432 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



One of the specimens from Singapore may be described as follows: The centro- 

 dorsal is minute and sharply stellate. The radials are trapezoidal, distally about 

 twice as broad as their length. The IBrj are short, oblong, four or five times as 

 broad as long, in apposition in their basal half but free distally. The IBr2 (axillaries) 

 are almost triangular, twice as broad as long. The IIBrz series are 4 (3+4). The 

 IIIBr and following division series are 2 (1 + 2). Beginning on the IIBr axillaries, 

 the successive division series form 2 diverging arm trunks, from which on every other 

 ossicle arms are given off on alternate sides, the first being always external; the 

 arm trunks terminate in a pair of similar arms. There are 4 or 5 (usually 4) postradial 

 axillaries. 



The 58 arms are 125 mm. long. The first 2 bracliials are small and wedge- 

 shaped, the next 3 are oblong, half again as broad as long, and those following become 

 triangular and about as long as broad, toward the middle of the arm wedge-shaped 

 and about as long as broad, and in the terminal portion wedge-shaped and longer than 

 broad. The elements of the division series, and especially the brachials, have everted 

 and finely spinous distal ends, which give the animal a characteristic rough feeling 

 and appearance. 



Pd is very slender, 15 mm. in length, with a peculiar abrupt comb at its distal 

 end which is composed of 13 large and long curved teeth. The proximal brachial 

 pinnules are exceedinglj^ slender and hairlike. Pi is from 10 to 12 mm. long. P2 

 is 8 mm. long. P3 is 5 mm. long. All of these pinnules bear combs similar to that 

 on Pd. The following pinnules are stouter, after Ps without terminal combs and 

 about 7 mm. long, distally becoming more slender and increasing in length to 10 mm. 

 The distal pinnules are composed of elongated segments with swollen articulations; 

 the end of each segment is armed with long coarse spines, and the surface is thickly 

 covered with shorter spines. The terminal 3 or 4 segments bear several long recurved 

 spines dorsally. Perfectly formed terminal combs appear at intervals on the distal 

 pinnules. 



The other specimen from Singapore is smaller. It has about 80 arms. Eight 

 of the IIBr series are 2, and only 2 are 4 (3 + 4). In other respects this specimen 

 resembles the preceding. 



In one of the specimens from Lontor, Banda, there are 64 arms 170 mm. long. 

 All of the IIBr series are 4 (3 + 4). The division series and arms are very slender. 

 The centrodorsal is exceedingly small and is sharply stellate. 



A similar specimen from Lontor has 72 arms 170 mm. long. Of the 10 IIBr 

 series 6 are 4 (3 + 4) and 4 are 2. The centrodorsal is exceedingly small and sharply 

 stellate. 



The third specimen from Lontor has 52 arms 170 mm. long. Of the 10 IIBr 

 series 6 are 4 (3 + 4) and 4 are 2. The centrodorsal is extremely small and sharply 

 stellate. The radials are twice as broad distally as their median length. As in the 

 other 2 the division series are very narrow and the arms are exceedingly slender. 



One of the specimens from Soutre, Banda, has 71 arms 150 mm. long. The 

 centrodorsal is greatly reduced and is very sharply stellate. Of the 10 IIBr series, 

 9 are 4 (3 + 4) and 1 is 2. The succeeding division series are all 2, except for a single 

 IIIBr series, which is 3. The IIIBr axillaries carry a IVBr series interiorly and an 



