100 Mr. A. Alcock on 



of the plates of tlic ajjical half of the ray they are unarmed, 

 but the cap-like terminal plate has a fringe of five spinelets. 

 The infero-marginal^, which correspond plate to plate with 

 the supero-marginals, have each a strong lateral bulge on 

 ■which stands a horizontal series of three (sometimes only 

 two) spines, but in the apical half of the rays there is only one 

 spine, jilaccd on the extieine distal edge of the jjlatc. 



The small adambulacral plates have each a palmate furrow- 

 series of six or seven spinelets, and almost in serial contiimity 

 with these, and to the central (adoral) side of them, a pedi- 

 cellaria with two long spoon-shaped valves; actinally each 

 plate has near its distal end an eminence on which stands a 

 stout spine longer than the plate itself and usually longer 

 than any of the infero-marginal spines, in addition to two or 

 three pustules; on the mouth-plates, which are extremely 

 prominent actinally, the spine and pedicellaria are usually 

 absent, and only the pustular granules present, but the central 

 (adoral) furrow-s])ines are much enlarged. 



The actinal interradial areas are very large, reaching to the 

 sixth or seventh infero-marginal (thirteenth or fourteenth 

 adambulacral) plates ; each area bears eighty to ninety large 

 platesarranged inconcentricchevrons; all the plates are covered 

 with a distantly granular membrane, and some or all of them 

 (but most constantly those of the series next the ambulacrum) 

 bear one or more j)apilliform j^edicellariaj ; tiie plates of the 

 second series from the ambulacrum are of superior size. 



Anus central, distinct. Madreporifurm plate large, with 

 fine radial striations ; placed rather nearer to the centre than 

 to the margin. 



Ambulacral furrow wide; tube-feet with a termiiuil sucker. 



Andaman Sea, 130 to 250 fathoms. 



Family Asterinidae. 



Palmipes, Linck, 



35. Palmipes 2Jelhicidus, sp. n. 



Rays 5. 11= 1*5 r. R = 48 millim. in the 

 type specimen. 



Form a curvilinear pentagon with bluntly rounded angles; 

 flat, very thin and leaf-like, membranous, semitransparent. 



Abactinal surface with regular longitudinal and oblique 

 rows of scale-like rhomboid or subhexagonal plates, which 

 gradually diminish in size from the centre to the margin ; all 

 the plates are covered with distant erect spicules and bear 



