190 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



In life the cirri were yellow, the arms and disk greenish, the first with a few, the 

 last with numerous irregular white blotches and dots; the pinnules were greenish 

 black, each segment narrowly banded with white. 



The specimen from Siboga station 274 has 20 arms 110 mm. long; there are 4 

 IIIBr series present, 3 internal and 1 external, the last paired with one of the internal. 

 The cirri are XVII, 23-25, 20 mm. long; the longest cirrus segments are about one- 

 third again as long as broad. 



The details of the 8 specimens from Siboga station 273 are as follows : (1 ) Twenty- 

 five arms 50 mm. long; of the 5 IIIBr series 4 are on 2 of the IIBr series and the fifth 

 is externally developed. The cirri are XVI, 23, from 13 to 15 mm. in length; the 

 longest cirrus segments are not over one-third again as long as broad. (2) Eighteen 

 arms 65 mm. long; there are no IIIBr series; the brachials are short triangular. 

 (3) Sixteen arms 60 mm. long; the brachials are short triangular. The cirri are XX, 

 16-18, 10 mm. long; the longest cirrus segments are not more than one-third again 

 as long as broad. (4) Fifteen arms 80 mm. long; the brachials are short triangular. 

 The cirri are XXIV, 17-21, 13 mm. long; the longest cirrus segments are about 

 one-third again as long as broad. (5) Fifteen arms 65 mm. long; the brachials are 

 short triangular; there is one IIIBr series, 3 (2 + 3), internally developed. The cirri 

 are XX, 16-19, 10 mm. long; the longest cirrus segments are not more than one-third 

 again as long as broad. (6) Fifteen arms 56 mm. long; the brachials are more nearly 

 discoidal than in the preceding. The cirri are XXII, 19, 12 mm. long; the longest 

 cirrus segments are less than one-third again as long as broad. (7) Fourteen arms 

 55 mm. long; the brachials are short triangular. The cirri are XXIV, 15-16, 10 mm. 

 long; the longest cirrus segments are half again as long as broad. (8) Fourteen arms, 

 small, undergoing adolescent autotomy. The longest cirrus segments are twice as 

 long as broad. The disk bears about 24 large conical calcareous tubercles irregularly 

 scattered over the anal area, and many small calcareous nodules on and at the base 

 of the anal tube. 



As described by Prof. F. J. Bell, the type specimen of coppingeri has the centro- 

 dorsal small; the cirri are XVII-XX, 17-20, arranged in two rows on the centrodorsal; 

 the fourth-sixth cirrus segments are longer than broad, the rest not so long as broad ; 

 the spines, including the opposing spine, are obscure. 



The radials are scarcely visible. The IBrj are three times as broad as long, 

 partly in contact laterally. The IBr 2 (axillary) is almost triangular. The specimen 

 has 12 arms, "but the normal number is probably 10." The first and second brachials 

 are longer outwardly than inwardly; the first are in contact interiorly. The third and 

 fourth brachials (according to Professor Bell) form an oblong syzygial pair. The 

 next two brachials are oblong, those succeeding wedge-shaped with the distal edges 

 slightly dentated ; further out the brachials become more regularly oblong. 



Syzygies (according to Bell) occur between brachials 3 + 4 and 11 + 12, and 

 distally at intervals of about 6 muscular articulations. 



Of the pinnules Professor Bell says "First pinnules on the third brachials longer 

 than the second, and the second a little longer than the third ; the fourth again rather 

 longer. The succeeding ones of a fair length." 



He gives the arm length as atout 70 mm., the cirri as 7.5 mm. long, and the 

 diameter of the disk as 4.5 mm. 



