A MONOGRAPH OF THE EXISTING CRINOIDS 69 



IIBr 2 series being present. There are no other notable peculiarities, except, perhaps, 

 that it is the most conspicuously yellow of all the specimens preserved. Another 

 notable specimen with the arms 75-80 mm. long has one arm that gives off a branch 

 almost at right angles in the vicinity of the eighteenth brachial; just one or two 

 brachials farther on the main arm forks and three brachials farther the left arm forks 

 again. He brought back in all 61 specimens. 



In a specimen from Mjoberg's station 4 the arms are 65 mm. long. The cirri 

 are XXXIV (of which seven are small), 24-30. In a cirrus from the apical row with 

 24 segments both the proximal and distal ridges begin on the eighteenth. In another 

 cirrus with 24 segments from the same row the proximal ridge begins on the fourth 

 and the distal on the sixteenth. In a third cirrus from the same row with 27 segments 

 the proximal ridge begins on the fourth and the distal on the sixteenth. In a cirrus 

 from the proximal row with 27 segments the proximal ridge begins on the twelfth and the 

 distal on the fifteenth. In another cirrus from the proximal row with 29 segments 

 the proximal ridge begins on the eighth and the distal on the eleventh segment. In 

 a young cirrus with 30 segments only the proximal ridge is developed, occurring from 

 the third to the twelfth segments. P! is 12.5 mm. long with 17 segments. P 2 is 12 

 mm. long with 17 segments. P 3 is 11.5 mm. long with 17 segments. P 4 is 9.5 mm. 

 long with 22 segments. P 5 has 24 segments. P 13 is 9 mm. long with 26 segments. 

 P a is 12.5 mm. long with 17 segments. P b has 16 segments, and P<j has 21 segments. 



In another specimen from Mjoberg's station 4 the arms are 65 mm. long. The 

 cirri are XXXIV (of which four are small), 17-25 + . The cirri of the apical row have 

 17-22, and of the proximal row 23-25+ segments; on the latter the proximal ridge 

 begins on the fifth and the distal on the thirteenth segment. P! is 14 mm. long with 

 16-18 segments. P 2 is 12.5 mm. long with 15+ segments. P 3 has 13+ segments. 

 P has 19+ segments. P 6 is 9 mm. long with 21 segments. P a has 15+ segments. 

 P b is 11.5 mm. long with 15 segments. P c is 10 mm. long with 15 segments. 



In a third specimen from Mjoberg's station 4 the arms are 70 mm. long. The 

 cirri are XXXV (of which two are small), 20-26. The cirri of the apical row have 

 20-22 segments, and those of the proximal row 20-26. In a cirrus of the apical row 

 with 22 segments the proximal ridge begins on the fourth, and the distal on the 

 eighth. In a cirrus of the proximal row with 25 segments the proximal ridge begins 

 on the fourth and the distal on the tenth. In another cirrus of the proximal row the 

 proximal ridge begins on the fifth and the distal on the tenth. P! is 14 mm. long with 

 18 or 19 segments. P 2 is 13 mm. long with 16 or 17 segments. P 3 has 15+ segments. 

 P 6 has 22 segments. P a is 13 mm. long with 16+ segments. P b is 12 mm. long with 

 15+ segments. Pa has 25 segments. 



In a fourth specimen from Mjoberg's station 4 the arms are about 65 mm. long. 

 The cirri are XXXII, 18-26. The cirri in the apical row have 18-23 segments, and 

 those in the proximal row 22-26. In a cirrus from the apical row with 22 segments 

 the proximal ridge begins on the fourth and the distal on the fifteenth. In a cirrus 

 from the proximal row with 22+ segments the proximal ridge begins on the fifth and 

 the distal on the tenth. P! is 12.5 mm. long with 17 segments. P 2 is 13 mm. long 

 with 18 segments. P 3 is 11 mm. long with 17 segments. P 4 is 9.5 mm. long with 15 

 segments. P a is 12.5 mm. long with 18 segments. 



In the specimen from Mjoberg's station 10 the arms are 55 mm. long. The 



