276 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



The specimen from Misaki recorded by Dr. H. L. Clark has the arms about 225- 

 230 mm. long. The cirri are XXVIII, 29-35. The color in alcohol is uniform deep- 

 yellow. 



One of the two specimens from Sagami Bay collected by Prof. Franz Doflein has 

 the arms 230 mm. in length and the cu-ri XL VIII, 37-43, the longest about 55 mm. 

 long. The dorsal pole of the centrodorsal is 7 mm. in diameter. The color in alcohol 

 is a uniform dark yellow brown. This is a magnificent and quite typical specimen. 

 The second specimen is similar, but smaller. The arms are 200 mm. long, and the 

 cirri are 40 mm. long and are composed of 29-30 segments. The color is deep purple. 



The nine specimens from Bock's station 27 according to Dr. Torsten Gisl^n show 

 the following characters: 



1. The centrodorsal is discoidal, the flat dorsal surface, which is 10 mm. in diam- 

 eter, showing slight radiating swellings. The cirri are arranged in two rows. The 

 cirri are XLIII, 36-39, about 40 mm. long. The cirrus segments are subequal, about 

 as long as broad, or fi-om one-half to one-third again as broad as long. The terminal 

 claw is a little longer than the penultimate segment. The apical cirri are shorter 

 than the others, and have fewer segments. The radials project somewhat beyond 

 the centrodorsal in the interradial angles. The IBri are six times as broad as long, 

 and are in close lateral apposition. The IBr2 (axillaries) are three times as broad 

 as long, pentagonal or almost triangular, with a small median tubercle well marked 

 off from the IBri. They are in close lateral apposition. The articulations between 

 the proximal ossicles are indistinct. These proximal ossicles are flattened and 

 granular as is often the case, according to Gislen, in Oligometrides. The 10 arms are 

 190-210 mm. long. The first brachials are 5.5 nam. broad, and are united interiorly. 

 The first two brachials are twice as long exteriorly as interiorly. All the distal bra- 

 chials are short and discoidal, four times as broad as long. There are 14 brachials 

 for each 10 mm. of arm length, or 12 if the syzygial paii-s are counted as units. On 

 one arm taken as a sample syzygies occur between brachials 3+4, 8+9, 13 + 14, 

 30 + 31, 39+40, 50 + 51. On another they occur between brachials 3+4, 9 + 10, 

 15+16, 28+29, 41+42, 51 + 52. The distal intersyzygial interval is about 8 muscular 

 articulations. Pi is 20 mm. long with 25-27 segments. Pa is 26 mm. long with 34 

 segments which are half again as long as broad. The pinnules from P2 to Pio are 

 larger and stouter than the pinnules following, and decrease slowly in length. The 

 ambulacral furrow does not appear until P9 or Pn, except on one arm that is shorter 

 than the others. The distal pinnules are 15 mm. long with about 35 segments which 

 are from half again to twice as long as broad, and of which the last 3-5 have weak 

 dorsal hooks. The disk is 22 mm. in diameter. The mouth is subcentral. The 

 anal cone is 5 mm. long. The color is dark chocolate-violet. 



2. The dorsal pole of the centrodorsal is 5 mm. in diameter. The cirri are XXX, 

 34-40, from 30 to 50 mm. long. The arms are 150-180 mm. long. P, is 22 mm. 

 long with about 30 segments. P2 has about 30 segments. The distal pinnules are 

 14 imn. long with about 30 segments. The pinnules of the first eleven pairs are with- 

 out ambulacral grooves. 



3. The dorsal pole of the centrodorsal is 7 mm. in diameter. The cirri are XLV, 

 34-38, from 32 to 42 mm. long. The arms are 130-250 mm. long. Pj is 26 mm. 

 long with 34 segments. P, is 30 mm. long with 42 segments. The distal pinnules 



