348 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



are separated in the mid-dorsal line by a light stripe. MuUer says that except for 

 the color scheme this form is veiy similar to C. 'purpurea. 



The single specimen from the Danish expedition to the Kei Islands station 

 20 is small. One of the specimens from station 30 has the anterior arms 120 mm. 

 and the posterior 50 mm. in length; the arms are much swollen. The cirri are VII, 

 11, small, weak, and strongly curved. The arms are rather narrowly banded light 

 and dark yellow brown. The other specimen is small. 



The largest specimen from Siboga station 162 has the anterior arms 135 mm. 

 and the posterior arms 85 mm. in length, all of the arms being very broad and stout. 

 Five of the arms are ungrooved- Another large specimen has the anterior arms 

 120 mm. and the posterior 60 mm. long; 5 of the arms ax'e ungrooved. A third 

 specimen has the anterior arms about 100 mm. and the posterior 00 mm. long, all 

 of the arms being stout and broad; 5 of the arms are ungrooved, and on the others 

 only the distal pinnules are grooved. A fourth, also of the broad-armed type, has 

 the posterior arms 60 mm. long, very stout, stouter than the anterior arms; 5 of 

 the arms are ungrooved; the cirri are X, 10-11, from 8 to 9 mm. long. A fifth 

 resembles the preceding. The 7 small specimens are similar. The broadening of 

 the arms is marked in individuals with an arm length of only 35 or 40 mm. 



In the specimen from Siboga station 164 the anterior arms are 120 mm. in length 

 and the posterior 70 mm. Six of the arms are grooved and four ungrooved. On 

 the former only the distal pinnules are grooved. All of the arms are rather stout, 

 but not excessively so. The centrodorsal is greatly reduced and bears only II cirri, 

 one 7 mm. long with 12 segments, the other 6.5 mm. long with 11 segments. There 

 are also two rudimentary cirri. The color is yellow brown, each articulation with 

 two dark spots, one on either side of the median line; the articulations in the basal 

 portion of the pinnules bear single dark spots. 



The 2 specimens recorded by Hartlaub from Amboina are remarkable for their 

 entirely white color as well as for the absence of a longitudinal band on the arms. 

 They are of rather small size and have relatively short arms, so that their appearance 

 is compact. 



Of the 2 specimens from Siboga station 273 the larger has the anterior arms 120 

 mm. and the posterior 45 mm. in length; the arms are moderately stout; 5 of them 

 are grooved and 5 ungrooved. The cirri are XIV, 10, from 7 to 9 mm. long. The 

 color is yellow brown, with a narrow mediodorsal line of lighter; the pinnules are 

 deep violet. The smaller specimen has the arms 80 mm. long, moderately swollen, 

 and the cirri XIII. 



Dr. H. L. Clark says of the 13 specimens from the Abrolhos Islands that he 

 examined, 9 from off Long Island and 4 from near First Island, that they are all 

 brown, pale brown, or yellow brown in color. They are all small, only 2 or 3 having 

 arms 100 mm. long. The cirri range from I to XIV, with the segments 10-14, but 

 in no case are they arranged in pairs at the corners of the centrodorsal. 



Dr. Torsten Gisl^n's redescription of this species, based on Mjoberg's specimens 

 from northwestern Australia, is as follows: 



The centrodorsal is discoidal, slightly sunken in the center, from 1.5 to 3 mm. in 

 diameter. In full-grown specimens it almost covers the radials, but in immature 

 individuals it leaves them bare. 



