276 BULLETIN 82, UNITED STATES NATIONAL MUSEUM VOLUME 1 



division series and brachials with prominently everted and very spinous borders; cirri with 

 the antepenultimate and several of the preceding segments very slightly, if at all, longer than 

 broad; cirri 16-18 mm. long with 17-23 segments; arms probably 50-60 mm. long (Yucatan 



to Porto Rico and Jamaica; 42-987 meters) nigrolineata (p. 276) 



6 1 . Segments in the distal half of P : short, like those in the proximal half; no black markings; elements 

 of the IBr series and lower brachials with less conspicuously spinous borders; cirri with the 

 antepenultimate and preceding segments markedly longer than broad; cirri 10-15 mm. long 

 with 17-25 segments; arms 40-100 mm. long (Cape Lookout, N.C., to Cuba and Yucatan; 

 14-1046 meters) hageni (p. 279) 



COCCOMETRA NIGROLINEATA A. H. Clark 



[See vol. 1, pt. 1, fig. 374, p. 299] 



Antedon hagenii (not of Pourtales), H. L. CLARK, Bull. U.S. Fish Comm., vol. 20, for 1900, pt. 2, 

 1902, p. 235 (in key; Fish Hawk Sta. 6067). 



Coccometra nigrolineala A. H. CLARK, Proc. Biol. Soc. Washington, vol. 21, 1908, p. 129 (listed; nomen 

 nudum; new name for Antedon hagenii II. L. Clark, 1902, not Comatula hagenii Pourtales, 1869). 

 HARTLAUB, Mem. Mus. Comp. Zool., vol. 27, No. 4, 1912, p. 389 (nomen nudum; according to 

 Clark, fig. 13, pi. 9, represents this species). A. H. CLARK, Unstalked crinoidsof theSiboja-Exped., 

 1918, p. 219 (in key; range), p. 220 (synonymy; detailed description; Albatross Stas. 2138, 2327, 

 2335, 2341, 2354; off Havana; Fish Hawk Sta. 6067); The Danish Ingolf-Exped., vol. 4, No. 5, 

 Crinoidea, 1923, p. 41 (range); Mem. Soc. Cubana Hist. Nat., vol. 14, No. 2, 1940, p. 142 (in 

 key), p. 144 (references); Bull. U.S. Fish. Comm., vol. 55, 1954, p. 374 (listed). 



lAntedon cubensis (not of Pourtales), HARTLAUB, Mem. Mus. Comp. Zool., vol. 27, No. 4, 1912, 

 p. 389, pi. 9, fig. 13, pi. 15, fig. 3. 



Diagnostic features.- The elements of the IBr series and the arm bases have a 

 broad and conspicuous black mediodorsal line; in the outer part of the arms there is a 

 single large median black spot on each syzygial pair ; the segments in the distal half of 

 PI are elongated, twice as long as broad, with very spinous distal edges; and the cirri 

 have 17 to 23 segments of which the antepenultimate and several of the preceding are 

 only very slightly, if at all, longer than broad. 



Description. The centrodorsal is hemispherical or subconical, the polar area finely 

 papillose with a rounded tubercle at the apex. 



The cirri are XXX-XL, 17-23 (usually 21-22), from 16 to 18 mm. long. The 

 first two segments are short, about twice as broad as long, the third is about twice as 

 long as broad, the fourth to eighth or ninth are greatly elongated, four or five times as 

 long as broad, and the following rapidly decrease in length so that the terminal 6 to 8 

 are about as long as broad. The elongate proximal segments are somewhat constricted 

 centrally with swollen articulations. The shorter distal segments increase gradually 

 in width from the proximal to the distal ends, the latter slightly overlapping the bases 

 of the succeeding segments. On the distal part of the dorsal side of the penultimate 

 segment there is a very small opposing spine which in height does not reach a third of 

 the width of the segment. The terminal claw is about as long as the penultimate seg- 

 ment, and is moderately curved. 



The radials are only visible in the interradial angles. The IBri are very short, with 

 a concave distal border which in the median line nearly reaches the straight posterior 

 border. The IBr 2 (axillaries) are roughly rhombic with a rounded posterior prolonga- 

 tion; 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 and 60 mm. long. The first brachial is 

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



