Clark — New Genera and Species of Crinoids. 227 



in position, standing out vertically from the dorsal surface of the penulti- 

 mate joint, not reaching quite half the diameter of that joint in length; 

 terminal claw rather longer than the penultimate joint, stout, and strongly 

 curved. 



Radials even with the edge of the centro-dorsal ; first costals short, four 

 or five times as broad as their median length, not united, the lateral edges 

 straight; costal axillaries triangular, about twice as broad as long, rising 

 to a rather prominent median tubercle with the first costals. Ten slender 

 arms about 60mm. long; first brachial short, wedge-shaped, about twice 

 as long outwardly as inwardly, inwardly united for about the proximal 

 half, the distal free edges diverging at rather more than a right angle; 

 second brachial similar in shape, but slightly larger, rising in the proxi- 

 mal median line to a moderate tubercle with the first; third and fourth 

 brachials (syzygial pair) slightly longer inwardly than outwardly, about 

 twice as broad as the longer lateral length; four following brachials 

 oblong, rather over three times as broad as long; second syzygial pair 

 wedge-shaped; following brachials triangular, not so long as broad, later 

 becoming wedge-shaped, broader than long, and, in the terminal portion 

 of the arm, as long as, or even longer than, broad. After about the tenth 

 the brachials have rather strongly produced and overlapping, finely ser- 

 rate, distal edges, giving the arm a characteristically rough appearance; 

 this begins to die away in the outer half of the arm, and disappears in 

 the distal third. Syzygies occur between the third and fourth brachials, 

 again between the ninth and tenth (rarely the tenth and eleventh), four- 

 teenth and fifteenth to seventeenth and eighteenth, and distally at intervals 

 of five to eight (usually five) oblique muscular articulations. 



Pj about 4mm. long, moderately slender, tapering evenly from the base 

 to the tip, with sixteen joints, of which the first two or three are not quite 

 so long as broad, the remainder squarish; in its outer half the pinnule 

 becomes styliform and then flattened; the last ten joints have their distal 

 dorsal ends much produced, so that the dorsal outline of the distal third 

 (or rather more) of the pinnule is very strongly serrate; P 2 about 6mm. 

 long, much stouter than P x , much the largest pinnule on the arm, with 

 about nineteen joints, the first two not quite so long as broad, the 

 remainder approximately squarish; after the third joint the pinnule 

 gradually becomes sharply styliform, the distal dorsal end of the joints 

 projecting in a rounded, laterally flattened tubercle, which soon becomes 

 very prominent; the base of this tubercle gradually involves more and 

 more of the dorsal side of the joints, in the last ten or twelve arising from 

 the whole dorsal surface, so that the terminal half of the pinnule, like the 

 distal third of the first, is deeply scalloped in lateral view ; P 3 about as 

 large basally as P 1; but shorter (3.5mm.) with twelve joints, the first 

 three not quite so long as broad, the fourth squarish, the remainder 

 becoming gradually longer than broad, in the terminal portion about 

 twice as long as broad; beyond the third joint the pinnule becomes 

 rounded-triangular, and the distal dorsal end of the joints is prominent, 

 though not excessively produced ; P 4 slightly smaller and more delicate 

 with about the same number of joints, which are proportionately longer 



