144 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



In the specimen from Mortensen's station 19, according to Gisl6n, the centro- 

 dorsal is a low hemisphere. The cirri are XVI, 12-15, from 3.7 to 5.7 mm. long. The 

 longest cirrus segments are as long as the distal width. The cirri are arranged in a 

 double row on the centrodorsal. The 14 arms are 35 mm. long. The IB^ are one- 

 third again as broad as long. The IBr 2 (axillaries) are as long as broad. P! is 2.5 

 mm. long with 10 segments. P 2 is 3.5 mm. long with 10 segments. P 3 is 1.9 mm. 

 long with 8 segments. P 4 is 2 mm. long with 8 segments. P a is lacking. Dr. Gisle'n 

 says that this is a young specimen. It can be distinguished from specimens of C. 

 pulchella by the less numerous cirri, and by the slender arms composed of long and 

 very juvenile segments. The elements of the IBr series are also extremely long, 

 and PI and Pj have an equal number of segments. 



The specimen from Ito has 20 arms. 



The 20 specimens from between Ito and Hatsushima are mostly small or of 

 medium size, the arms of the largest being 75 or 80 mm. long. Three of them have 

 13 arms, one has 14 arms, one has 15 arms, three have 17 arms, three have 18 arms, 

 four have 20 arms, four have 21 arms, and one has 25 arms. In the specimen with 

 25 arms there are five IIIBr series, all developed externally. In one of the specimens 

 with 21 arms and in one of those with 18 arms there are two IIIBr series. Single 

 external IIIBr series occur in two of the specimens with 21 arms, and in one each of 

 those with 18 and 17 arms. 



Of the 8 specimens from Fukuura one has 12 arms, one has 13 arms, one has 15 

 arms, one has 16 arms, two have 17 arms, one has 18 arms, and one has 26 arms. 



One of the 3 specimens from lagoshima has 20 arms 65 mm. long. Another has 

 20 arms 70 mm. long, all the IIBr series being present; the cirri are 16 mm. long and 

 are composed of 31 segments. The third has 21 arms 75 mm. long, there being present 

 one external IIIBr series; the cirri are 16 mm. long with 30 segments. 



The specimen from off Sunosaki has 16 arms. 



In the specimen from Bock's station 35, as described by Gislen, the centrodorsal 

 is discoidal with the bare dorsal pole 2 mm. in diameter. The cirri are XV, 25-27, 

 from 13 to 15 mm. long, and are arranged in an almost single row on the centrodorsal. 

 The third and fourth segments are about as long as broad, the fifth-seventh are 

 slightly longer than broad, and those following are shorter again, the distal being 

 half again as broad as long. The fifth- (or seventh-) twelfth segments have a small 

 dorsal transverse ridge with an excavation in the middle forming an indistinct double 

 tubercle, and from about the thirteenth onward the segments have a simple dorsal 

 spine which reaches in height one-quarter the width of the segment that bears it. 

 The height of the opposing spine is equal to half the width of the penultimate segment. 

 The terminal claw is about as long as the penultimate segment. The distal edges 

 of the radials are visible beyond the rim of the centrodorsal. The IBr! are five tunes 

 as broad as long, and are free laterally. The IBr 2 (axillaries) are three times as broad 

 as long. The ossicles immediately following the axillaries are interiorly united. The 

 IIBr series are 2. Inconspicuous synarthrial tubercles are present. The 16 arms 

 are 90 mm. long, and are slender, smooth, and well separated basally. The width 

 of the first brachials is 1.1 to 1.2 mm. The first seven brachials are discoidal, and 

 those succeeding are wedge-shaped. The longer side of the distal brachials equals 

 the width. There are 19 or 20 brachials for each 10 mm. of arm length, or 15 if the 



