ANTEDON ELONGATA. 185 



1849. Comatula elongata , Muller. Abhaudl. d. Berlin. 

 Akad. 1849, p. 257. 



1862. Comatula elongata , Dujardiu. Hist. nat. des Zoo- 

 phytes. Echinodermes , p. 204. 



Description of an individual. 



Ceutrodorsal a moderately thick convex disc bearing about 

 30 cirrhi in two irregular rows round its margin. The cirrhi 

 have 25 — 30 tolerably even sized joints, the sixth and four 

 following ones of which are slightly longer than broad. The 

 succeeding ones bear slight dorsal spines, that on the penul- 

 timate joint enlarging somewhat as an opposing spine to 

 the terminal claw. 



The first radials are just visible; the second, united la- 

 terally, short, wide, and very convex; the axillaries short, 

 less than twice the length of the second radials , and penta- 

 gonal with wide distal angles. The rays are well separa- 

 ted and bear more than twenty (20 -\-) arms of over two 

 hundred joints. They may divide three times , each divi- 

 sion of two joints , the axillary not a syzygy. The first 

 joints after each axillary are rhomboidal, closely united 

 laterally , and form with their successors a slight tubercu- 

 lar elevation in the middle of their line of junction. 



Second brachials bluntly wedgeshaped. and slightly long- 

 er than preceding joints ; the third (syzygies) and fourth , 

 short and oblong. The next few joints have slightly obli- 

 que terminal faces , and the following ones are smooth , 

 short, and sharply wedgeshaped, becoming shorter and 

 blunter about the fortieth joint and squarer towards the 

 ends of the long arms. 



First syzygium on the third brachial ; the next usually 

 between 8 and 17; then an interval of 4 — 11, usually 

 6 — 8 joints between successive syzygia. 



The first two pinnules are moderately short and slender , 

 the size increasing up to those borne on the sixth , seventh , 

 and eighth brachials. These have wide basal joints, the 

 later ones being longer and tapering rather rapidly. 



Notes from the Leyclen IVIuseuni, Vol. III. 



12 



