33 



The cirri are XXIV, 12 — 13, 13 mm. to 15 mm. long; the first segment is short, the 

 second nearly or quite twice as broad as long, the third twice as long as the diameter of the 

 ends, the foürth-sixth three times as long as the median diameter, the following decreasing in 

 lenoth so that the antepenultimate is about one third again as long as broad ; the opposin;^ 

 spine is represented by a slight subterminal tubercle ; the terminal claw is longer than the 

 penultimate segment, rather stout, moderately curved ; the longer proximal cirrus seiuncnts 

 have slightly swollen distal ends, this character gradually disappearing as the segments become 

 shorter: the eighth or ninth segment becomes lighter in colour distally, and is a slightly marked 

 transition segment, though the preceding segments are smooth like the following; the last four 

 or five segments before the penultimate have their distal clorsal margin very slightly thickened ; 

 the 'cirri are moderately compressed laterally, this increasing slowly and uniformly from the 

 base to the short outer segments. 



The subradial clefts are very narrow and very deep. The ends of the basal rays are 

 very prominent as rounded tubercles in the angles of the calyx. 



The radials are concealed in the median line, being visible only at the side of and 

 above the ends of the basal rays; their distal angles are separated interradially by a promi- 

 nent V-shaped gap; the IBi^ are very short, slightly trapezoidal, narrower distally than basally. 

 three times as broad as long; they are very widely separated laterally, the sides of adjacent 

 IBr x making rather more than a right angle with each other; the axillaries are very broadly 

 pentagonal, almost triangular, about twice as broad as long; the lateral edges are about half 

 as long as those of the IBr^ and make slightly more than a right angle with them. 



The ten arms, which were probably about 90 mm. long, resemble those of C. decameros, 

 but are not so»rugged and show only traces of the synarthrial and articular tubercles. 



The ossicles of the division series and the lower brachials are covered with fine dermal 

 granulations. 



Pj is 15 mm. long, composed of 42 segments; the comb occupies 19 segments, arising 

 very gradually; the teeth are low, well separated, and well rounded distally, in height not 

 reaching the lateral diameter of the segments which bear them; the second-fourth or -fifth 

 segments of the pinnule have prominent and coarsely spinous ends. P 3 is 12 mm. long, similar 

 to Pj but smaller and proportionately less stout. P 3 is 7 mm. long, very slender, proportiona- 

 tely smaller and more slender than P 2 , V i is 6.5 mm. long, slightly stouter than P.„ without 

 a comb, slightly stouter than P.,, though becoming very slender distally. The distal pinnules 

 are 12 mm. long with 23 segments which have prominent articulations. 



This species differs from C. decameros in having fewer cirri which are composed of 

 fewer segments and are very slightly stouter and less compressed laterally. The synarthrial and 

 articular tubercles are not so prominent as in C. decameros, but the rugged character ot the 

 arm bases is indicated, and might become prominent in larger examples. 



S1BOGA-EXPEDITIE XI.Il/'. 



