596 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



Notes. — As described by Dr. H. L. Clark, the specimen from Ceylon has 25 

 arms, and the cirri are XXIV, 15-17. 



The specimen from Invisible Bank is slightly larger than any of those at hand 

 from Samoa. The 20 arms are 70 mm. long. The bare polar area of the centrodorsal 

 is 3 mm. in diameter. The cirri are XXV, 13-14, 9 mm. long, and are arranged in 

 a single crowded and irregidar row. 



The specimen from Siboga station 50 has 20 arms 80 mm. long. All of the 

 IIBr series are present, and all are 4 (3 + 4). 



The example from Siboga station 299 has 20 arms 65 mm. long. All of the 

 IIBr series are present, and all are 4 (3 + 4). The cirri are XVII and are rather 

 more slender than usual. 



Hartlaub gives the following characters from the 12 specimens from Amboina 

 which he determined as Actinometra parvicirra typus A: 



The centrodorsal is fairly large, circidar, and flat. 



The cirri are XVI-XXV, usually 15-16, and are relatively thick. 



The radials, and sometimes even the IBri, are entirely concealed by the centro- 

 dorsal. The IIBr series are mostly 4 (3 + 4), and only a few specimens have some 

 of 2 elements. 



There are 20 arms, only 2 specimens having 21, resulting from the presence of 

 a single IIIBr series. 



The color is a fairly dark uniform chocolate brown. 



Hartlaub remarked that these specimens are in general markedly smaller than 

 those of typus B (parvicirra) and are characterized by the absence of IIIBr series, 

 which are very common in the latter. 



The specimen collected at Amboina by the Danish expedition to the Kei Islands 

 has 24 arms which are about 80 mm. long. Of the 10 IIBr series, 9 are 4 (3+4) 

 and 1 is 2. Of the 4 IIIBr series, 3 are 4 (3 + 4), all external, and 1 is 2, internal. 

 The cirri are XV, 11-12. The gonads are greatly swollen. Combs occur at intervals 

 to the ends of the arms as preserved. The color is dorsally brownish yellow, with 

 the centrodorsal and cirri lighter; the ventral surface and the gonads are violet. 



The specimen from Siboga station 162 is small, with 13 arms about 40 mm. long, 

 and is undergoing adolescent autotomy. 



The specimen from the Abrolhos Islands has 18 arms about 50 mm. long. The 

 IIBr series are all 4 (3 + 4). The cirri are about XXV, 17,12 mm. long. The longest 

 cirrus segments (the fourth or fifth) are twice as long as broad or slightly longer, and 

 the distal cirrus segments are twice as broad as long. The disk is thickly covered 

 with small but prominent calcareous nodules of approximately equal size. 



One of the 2 specimens presumably from Western Australia in the Copenhagen 

 Museum has 28 arms about 70 mm. long. The cirri are robust, XXIII, 13, from 8 to 

 10 mm. long. The other is similar. 



One of the specimens from Mer (541) is small, with 20 arms about 40 mm. long. 

 The 6 IIBr series remaining attached are all 2. There are no further division series. 

 The cirri are XIV, 13-15, strong and functional. 



