BATHYMETRINAE 



171 



the Other from the third syzygy, and are about 13 mm. in length. Most of the arms 

 complete to the second syzygy are broken but not detached at the first. It is a fragile 

 species. 



The centrodorsal is low and rounded. The dorsal pole is rather large, rounded and 

 a little rough. The cirrus sockets are closely set, indistinctly arranged in columns. 



Fig. II. Phrixometra mitrix. a, cirrus, x 27. b, proximal part of a ray, X33. c, third to thirteenth 

 brachials seen obliquely from the side, x 20. </, Pj, x 20. e, ambulacral skeleton of distal pinnule, x 55. 



Cirri ca. XLVII, 12-18. The first two segments are very short, the first shorter than 

 the second; the remainder are longer than broad, the distal only slightly so (Fig. 11 a). 

 The third to the sixth or eighth are the longest; they are slightly constricted in the 

 middle, more strongly on the dorsal than the ventral side. The segments beyond are 

 wider at the distal than the proximal ends but no dorsal spines are developed. The distal 

 segments are noticeably wider than the middle segments. The terminal claw is strong 



