10 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



Another specimen from station 56 has the cirri XXVII, 3756, 1424 mm. long. 

 The dorsal surface of the centrodorsal is 1.5 mm. in diameter. The 20 arms are 50 

 mm. long. The processes on the brachials are shorter than in the specimen preceding. 

 A single dorsal spine is developed from the tenth brachial onward. The arms are 

 distinctly flattened laterally out to the fifth brachial. The distal intersyzygial inter- 

 val is 13-16 muscular articulations. P t is 5.5-7.5 mm. long with 13-15 segments. 

 P 2 is 4.5-5 mm. long with 9-11 segments. P 3 is 4-5 mm. long with 8-9 segments. 

 The distal pinnules are 5 mm. long with 11 segments. 



Another specimen from station 56 has the cirri XXI, 43-57, from 18 to about 

 22 mm. long; the first six cirrus segments have a real ventral spine; dorsal spines are 

 developed from about the tenth to twentieth segments. The 15 arms are 45 mm. 

 long. The median keel on the IBr axillary is somewhat lower than in the type specimen. 

 The brachials beyond the sixth are without lateral prominences. There are about 90 

 brachials, of which about five of the terminal have rudimentary pinnules. The dorsal 

 brachial spine is low. On the four arms on one postradial series the syzygies are as fol- 

 lows: (1) brachials 3 + 4, 35+36, and 56 + 57; (2) 3 + 4, 33 + 34, 44+45, and 53 + 54; 

 (3) 3+4, 29+30; (4) 3+4, 30+31, and 43+44. The distal intersyzygial interval 

 is 5-18 muscular articulations. P t is 4 mm. long with 12 segments of which the last 8 

 are collar-shaped with their distal edges overlapping; a similar condition, though not 

 so marked, occurs on P 2 , P 3 , and P 4 . P 2 is 3.5 mm. long with 9 segments. P 3 is 3 

 mm. long with 9 segments. P 4 is 3 mm. long with 8 segments. The distal pinnules 

 are 5.5 mm. long with 12 segments. 



Another specimen from station 56 has the cirri XVIII, 54-65, 25-30 mm. long. 

 The 15 arms are 60-65 mm. long. A regenerate from a IIBri has two small, still smooth, 

 arms. PI is 4-6 mm. long with 8-13 segments. P 2 is 4 mm. long with 8 segments, 

 P 8 is 3 mm. long with 7 segments. The distal pinnules are 5.5 mm. long with 9-10 

 segments. 



A specimen from station 59 has the cirri XVIII, 62-65, 24-28 mm. long. The 16 

 arms are broken. The IIBr series are 2. Pj is 5 mm. long with 13 segments. The 

 disk is 6 mm. in diameter. 



In another specimen from station 59 the cirri are XVII, 53-60, 23-28 mm. long. 

 The arms are 15+, broken. The IIBr series are 2. PI is 6 mm. long with 13 segments. 

 The disk is 7 mm. in diameter. 



Another specimen from station 59 has the cirri XIV, 40-43, 15-18 mm. long, in one 

 and a partial second row, hardly divided into groups. The dorsal surface of the 

 centrodorsal is 1 mm. in diameter. The 12 arms are 40 mm. long. The calcareous 

 lamellae on the proximal ossicles are only slightly serrate. A single dorsal spine is 

 developed from the eighth brachial. On a postradial series with one IIBr 2 series 

 the syzygies in the three arms are arranged as follows: (1) in the arm arising from the 

 IBr axillary, between brachials 3+4, 16+17, 23 + 24, and distally at intervals of 5 

 muscular articulations; (2) in the inner arm from the IIBr axillary, between brachials 

 3+4, 21 + 22, and distally at intervals of 7-8 muscular articulations; (3) in the outer 

 arm from the IIBr axillary, between brachials 3+4, 21 + 22, and distally at intervals 

 of 8 muscular articulations. For the animal as a whole the distal intersyzygial interval 

 is 5-8 muscular articulations. P t is 4-4.3 mm. long with 10 segments. P 3 is 3.5 mm. 

 long with 9 segments. P 3 is 2.5 mm. long with 7 segments. 



