/ 7 



d'- larger and more robust, with from 14 to 26 (usually from 15 to 

 20) arms from 100 mm. to 150 mm. long; division series and 

 arm bases very rugged, the segments swollen, with prominent 

 synarthrial and articular tubercles; lower pinnules stout, with the 

 distal portion, or all, of the prismatic ridges on the segments 

 produced into broad rounded lateral pröcesses, giving the pinnules 

 a strongly serrate profile; cirri moderately stout with 35 — 45 

 (usually about 40) segments (Northern Australia to Pocock 

 Island, Singapore and the Philip pin e Islands) . . . crenulata 1 ) 

 a 2 Enlarged proximal pinnules with prominent keels on the distal border of 

 the segments 



b 1 IIIBr series present, 4 (3 + 4); cirri with 30 — 44 (usually 35 — 40) 

 segments, none of which are quite so long as broad; 20 — 25 arms 

 150 mm. long; division series and first two brachials in close lateral 

 apposition and laterally flattened; only the carinate pröcesses of the 

 lower segments of Pd are visible between the IIBr series (Andaman 



Islands t o Java and the M a 1 a y P e n i n s u 1 a) philiberti ~) 



b- IIIBr series 2, or absent 



c 1 the outer cirrus segments bear long and prominent sharp dorsal 

 spines, which begin abruptly 



d 1 cirri very stout, all the component segments much broader than 

 long; 12 — 13 arms 170 mm. to 180 mm. long; cirri XV, 30 



(Maldive Islands) flora 



d~ cirri slender, or moderately stout, the longest earlier segments as 

 lono- as or lonoer than broad 



e 1 20 — 23. arms 120 mm. to 125 mm. long; brachials in the 

 outer half of the arm oblong and very short; cirri about one 

 sixth of the arm length, composed of 25 — 32 (usually 27 — 30) 

 segments (G er man Southeast Africa, Zanzibar, and 



British E ast Africa) africana 



e 2 11 — 13 arms 



f 1 brachials in the central and outer part of the arm exceedingly 

 short and discoidal ; radials with a row of bead-like tubercles 

 along the distal border; cirri XV, 26 — 35 (usually 30 — 35), 

 about one fourth of the arm' length ; P 3 and P„ composed 



of 18 — 25 segments (sout h er n Japan) scklegelii 



{- brachials in the central and outer part of the arm wedge- 



1) Includes Comatula dubia von Graff, 1877. Antedon decipiens and ./. irregularis Bell, 1884, Antedon èidentata von Graff, 

 1884, Antedon dubia F. II. Carpenter, 1888, and Crasfedometra aliena A. II. Clark, 1909, with the exception of the ten armed specimens 

 mentioned in the description of the last named. 



This species has usually been recorded as Antedon (or Amphimetrd) varüpinna^ but it is not Antedon variipinna P. H. Carpenter, 1882. 



2) Includes Ampkimetra mortenseni A. II. Clark, 1909. 



