122 FISHER 



a. Lateral abactinal paxillae with a quadrate or subquadrate tabulum. 

 b. No pedicellariae ; abactinal surface drab gray or greenish gray in 



life Luidia foliolata . 



bb. Pedicellariae (bivalved) on inferomarginal plates (abactinal end) 

 and on superomarginal paxillae, and trivalved upright pedicel- 

 lariae on actinal intermediate plates ; abactinal surface reddish 



in life, sometimes mottled with lighter Ltiidia ludivigi. 



aa. Paxillae with stellate crown ; granuliform abactinal 2-jawed pedi- 

 cellariae; slender 2-jawed actinal intermediate pedicellariae; 

 rather prominent lateral spines Luidia asthenosoma. 



LUIDIA LUDWIGI Fisher, new species. 



Rays 5. jR = 107 mm.; r = 13 mm. 7? = 8.2r. Breadth 

 of ray at base, 15 mm. 



Rays slender, very gradually tapering to a pointed extremity ; 

 interbrachial arcs acute ; general form depressed as in other 

 species of genus, but abactinal surface well arched ; sides of 

 ray rounded ; abactinal area with 3 or 4 regular series of quad- 

 rate paxillae on each side, the superomarginal with small 2- 

 and 3-jawed pedicellariae ; inferomarginal plates rather narrow, 

 arched, with 1 to 3, usually 2, lateral spines, and 3-6 actinal 

 spinules larger than spinelets of general surface, and on upper 

 end a pedicellaria similar to that of adjacent paxilla ; actinal 

 intermediate plates of interradial areas and proximal half of ray 

 each with a rather prominent 3-jawed pedicellaria ; adambula- 

 cral plates with a curved furrow spine, 3 actinal spines and 1 or 

 2 smaller spinules. 



Abactinal paxillar area rather crowded ; paxillae of 4 or 5 

 lateral regular series, quadrate ; fourth, fifth, or sixth series 

 (according to size of specimen) with many subcircular or not 

 obviously quadrate paxillae ; superomarginal paxillae slightly 

 smaller than those of adjacent series ; paxillae thence decreas- 

 ing in size toward mid-radial area where they are arranged 

 without regularity and are roundish or irregular in outline. In 

 some small specimens paxillae are not so obviously quadrate in 

 lateral series, being subcircular in outline, but nevertheless 

 arranged regularly. Crown of spinelets not so flat as in folio- 

 lata but rather convex especially in small examples ; supero- 



