258 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



they are crenulated. There are 20 arms. The arm bases are less rugged than those 

 of the preceding specimen. P 3 is about 20 mm. long with 22 segments; the eversion 

 and spinosity of the distal segments is not very prominent. The individual is young. 



In the specimen from Cambodia the cirri have been lost. The IIBr series are 

 4 (3+4). Of the five IIIBr series present, three are 2 and two are 4 (3+4). P 3 is 

 about 30 mm. long with 27 segments. The everted ends of the segments and the 

 tubercles are well developed. 



The four specimens from north of central Java are all small. 



One of the specimens from north of western Java has 10 and the other has 11 

 arms. The lateral processes on the segments of the proximal pinnules are strongly 

 developed but slender. 



One of the specimens from off Cape Jabung, Sumatra, has 22 arms. Of the ten 

 IIBr series present, nine are 4 (3+4) and one is 2. There is one IIIBr 4 (3+4) series 

 following a IIBr 2 series, and one IIIBr 2 series following a IIBr 4 (3+4) series. 

 Both of the IIIBr series are internally developed. 



One of the specimens collected by Svend Gad at Singapore has 19 arms 80 mm. 

 long. The cirri are XV, 31-34, 20 mm. long. P 2 is 13 mm. long, with 20-23 segments. 

 Six IIBr series are present on four postradial series of which five are 4 (3+4) and one 

 is 2. There is one IIIBr 2 series, developed internally. In alcohol this specimen is 

 flesh colored, with the arms crossed by purple bands. 



Another specimen from Singapore has 12 arms 80 mm. long and the cirri XIX, 

 32-35, 23 mm. long. There are two IIBr series developed on adjacent postradial 

 series. The color in alcohol is dark brown. 



A third specimen from Singapore has 15 arms 80 mm. long. There is a single 

 IIBr series on each postradial series. Of the five IIBr series tour are 4 (3+4) and 

 one is 2. The cirri are XVIII, 28-30, 20 mm. long. 



A fourth example resembles that immediately preceding and is of exactly the 

 same size with 16 arms. All the IIBr series are 4 (3+4). The cirri are XVIII, 

 30-35. Both of these specimens are flesh colored. 



A specimen from Singapore collected by Mr. Gad and dated October 23, 1910, 

 has 14 arms 62 mm. long. One of the IIBr series is 2. One postradial series bears 

 two IIBr series, both 4 (3+4). 



Another specimen with the same date has 14 arms 75 mm. long. The cirri are 

 XIX, 31, 20 mm. long. The dorsal pole of the centrodorsal is convex, 2.5 mm. in 

 diameter. 



Prof. F. Jeffrey Bell's Antedon decipiens was based upon specimens from the 

 Arafura Sea in 32-36 fathoms, Dundas Strait, and the Prince of Wales Channel. He 

 provisionally associated with it, as a variety, two specimens from Alert station 144 

 (probably Thursday Island). The characters he gave for Antedon decipiens are the 

 following : 



The centrodorsal is small, with the cirri arranged on three levels. The cirri are 

 about XX, 25, about 16 mm. long. The fourth-tenth segments are longer than broad 

 and those following, which gradually become shorter, are provided with a well-marked 

 spine. These spines decrease toward the end of the cirri, but the penultimate one is 

 larger again. The radials are quite distinct. The IBrj are oblong, three times as long 

 as broad (he meant as broad as long), partly in contact. The IBr 2 (axillaries) are 



