5. Decametra informis (P. H. Carpenter). 



P. H. Carpenter. a Challenger" Reports. The Comatulae, 1888, p. 205, pi. 33, fig. 3 {Antedon 

 informis). 



I have at hand a specimen of this species from the Gulf of Davao, Philippine Islands, v 

 dredged in 23 fathoms (" Albatross" Stat. 5249; Cat. N° 35282 U.S. Nat. Mus.). 



Colobometra A. H. Clark. 



Key to the Species of the Genus Colobometra. 



a 1 Cirri very long with about 60 (53 — 65) segments of which the longest are 

 one third again as long as broad ; P 3 slightly larger than P 2 ; following pin- 

 nules to P B or P 8 similar, slightly decreasing in length (M oluccas and New 

 Guinea to New South Wales and Lord Ho we Island) . . . perspinosa a ) 

 a 2 Cirri shorter, with not more than 5 2 segments ; P., not longer than P, 



b 1 44 — 52 cirrus segments,' none of which are as long as broad; P :i similar 

 to P„ and of the same length; P. t similar, but shorter; Pj not greatly 

 stiffened, composed of segments which become twice as long as broad 



on the sixth and following (M oluccas to Singapore) vepretuiit 



b 2 not more than 40 (29 — 40) cirrus segments, of which the longest are 

 longer than broad 



c 1 P 3 markedly longer and stouter than the succeeding pinnules; P 3 

 similar to P„ but shorter and more slender; 29 — 40 (usually about 

 35) cirrus segments of which the tw'o or three before the penultimate 

 bear single median dorsal spines (Ceylon and the Bay of 

 Bengal to the Lesser Sunda Islands, Borneo and the 



Philippine s) discolor 



c a P„ to P. or P 7 approximately equal in length and stoutness 



d 1 Pj resembles P 3 and is stiff and spine-like with 10 segments 

 of which the fourth and following are about four times as long- 

 as broad; only the antepenultimate cirrus segment bears a 

 single median dorsal spine ; P 3 to P :> similar and of approxim- 

 ately equal length (Solomon Islands). . ." . . . . diadema 

 d 3 Pj is much less stiff than P c , and is composed of 2 1 segments 

 none of which are more than very slightly longer than broad ; 

 the 18 — -22 segments before the penultimate bear single median 

 dorsal spines; P 2 to P 7 approximately equal in length and 

 similar, with a very slight development of spines on the distal 

 borders of the component segments (Philippine Islands) suavis 



1) Synonyms Antedon insignis Bell. and Antedon /oven! Bell, 18S4 (not Antedon lovéni Bell, 1882 = Antedon pumila Bell, 1SS4). 



