ANTEDON FLAGELLATA. l8o 



5. Antedon flugellttlu , Mus. Leyd. sp. 



1841. Alecto Jiagellata, Muller. Monatsbericht d. Berliu. Akad. 

 p. 186. — ld., Wiegman's Archiv. 1841,1, p. 145. 



1849. Comatula Jiagellata^ Muller. Abhandl. d. Berlin. 

 Akad. 1849, p. 263. 



1862. Comatula jiagellata, Dujardin. Hist. nat. des Zoophy- 

 tes. Echinodermès , p. 206. 



Description of aii individual. 



Centrodorsal moderately thick , with a smooth dorsal surface 

 and three irregular rows of cirrhi on its sides. About 40 cirrhi, 

 of 25-35 tolerably equal joints, hardly any of which (in mature 

 cirrhi) are longer than wide. The lowest joints are short, 

 the length increasing gradually up to the tenth joint which 

 is about square. The next two or three joints are of the 

 same shape or a trifle longer , after which the length grad- 

 ually decreases and a blunt dorsal spine appears near the 

 distal ends of the joints. It increases slightly in size for 

 two or three joints , then diminishes and comes to be nearer 

 their proximal ends, reappearing on the penultimate joint 

 as a moderately strong opposing spine. 



The first radials are scarcely visible even at the angles 

 of the calyx; the second and third very convex, the for- 

 mer in close contact laterally ; the latter less than twice 

 their length , almost triangular , with very open angles. 



38 arms, each of about 200 joints. The rays may di- 

 vide four times, each division of two joints, the axillary 

 not a syzygy , short and wide with an open angle. The 

 first joints after each division closely united laterally, and 

 slightly raised in the middle of their junction with their 

 successors. 



The first three or four brachials on the two outer arms 

 of each ray have their outer sides flattened where they are 

 opposed to their fellows of the next ray. First brachials 

 rhomboidal; the second shorter and more wedgeshaped. 

 Tbe third a syzygy and more nearly oblong; the next 



Notes from the Leyden JMuseum, Vol. 111. 



