566 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



IIBr series are 4 (3 + 4). The IIIBr series are 4 (3 + 4), but are rarely present. The 

 division series are strongly rounded dorsally and laterally, and are widely separated 

 laterally. 



The arms are 13-40 (usually 20-25) in number, and from 80 to 120 mm. in 

 length. The first 2 brachials are subequal, shghtly wedge-shaped, twice as broad 

 as the exterior length. The first brachials are interiorly united basally. The first 

 syzygial pair (composed of brachials 3 + 4) is oblong, from half again to twice as 

 broad as long. The next 3 or 4 bracliials are oblong, twice as broad as long, those 

 succeeding becoming triangular, nearly as long as broad, and after about the middle 

 of the arm wedge-shaped and half again as broad as long. The fourth and fol- 

 lowing brachials have somewhat produced and finely spinous distal ends. 



Syzygies occur between brachials 3 + 4, again from between brachials 14 + 15 

 to between brachials 17 + 18, and distally at intervals of usually 4 muscular articu- 

 lations. 



Pd is 20 mm. long, rather stout basally but tapering rapidly in its proximal 

 third and becoming slender and delicate distally. The segments in the enlarged 

 proximal portion bear very high carinate processes which gradually die away as the 

 pinnule becomes more slender. The terminal comb arises gradually. It is composed 

 of 12-15 small, rounded and well separated teeth. Pi is nearly as long as Pd, but is 

 less stout basally. P2 is 12 mm. long, similar to Pi but much more slender. P3 is 

 10 mm. long, and is small and weak. The following pinnules are similar in length 

 to P3 but are slightly stouter, soon very gradually increasing to about 12 mm. in 

 length and becoming very slender distally. The second-fourth or second-fifth seg- 

 ments are more or less, usually strongly, carinate, this feature being especially marked 

 on the genital pinnules, though often but little less marked on the distal pinnules. 

 The terminal comb continues to P4. 



The disk is from 15 to 20 mm. in diameter, and is naked. The mouth is marginal, 

 and varies in position from radial to interradial. The anal area is very large, and 

 the anal tube is central. 



The color is bright yellow to deep yellowish brown, in alcohol yellowish or brown- 

 ish white, or yellowish or greenish brown. 



The preceding description is based on a series of specimens collected by the 

 Albatross. As will be seen from the following notes, this species sometimes reaches 

 a much larger size and higher degree of development. 



Notes. — Owston's specimen No. 7194 has the carination of the proximal pinnule 

 segments much more marked than usual. 



Owston's specimen No. 6929 approaches C. solaster in its characters. It has 

 20 arms. 



Owston's specimen No. 6932, to which the depth assigned is doubtfully correct, 

 approaches C. pinguis. It has 29 arms. 



The specimen from Haidashi Bank has 35 arms. All of the division series are 

 4 (3 + 4). The cirri are large and stout with 29-31 segments, and are 35 mm. in 

 length. The centrodorsal is thick discoidal, 8 mm. in basal diameter, with a broad 

 flat dorsal pole in the center of which is the usual small pit. The division series are 

 well separated. 



