LAOPHONTE. 77 



external branch very slender, less than half the length 

 of first joint of outer branch; outer branch long and 

 moderately stout, with a long curved claw. Second, 

 third, and fourth pairs very slender, elongated (fig. 6), 

 outer branch twice as long as the inner, the last joint 

 as long as the preceding two. Fifth pair of feet 

 (fig. 7) long and narrow ; lateral segments of the basal 

 joint not much developed; inner segment 4-, outer 1- 

 setose , second joint attenuated, with ciliated margins ; 

 the apex bearing two, and the outer margin three, long 

 setae. Length ^ 8 th of an inch ('52 mm.). 



Apparently a rare species. Two or three specimens 

 only were seen in dredged material from a depth of 

 thirty fathoms, off Staiths and Robin Hood's Bay, 

 Yorkshire coast : one or two specimens, perhaps refer- 

 able to L. thoracica, occur in a series of Copepoda 

 taken by Mr. Norman at Oban, in a depth of twelve to 

 sixteen fathoms. The characters of the antenna, 

 second foot-jaws, and fifth pair of feet amply distin- 

 guish it from any other species. I am indebted to 

 the kindness of the late M. Boeck for drawings of L. 

 thoracica, and can scarcely entertain any doubt that 

 they refer to the species here described, though the 

 swimming-feet of the Norwegian species do not appear 

 in M. Boeck's figures to be quite so slender, nor the 

 fifth pair of feet so profusely setose ; this last con- 

 dition, however, may very easily have arisen from 

 accidental mutilation. Females only have occurred 

 amongst my specimens. 



