OPHIUROIDEA 241 



farther out there is only one scale, which also gradually dis- 

 appears. Arm spines 3, very slender ; the two lowermost ones 

 short, placed close together close to the pore ; the uppermost, 

 longer, in the proximal part of arm about as long as an arm- 

 joint, placed at the upper edge of the side plate. Mouth shield 



Fig, 130. — Ophiura Ljungmani ; part of dorsal and oral side ; below two 

 arm-joints in side view (left) and from above (right). x ca. 6. (The 

 two upper figures from Farran, Deep-water Ast. . . . Ireland ; slightly 

 altered. ) 



broad, shield- shaped, reaching more than half-way to the edge 

 of disk, which is rather high. About 4 rather coarse mouth 

 papillae on each side of jaw. Colour in life, reddish - violet. 

 Reaches a size of ca. 9 mm. diameter of disk. Length of arms 

 ca. three to five times the diameter of disk. 



In British seas this species has been found at 50° 48' N., 

 11° 41' W., 1620 m., and 51° 22' N., 12° 41' W., 1765 m. 



R 



