48 



i which |)iiim the perisome is solidl) plated; the centrodorsal 

 inken within the radial circlet; on three of the rays the IIIBr 



on one ray 2 4 (3 + 4)— 4 (3 + 4)— 4 (3 + 4); and 



the fifth i 



1 Stat. 303 is fully grown, but carries eight more or less rudi- 



:ri. 



iiulivitlu.il from Binongka has 70 anus im mm. long; the centrodorsal is 

 idal, with the flat dorsal pole 3.5 mm. in diameter: the cirri are XIV, 14 -15, 

 the colour is whitish, the division series heavily blotched with dark gray; the 

 r part of the arms is dark gra) ; the outer part of the pinnules is brown. 



The smaller specimen from Binongka has 62 arm 95 mm. long; it closelv resembles 



iwing; there is usually one more division series on the outer branch of tin- IIIBr series 



than elsewhere; the arms are less developed and more slender than in the preceding, and the 



and division series are less broad; the centrodorsal is thin-discoidal, with the dorsal pole 



; mm. in diameter; the cirri are XI, with some additional rndimentary, 14 — 15, 10 mm. to 



1 2 mm. long. 



The example from Batavia Bay has about 70 arms 85 mm. long; the rays and division 

 series ,ue comparatively narrow and wel! separated dorsally: the interradial perisome is heavily 

 plated. the cirri are XIV, with others more or less rndimentary, 14 — 16, 10 mm. to 12 mm. 

 long; the colour is slaty gray. 



Comanthus A. 11. Clark. 

 Key to the Sul genera of the Genus Comanthus. 



a 1 Cirri always present, numerous, evenly distributed about the periphery of the 

 centrodorsal, usually stout, compressed distally, except in two species with more 

 than 20 segments; IIBr series almost invariably 4 (3 + 4) Cenolia 



. < irri few, small, weak, with the distal segments only slightly shorter than the 

 proximal and only slightly compressed, irregularly distributed about the periphery 

 "i the centrodorsal, or absent altogether ; one or more of the IIBr series 2 

 instead of 4 (3 -f- 4) Vania 



Key to the Species of the Genus Comanthus. 



ent 



irri entirely without dorsal processes, large, stout, well developed, numerous, 



mpo ed of 20 — 30 segments (usually 25 — 30) of which the outer are 



illy only slightly shorter than the proximal; centrodorsal very large, 



hemispherical, with a deeplv concave dorsal pole; 60 to [20 (usually more 



arms from 130 mm. to 160 mm. in length (Queensland and 



the Loyalty Islands to the Andaman Islands and Singapore, 



nd northward to the Pelew and Marshall Islands) .... bennetti 



