2 1 '2 ACTINOM KTüA liliN S KTTI . 



but are thickened aud turned upwards at the angles which 

 appear as five small tubercles around the edge of the cen- 

 trodorsal. It also differs from Act. Bennetti which has a 

 much larger number of cirrlii , in the rays aud their sub- 

 divisions being more closely united, the arm-joints less 

 spiny , and the lower pinnules more massive. 



19. Actinonietra Bennetti^ Mus. Leyd. sp. 



1841. Alecto Bennetti., Muller. Monatsbericht d. BerHn. 

 Akad. 1811. p. 187. Wiegman's Archiv. 1841. 

 I. p. 146. 

 1849. Comatula Bennetti, Muller. Abhandl. d. Berlin. 



Akad. 1849. p. 264. 

 1862. Comatula Bennetti, Dujardin. Hist. nat. des Zoo- 

 phytes. Echinodermes , p. 208. 

 1866. Actinometra Bennetti, Böhlsche. Wiegman's Archiv. 



1866. I. p 90. 

 1879. Actinometra Bennetti, P. H. Carpenter. Trans. Linn. 



Soc, Ser. 2. Zool. II. p. 27. 

 Centrodorsal large , convex , hollowed in the centre , with 

 two or tliree irregular rows of cirrhus-sockets on its sides , 

 and its angles produced into short processes above which 

 the ends of the basal rays are sometimes visible Cirrhi 

 40 — 50, of about 25 rather stout joints: the fifth or sixth 

 is slightly longer than broad , the next three or four slightly 

 the longest and the following ones decreasing very grad- 

 ually, nearly all of them being longer than broad. The 

 terminal joints are slightly compressed aud the penultim- 

 ate has a very faint opposing spine. Portions of the 

 first radials are just visible at the angles of the calyx: 

 the second , which are partially concealed by the large 

 centrodorsal have curved proximal edges and are more 

 or less united laterally; the axillaries broadly pentagonal, 

 with incurved distal edges. 70 — 80 arms, the rays divid- 

 ing four or sometimes five times. Each division of 

 o 



three joints, the axillary with a syzygy. The perisome 

 uniting the rays and their divisions, is more or less plated 



Notes from the Leydeii IMuseuni, Vol. III. 



