104 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



at first consists of a minute transverse spiny ridge narrowing on about the eleventh 

 to a simple terminal spine. The distal cirrus segments are from one-half to one- 

 third again as broad as long, the length of their dorsal spines being from one-quarter 

 to one-third the width of the segments. 



The opposing spine is a little smaller and sharper than the spine preceding. The 

 ternimal claw is two-thirds again as long as the penultimate segment and curved. 



The radials are visible as narrow bands. The IBr, are three times as broad as 

 long and are united proximally. Like all the ossicles in the proximal portion of the 

 arms, they have the ends somewhat thickened and everted and finely spinous. There 

 is a distinct synarthrial tubercle. The IBra (axillaries) are triangular or low 

 pentagonal, three times as broad as long. 



The 18 arms are 80 mm. long. After the seventh the brachials have oblique ends 

 which are thickened, overlapping, and spinous. 



In some exceptional cases brachials 1+2 and 3+4 are united by syzygy on the 

 inner arms. The distal intersyzygial interval is 5 or 6 muscular articulations. 



Combs extend as far as Pj or Ps. Pi is 9.5 mm. long with about 37 segments, of 

 which 17 or 18 bear teeth. P3 is 6.5 mm. long with about 35 segments, of which about 

 20 bear teeth. P4 has 37 segments, of which the eleventh and following bear teeth. 

 Ps has about 30 segments, of which the twelfth and following bear teeth. Pj is 4.5 

 mm. long with 28 segments, of which 15 bear teeth, or with 17 segments and no comb. 

 The teeth of the combs are narrow and fairly high, the height reaching about two- 

 thirds the width of the segments. P? is 4.2 mm. long with 16 segments, and Pg is 

 the same length with 15 segments which are not longer than broad; the proximal 

 segments bear a spinous carination. The distal pinnules are 5 mm. long with 18-20 

 segments, of which the terminal 4 or 5 have paired dorsal hooks. 



The disk is 10 mm. in diameter and the anal tube is 2.5 mm. high. The mouth 

 and anus are subcentral. There are no calcareous granules. 



The second specimen from station 59 has 16 arms 65 mm. long; 6 of these are 

 young regenerating arms. The cirri are XX, 14-18, from 6 to 12 mm. long, in 1 and 

 an incomplete second row. The combs extend to P4. Pi is 6 mm. long with 31 seg- 

 ments, of which 15 bear teeth. Pj is 5 mm. long with 30 segments, of which 17 

 bear teeth. P4 is 4.2 mm. long with 23 segments, of which 14 bear teeth. The 

 teeth are narrow and pointed. P5 is 4 mm. long with 13 teeth. The proximal 

 portion of the arms is somewhat smoother than is the case in the preceding 

 specimen. 



Gisl^n also refers to this species a 10-armed specimen from this station which 

 differs from those described chiefly in being smaller. 



In a specimen from station 56 the centrodorsal is only very slightly convex, 1 mm. 

 in diameter. The cirri are XXV, 16 (the dorsal 13), from 6 to 9 mm. in length, 

 arranged in 2 rows. Three of the cirri are very small. In the cirri the first 2 segments 

 are short, the thLrd is half again as long as broad and slightly constricted centrally, 

 and the fifth and sixth are twice as long as broad, with expanded distal ends. The 

 sixth has a spinous transverse ridge, which on the segments following narrows and 

 on the tenth becomes a simple dorsal spine equal in height to one-quarter the width 

 of the segment. The terminal claw is half again as long as the preceding segment, 

 blunt, and somewhat curved. 



