178 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



Syzygies occur between brachials 3+4, 9+10, and 13 + 14, and distally at 

 intervals of 3 muscular articulations. 



P c is 2.5 mm. long, with 10 segments. P t is 3 mm. long, with 10 segments. 

 P a is 4 mm. long, with 10 segments. P 2 is 4 mm. long, with 12 segments. The 

 second segment of P a and P 2 is not quite so long as broad, the third segment is one- 

 third to one-half again as long as broad, and the distal segments are three times as 

 long as broad, somewhat expanded at the distal end but only slightly spiny. P b is 

 3.5 mm. long, with 11 segments. P 3 is 3.5 mm. long, with 12 segments. The distal 

 pinnules are 5.5 mm. long with 15 or 16 segments, which are three to four times as 

 long as broad, and of which the outermost bear dorsal hooks. There are three pairs 

 of large sacculi on each segment. 



The disk has been lost; it was about 2 mm. in diameter. 



The proximal muscular articulations are dark colored. From about the seventh 

 the brachials are wedge-shaped, each with a pair of dark longitudinal bands. 



Notes. The specimen described was from station 46. Another specimen from 

 the same station showed the following characters: The cirri are XVII, 10-14, from 

 4.5 to 6.5 mm. long. The arms are 30 mm. long. P c is 2 mm. long, with 8 segments. 

 P, is 2 mm. long, with 8 segments. P a is 3.5 mm. long, with 10 segments. P 2 is 3.2 

 mm. long, with 10 segments. P b has 12 segments. The distal pinnules are 5 mm, 

 long, with 14 segments. The third segments of P t and P a are one-third again as 

 long as broad. The disk is 1.5 mm. in diameter, and the anal tube is 0.8 mm. high. 



In a specimen from Bock's station 47 the cirri are XVI, 13-16, from 6.5 to 8 

 mm. long. The fifth segment is twice as long as broad and is centrally constricted. 

 The arms are 40 mm. long. P c is 2.5 mm. long, with 8 segments. P! has 8 segments. 

 The third segments of P! and P B are one-third again as long as broad. P 2 is 5 mm. 

 long with 13 segments. P is 4.5 mm. long, with 12 or 13 segments. The distal 

 pinnules are 7 mm. long, with 18 segments, which are three to three and one-half 

 times as long as broad. The disk is 2 mm. in diameter. 



In another specimen from station 47 the cirri are XVI, 12-15, from 5 to 6 mm. 

 long. The cirrus segments are a little shorter than in the preceding specimen, one-half 

 to three-quarters again as long as broad. The arms are 35 mm. long. P c is 2 mm. 

 long, with 7 segments. P t has 8 segments. P a is 4.2 mm. long, with 13 segments, 

 of which the third is half again as long as broad. P 2 has 12 segments. P b is 4 mm. 

 long, with 12 segments. The disk is 1.8 mm. in diameter. 



In a specimen from station 48 the cirri are XIV, 14-16, from 6 to 7 mm. long. 

 The arms are 30 mm. long. P c is 2 mm. long, with 8 segments. P, is 2.2 mm. long, 

 with 9 segments. P a is 3.7 mm, long, with 13 segments, of which the third is one- 

 fourth again as long as broad. P b is 3.5 mm. long, with 11 segments. The distal 

 pinnules are 4.5 mm. long, with 14 segments, which are twice as long as broad. 



In a small specimen from station 53 the cirri are XV, 8-12, from 2 to 4 mm. 

 long. The arms are 10+ mm. long. There are strong prominences on the proximal 

 ossicles as in the smallest specimen from station 45. PC is 1.2 mm. long, with 6 

 segments. PI is 1.2 mm. long, with 7 segments. P a has 7 segments, of which the 

 third is one-half to three-quarters again as long as broad. 



In a specimen from station 45 the cirri are XV, 14-15, from 5 to 6.5 mm. long. 

 The arms are 40 mm. long. P c is 2.2 mm. long, with 8 segments. P! is 2.7 mm. long, 



