638 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



5 mm. in length. The disk is more or less granulated, always finely, the granulation 

 appearing dustlike. The 23-armed example has an arm length of 105 mm. There 

 are 3 IIIBr 4 (3 + 4) series. The cirri are VII. The color in all as preserved is dark 

 brown. 



The specimen from off Contors Island has several IIIBr series developed. 



The example from Investigator station 7 has 8 IIIBr 4 (3 + 4) series developed, 

 and 2 IIBr series lacking. Two of the IIBr series are 2. 



The specimen taken at the surf line in the Andamans has 28 arms 110 mm. 

 long. The 3 other specimens from the Andamans are small and medium sized. 



The 2 specimens from the Nicobar Islands, which bear Liitken's manuscript 

 name Actinometra mutabilis, both have 20 arms. One has all the division series beyond 

 the IBr series 4 (3 + 4). The arms are 50 mm. long, and the cirri are IX, 12-13, 

 5 mm. long. The other has 6 of the IIBr series 2 and four 4 (3 + 4). The arms are 

 105 mm. long. There are no cirri, the centrodorsal being small and very thin, roughly 

 circular, and separated from the radials by deep clefts which are bridged over at the 

 angles of the calyx by the ends of the basal rays. 



Carpenter mentioned one of these specimens as a tridistichate individual which 

 he found under the name of Actinometra mutabilis in the Copenhagen Museum, and 

 said that he subsequently saw a similar one in Vienna. He remarked that the 

 brachials are rather long in both cases, and said that without making a renewed 

 examination of the specimens he would not like to speak positively as to their nature, 

 "but they must certainly belong either to Actinometra quadrata or to Actinometra 

 parvicirra." 



The specimens from Singapore are all medium sized or small. 



The specimen from Sumatra has 18 arms, one of the rays having no IIBr series. 

 Of the 8 IIBr series, 7 are 4 (3 + 4) and 1 is 2. The centrodorsal is a very thin, 

 irregularly rounded plate which is not quite sunken to the level of the radial pentagon. 



The example from Sebesi Strait has 21 arms. 



The specimen from the Danish expedition to the Kei Islands station 74 has 20 

 arms; of the 9 IIBr series present, 8 are 4 (3 + 4) and 1 is 2; there is a single IIIBr 4 

 (3 + 4) series externally developed. The specimen from station 104 has 23 arms, of 

 which the longest are 110 mm. long. All the division series are 4 (3 + 4). There 

 are III small weak cirri, and in addition some rudimentary. 



The specimen from Siboga station 315 has 15 arms 30 mm. long. Three of the 

 IIBr series are 2 and 2 are 4 (3 + 4). 



Of the specimens from Siboga station 40, one has 21 arms 70 mm. long. Nine of 

 the IIBr series are 2, and only one is 4 (3 +4). There is a single IIIBr series, devel- 

 oped internally. The other, which is similar, also has 21 arms. All 10 of the IIBr 

 series are 2. The single IIIBr series is 4 (3 + 4). 



The specimen from Siboga station 43 is small, with 17 arms and V cirri. 



The example from Siboga station 310 is small, with 13 arms, and is undergoing 

 adolescent autotomy. There is a single IIBr 2 series bearing 2 IIIBr 4 (3 + 4) series. 



One of the specimens from Maumeri has 21 arms 80 mm. long. Three of the 

 IIBr series are 2, all the other division series being 4 (3 + 4). The single IIIBr series 

 is externally developed. The cirri are XIV and are slightly larger than usual. The 



