292 RECENT OPHIURANS. 



1002. 0. PAUVA, sp. nov, Plate 14, f . 8, 9. 



Disk, 5 mm. in diameter; arms six, 20 mm. long. Disk covered with rather 

 widely spaced, elongated granules; that is, granules which are distinctly higher 

 than thick; in some the vertical diameter is at least twice the horizontal. No 

 radial shields visible. Upper arm-plates about as long as wide; distal half of 

 margin is a semicircle, proximal half, trigonal with proximal side much the 

 shortest; plates in contact only for width of short proximal margin. Inter- 

 brachial areas below covered with a coat of delicate scales which carry a very 

 few elongated granules. Oral shields rounded pentagonal, rather longer than 

 wide. Adoral plates small, trigonal, not meeting within. Oral papillae 4 on 

 each side, the innermost smallest, the ultimate or penultimate the largest. 

 Tooth-papillae only 3 or 4. Under arm-plates somewhat octagonal with rounded 

 angles and the lateral margins much the longest; they are longer than wide 

 and distally become about twice as long as wide; they are in contact for only 

 the width of the proximal side. Side arm-plates rather large; each carries 4 

 arm-spines, of which the uppermost is longest, exceeding an arm-joint; spines 

 tapering but blunt, and none are club-shaped, thickened or in any way peculiar. 

 Tentacle-scale single, rather large, rounded on the proximal joints but becoming 

 pointed distally. Color (dried from formalin): — disk, light greenish brown, 

 variegated with pearl-gray; dorsal surface of arms very light yellowish with 

 bands of light brown every three or four joints; these bands are not well-defined 

 and cover 1-1 f upper arm-plates; lower surface very pale yellowish, the inter- 

 brachial areas pearl-gray. 



HoLOTYPE (M. C. Z. 3758) and 25 paratypes (M. C. Z. 3759, 3855). 

 Torres Strait: Murray Islands, Meb. October, 1913. Carnegie Exp. 1913. 

 H. L. Clark coU. 



When this species was first observed on the reefs at Mer, it was supposed 

 to be the young of Ophiocoma brevipes but later when the young of that species 

 were found it was noted that even the smallest have only five arms and possess 

 2 tentacle-scales. Further study proved that this six-armed form, although 

 showing such juvenile characters in many waj^s, is not the young of any of the 

 known species of Ophiocoma or Ophiomastix. The specimens were found 

 usually associated with Ophiadis savignyi on the under surface of rock frag- 

 ments, or in the crevices of sponges and corals. The coloration in life is much 

 like that of the Ophiactis (green and white) and specimens of the same size are 

 easily confused. 



