22 I 



in height does not reach a third of the diameter of the segment; the terminal claw is about 

 as long as the penultimate segment, and is moderately curved. 



There are no basal rays. 



The radials are only visible in the interradial angles. The IBrj are very short with a 

 concave anterior border which in the median line nearly reaches the straight posterior border. 

 The IBr., (axillaries) are roughly rhombic with a rounded posterior prolongation; the anterior 

 angle is sharp and greatly produced. The IBr series are normally just in apposition laterally, 

 but are not laterally flattened. 



The 10 arms are probably between 50 mm. and 60 mm. long. The first brachial 

 exteriorly is about half as long as broad, but becomes reduced almost to a point interiorly, 

 and is deeply incised in the median line by the considerably larger irregular second brachial. 

 The first syzygial pair (composed of the third and fourth brachials) is wedge-shaped, much 

 longer interiorly than exteriorly. The following brachials are rather short, after the twelfth, 

 becoming more triangular, about as long as broad. The proximal brachials as far as the 

 eighth have slight alternating lateral tubercles. The edges of the ossicles of the IBr series and 

 the lower brachials are everted, prominent, and very spiny. 



Syzygies occur between the third and fourth, ninth and tenth and fourteenth and fifteenth 

 brachials, and distally at intervals of two oblique muscular articulations. 



P x is 7.5 mm. long, slender, composed of 35 or more short segments, those in the 

 proximal half about as long as broad with the corners cut away, those in the distal half 

 becoming gradually somewhat elongated, the very slender terminal segments being about three 

 times as long as broad. P, is 7 mm. long, considerably stouter and less flexible than P n with 

 about 15 segments of which the first three are about as long as broad and the following 

 become elongated, the sixth over twice as long as broad and the terminal four or five times 

 as long as broad. The following pinnules as far as P 7 are similar, after which the pinnules 

 become longer and more slender with the first two segments slightly enlarged, the first short, 

 the second about as long as broad, the remainder elongated. 



The colour in spirits is white with a median line of black on the IBr series and the 

 lower portion of the arms, beyoncl which each syzygial pair bears a transverse black band or 

 large black spot; ventrally the disk is black, and the perisome of the arms is yellowish 

 banded with black. 



The specimen described is Cat. N° 22674 U. S. National Museum. 



2. Coccomctra hagenii (Pourtalès). 



Pourtalès. Buil. Mus. Comp. Zool., vol. 1, N" 6, 1868, pp. 105, 111, 125 (Comatula hagenii); 



N" 11, 1S69, p. 355 {Antedon hagenii); vol. 5, N n 9, 1878, p. 214 (Antedon hagenii). 

 P. H. Carpenter. Buil. Mus. Comp. Zool., vol. 9, 1881, N°4, pp. 154 — 156 (Antedon hagenii). 

 VON GRAFF. Buil. Mus. Comp. Zool., vol. 11, 18S3, N" 7, pp. 128, 129, 132 (Antedon hagenii). 

 A. AGASSIZ. Buil. Mus. Comp. Zool., vol. 15 ("Three Cruises of the 'Blake' ", vol. 2), 1888, 



pp. 124, 127 (Antedon hagen//). 

 Hartlaub. Memoirs Mus. Comp. Zool., vol. 27, 1912, N° 4, p. 389, pi. 8, figs. 1 — 12; pi. 15, 



figs. 2, 6 (Antedon hagenii). 



