146 BRITISH COPEPODA. 



(fig. 4) armed with six stout spine-like setae, two of 

 which are much longer than the rest. Lobes of the 

 maxillae (fig. 6) broad, and armed at the apices with 

 several stout setae ; first pair of foot-jaws (fig. 7) very 

 broad, shortly aculeate at the apex; second pair 

 (fig. 8) much smaller and more slender, 1 -jointed, 

 bearing four slender terminal setae. Outer branches 

 of the swimming feet bearing on the basal joint one 

 short apical spine, and on the second joint four or five 

 somewhat longer spine-like setae. The basal joint of 

 the inner branch in the first pair (fig. 9) is destitute 

 of setae, but the second joint bears four short spines, 

 and one excessively long seta ; the basal joint in the 

 second, third, and fourth pairs has a single apical 

 seta of moderate length, while the second joint bears 

 three very long setae. The penultimate segment of the 

 abdomen bears at the posterior angles a brush of 

 minute hairs. Length 1-5 th of an inch (5 mm.). 



This species occurred not uncommonly in specimens 

 of Ascidia mentula dredged by the Rev. A. M. Norman 

 at Oban and in Birtirbuy Bay, and in Ascidia sordida 

 at Shetland ; my own collection contains several 

 specimens taken from Ascidians which were dredged 

 off the Durham Coast. 



Family 5. Bupeorid^:, Thorell. 



Body not distinctly segmented, anterior antennae 

 small and rudimentary, two- or three- jointed, poste- 

 rior one- or two-jointed. Mandibles destitute of palps. 



