SEA LILIES, STABFISHES, ETC. — CLAEK. 3L 



unifomily to a blunt point. Disk and rays, wdthin area 

 bounded by superomarginal plates, covered by small (little 

 exceeding 1 mm. in diameter of the slightly capitate top), 

 crowded paxillae, each of which bears numerous (50-100) 

 short, slender, dehcate, somewhat glassy spinelets ; paxillse 

 without definite arrangement, except along sides of rays,, 

 where series parallel to the width-diameter of the supero- 

 marginal plates may be distinguished ; there are usually 2, 

 but may be 3 such series adjoining each superomarginal plate. 

 Madreporic body very large, 14 mm. across, carry-ing about 

 50 paxillae Avhich tend to conceal it verj^ completely ; these 

 paxillse are lower and less perfectly formed than those on the 

 disk itself ; the outer margin of the madreporite is 9 mm. 

 from the inner margin of the superomarginal plates. The 

 latter are 46 or 47 in number on each side of each ray ; those 

 near the interradial angle are about 2 mm. long by 6 mm. 

 wide, but as one passes distally length increases and breadth 

 decreases and near the middle of the arm they are 3 mm. long 

 and 4 mm. wide ;. the length never quite equals the width ; 

 all of the superomarginals are densely covered by minute 

 spinelets like those of the paxillse ; there are no spines or 

 enlarged spinelets anywhere on the abactinal surface. 

 Terminal plate small, sUghtly swollen, smooth, pentagonal- 

 cordate, with rounded angles. 



Infero marginals correspond in number and position with 

 the superomarginals but are much larger and project con- 

 spicuously beyond them, except near tip of ray ; the inter- 

 radial ones are 2 mm. long by 9 mm. wide, while those near 

 the middle of the arm are 3 mm. by 6 mm. ; their covering 

 consists of a close coat of short, flattened, blunt spinelets, 

 much coarser than those on the superomargmals. Fasciolar 

 channels between marginal plates neither pecuhar nor con- 

 spicuous. Actinal intennediate plates wanting at tip of ray ; 

 the series adjoining the adambulacrals begins at about the 

 tenth inferomarginal from tip ; a second series begins at about 

 the 17th-20th inferomarginal from tip ; a third at about the 

 30th ; the last becomes irregular and difficult to follow before 

 reaching the mouth. The remainder of the large, actinal inter- 

 radial areas are covered by similar but smaller plates forming 

 parallel, radial series between adambulacral and infero- 

 marginal plates ; these radial series are fairly regular ; usually 

 a distinct unpaired series of about 5 plates occupies the 

 midradial lines, but reaches little more than half-way to the 

 inferomarginals. All the actinal plates are covered, like the 

 inferomarginals, with short, flattened, rough spinelets, \\dder 

 and blunter on central area of each plate than along its- 

 margins. There are no spines or enlarged spinelets anywhere. 



