22 Mr. Lubbock on 



The anterior antennce are '0'65 inch in length. PI. IX fig, 7, 

 represents the five apical segments. 



T/ie posterior antennce are '02 inch in length ; the four inter- 

 mediate segments of the branch are obsolete, but their hairs still 

 remain ; the branch is rather larger than the organ itself. 



Second pair of maxilltpeds, "017 in length, elongate, 7-jointed, 

 formed like the third pair of Calanus. 



Third pair of maxilUpeds, like those of Eiichceta in shape, tlie 

 two basal segments being very large, and the remaining five very 

 short, and provided with eight large and strong hairs. Length '035. 



First pair thoracic legs. Large ramus three-jointed. The apical 

 segment has a strong spine at the apex, a row of very delicate 

 hairs on the outer margin, and four long, plumose hairs on the 

 inner side. The second segment has also a similar hair at the 

 apex, and there is a small spine at the apex of each segment. 

 The smaller or internal branch consists of one segment, bearing 

 five long plumose hairs. The plumose hair, generally situated on 

 the basal segment, was absent in the specimens I examined. The 

 sides of the segments are clothed with very delicate hairs. 

 Length '014. 



Fourth pair thoracic legs. Both branches consist of three seg- 

 ments. The hairs on the outer branch are arranged as in the first 

 pair, but altogether larger, and the apical spine is serrated on the 

 outer margin, plumose on the inner, and almost as long as the hairs. 

 The hairs on the inner branch are situated as on the outer, but are 

 finer. The margins of the segments are not fringed with hairs, 

 nor is there any basal hair. Length '027. 



The fifth pair of legs is prehensile and unsymraetrical, but not 

 much larger than the preceding, being only -0303 inch in length. 

 The right leg is the larger of the two, and consists of four seg- 

 ments, of which the two basal are short and broad, the third long 

 and cylindrical, and the apical small. The left legs seemed to me 

 to be more slender ; the second segment is long, and bears two 

 branches, the inner simple, the outer three-jointed. 



The abdomen is four-jointed. The basal segment is smaller 

 than the rest. The second segment is the largest, but not much 

 longer than the two last. The caudal stylets are small, and bear 

 four plumose hairs, of which the second is longer than, but not 

 twice as long as, the others. The first pair of natatory legs of 

 this species are very like those of the preceding. I'he fourth pair 

 of legs have the spines larger in proportion. 



Length of cephalothorax ....'055 inch. 

 ,, abdomen -020 ,, 



PI. IX. fiffs. 6 to 0. 



