496 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



The specimen from Siboga station 144 has between 90 and 100 arms which are 

 about 90 mm. long. Four of the IIIBr series are 4 (3 + 4). The centrodorsal is 

 very small and stellate. The color in alcohol is a uniform yellow brown. 



According to Carpenter the Challenger specimen from Banda has the centro- 

 dorsal stellate without traces of cirri and sunken a little below the level of the radial 

 pentagon, the inner sides of which are somewhat cut away. 



The IBri are relatively long and are incompletely united laterally. The post- 

 radial series are quite free and may divide five times. The IIBr series are 4 (3+4). 

 The IIIBr series are 2. The IVBr series are 4 (3+4). The VBr series, when present, 

 are 4 (3+4). 



The arms are very numerous, IS or 20 to the ray, 90 mm. long. All of the arms 

 are grooved, but the hinder arms are only faintly so and are very narrow and short, 

 with from 100 to 120 slightly overlapping brachials. The anterior arms have rather 

 more bracliials. The lower brachials are shortly triangular, becoming more oblong, 

 and finally nearly square. 



Syzygies occur between brachials 3 + 4, 13 + 14, and 18+19, and distally at 

 intervals of 4 or 5 muscular articulations. 



The pinnules on the IIBr2 and IVBr2 are about equally long, reaching 12 mm. 

 The following pinnules are considerably shorter, diminishing to that of the third 

 brachial, which is the smallest. From that point the length increases shghtly, but 

 the pinnules are always comparatively short. The lower pinnules have a terminal 

 comb as far as the fourth or fifth brachial, which is continued at intervals to the 

 eleventh or twelfth. 



The disk is 30 mm. in diameter, and is naked except for a few granules near the 

 anal tube. The mouth is radial. 



The color in alcohol is dark blackish brown. 



In Carpenter's figure, 2 of the IIIBr series are shown as 4 (3+4), each of these 

 IIIBr 4 (3+4) series being followed by 2 IVBr 2 series. In all other cases the 

 division is regular. 



The specimen from Siboga station 240 is typical, with about 100 arms wliich 

 are about 120 mm. long. 



The specimen from off Neira, Banda, in about 10 meters, has about 90 arms 

 140 mm. long. All 10 of the IIBr series are 4 (3+4). Of the 20 IIIBr series, 18 are 

 2, and 2, which are situated side by side, are 4 (3+4), both of these being on the same 

 IIBr series. The IVBr series are all 4 (3+4) except that following the outer IIIBr 

 4 (3 + 4) series. There are 2 IVBr 2 series. The VBr series are almost equally 4 

 (3+4) and 2, though the latter are in a slight majority. The VIBr series, when 

 present, are 4 (3 + 4). The centrodorsal is very small, sharply stellate, and is scarcely 

 raised above the dorsal surface of the radial pentagon, from which it is separated 

 by subradial clefts bridged over interradially by the ends of the basal rays. A 

 single small defective basal segment of a cirrus remains. By its side is a minute 

 bud representing a single cirrus segment, and there are 2 similar buds in other radial 

 areas. The specimen from off Banda in about 20 meters has about 70 arms. The 

 centrodorsal is very small and stellate. 



According to Professor Koehler, one of the specimens from the Bay of Amboina 

 has the centrodorsal pentagonal rather than stellate. The color in alcohol is gray. 



