268 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



increases to about 13 mm. in the distal portion of the arms. All the pinnules in about 

 the proximal half of the arms seem to be rather stiff, and this, taken in connection 

 with the uneven dorsal sculpture of the arms, gives the animal a robust and spiny 

 appearance. The disk is lacking. The color is white, the tips of the cirri dorsally 

 and the ambulacral grooves tinged with violet. 



This specimen was recorded by Dr. Reichensperger under the name of Craspedo- 

 metra anceps, but he referred it to this species with reservations and suggested that 

 if it proved to represent a new species, as he was fairly sure it would, it might bear 

 the name of Craspedometm aruensis. He said that it could not be confused with 

 acuticirra (from Sydney) or with amboinae, but that it bears a certain similarity to 

 anceps although the cirri are about twice as numerous and are composed of more 

 numerous segments, the pinnules are markedly longer with more numerous segments 

 and are quite different in their relative length and stoutness, while it seemed to him 

 that the lateral compression of the brachials and the strong convexity of the distal 

 portion of the arms are in no previously described species so pronounced as they are 

 in this specimen. The figure he gave of the lower pinnules shows that these are of the 

 type characteristic of, and peculiar to, H. crenulata, and the description in all its 

 details applies perfectly well to certain forms of this highly variable species. 



Professor Koehler's specimen from Biliton was much mutilated, most of the 

 arms having been broken off while only a single cirrus remained intact. There were 

 XXII cirri. The radials are barely visible. There are one or two IIIBr series on 

 each postradial series six IIIBr series in all. Presumably, therefore, there were 

 26 arms. The dorsal surface of the elements of the IBr series, the two first elements 

 of the IIBr series, the IIIBr series, and the first two brachials is strongly sculptured. 

 The lateral borders of the brachials are swollen and prominent. The second syzygy 

 is at about the sixteenth brachial. P! is very small, with at the most 25 segments. 

 The. pinnules following, which are larger, bear lateral processes on their segments 

 which have the form of those figured by Bell for his Antedon irregvlaris. The general 

 color is gray. 



The specimen from Pocock Island has 20 arms 110 mm. long. Three IIBr 

 series are lacking, but this deficiency is compensated by the development of three 

 IIIBr series. The seven IIBr series are extraordinarily irregular. One is 8 (3+4; 

 5+6; 7+8), one is 2, one is 4 with the two distal elements united by synarthry, and 

 four are 4 (3+4). The three IIIBr series are also irregular; one is 1, one is 2, and 

 one is 4 (3+4), the last two being on a single postradial series on which the IIIBr 2 

 series is internal and the IIIBr 4 (3+4) series external. This example agrees with 

 others from Singapore in the collection of the Copenhagen Museum, and with others 

 from Australia in the collection of the Australian Museum. 



The specimen from South Nilandu recorded by Bell I have not seen. He said 

 that it was taken among living corals at the seaward end of a passage, but gave no 

 notes on it. I have grave doubts concerning the correctness of the determination, 

 as the Maldive archipelago lies considerably west of the Andamans, which represent 

 the western limit of the range as outlined by specimens I have been able to examine. 



Color in life.- Dr. H. L. Clark wrote that some half dozen specimens dredged 

 on Pearl Shoal outside Roebuck Bay seemed at the moment the most lovely comatulids 

 he had ever seen. The arms were a pure milk-white, the cirri bright rose-red in sharp 



