A. H. CLAllK : THE CRINOIDS OF THE INDIAN OCEAN. *1 



in the Carolines, appears to be a young example of this species. I have examined 

 his specimen at Hamburg. 



COMATELLA DECORA. 



■i. Actinometra difficilis 1888. P. H. Carpenter, "Challenger" Reports, 

 vol. 26, Zoology, p. 93, pi. lii, fig. 2. 



1. Actinometra pukhella (part) 1888. P. H. Carpenter, " Challenger" 

 Reports, vol. 26, Zoology, p. 304, pi. lii, fig. 2. 



Gomatula paucicirra 1908. A. H. Clark, Proc. U.S. Nat. Mus., vol. 34, p. 317. 



Description.— Centrodorsal large, thick-discoidal, the large bare polar area 

 flat, obscurely pitted about the periphery. 



Cirri XX, 12-13, 15 mm. long; first segment very short, second half again as 

 long as broad, third twice as long as broad, fourth and fifth rather over twice as 

 long as broad (the fifth slightly longer than the fourth), sixth about twice as long 

 as broad, the following decreasing gradually in length, the last two or three before 

 the penultimate being about as long as broad, and the penultimate about half 

 ao-ain as broad as long; from the sixth onward the distal dorsal edge of the 

 segments is slightly everted, forming a low crescent-shaped or shallow V-shaped 

 ridge across the distal end of the segment, appearing as a low subterminal spine 

 in lateral view ; dorsal surface of seventh and following segments with a slight 

 median carination ; opposing spine triangular, blunt, arising from the entire 

 surface of the penultimate segment, the apex subterminal to subcentral, low, equal 

 to about one third of the distal diameter of the penultimate segment in height ; 

 terminal claw twice as long as the penultimate segment, strongly curved basally, 

 but becoming straighter distally. 



Ends of the basal rays visible as rather large flattened rhombic tubercles in 

 the angles of the calyx; radials concealed in the median line, but interradially 

 forming a triangle over the ends of the basal rays, slightly separated distally ; 

 IBr, trapezoidal, short, over three times as broad as long, strongly rounded 

 dorsally. separated basally by the distal divergence of the radials, the sides of 

 adjacent IBr, diverging at a very obtuse angle; IBr^ (axillary) broadly pen- 

 tagonal, about half again as broad as long, the lateral edges about as long as those 

 of the IBr forming with them an obtuse angle, the lateral edges of the IBr^ 

 on adjacent rays being practically parallel; a broad strip of perisome, in width 

 about equal to one third of the diameter of the IBr series, is visible between 

 tliem (and similarly between the IIBr series), but it does not extend dorsally 

 beyond their ventral edge. IIBr series 2 (eight are present and two absent in 

 the type), the IIBr| united for their proximal two thirds, from that point diver- 

 ging in practically a straight line ; IIIBr series 2, only present in one instance, 

 on the exterior side of a derivative from a IBr series. 



Nineteen arms (in the type) about 90 mm. long ; first two brachials similar, 

 rather small, wedge-shaped, about twice as broad as long exteriorly, the first 

 united interiorly in the proximal half, diverging widely in the distal; third to 



