116 BRITISH COPEPODA. 



sparingly in the undermentioned localities off the coasts 

 of Durham and Yorkshire. In forty-five fathoms 

 twenty miles off Sunderland, amongst muddy sand, 

 and in thirty to thirty-five fathoms off Robin Hood's 

 Bay, Staiths, and Red Cliff. 



Allied to D. longirostris t Claus, and D. minutus, 

 Glaus, as well as to D. Stromii, Baird, but differing 

 from these, especially in the structure of the antennas, 

 the first and fifth pairs of feet, and the tail setae. 



5. DACTYLOPCTS FLAVUS, Claus. Plate L VI, figs. 1 11. 



Dactylopus flavus, Claus. Die Copepoden-Fauna von Nizza, p. 28, 

 taf. iii, figs. 1316 (1866). 



Body depressed, robust; abdomen short and broad; 

 the second, third, and fourth segments and in the 

 male the first segment also pectinate on the posterior 

 margins ; rostrum rounded off. Anterior antennae 6- 

 jointed, much shorter than first body segment, joints 

 subequal (fig. 2) ; in the male (fig. 3) the fourth joint 

 forms a vesiculiform swelling. Inner branch of poste- 

 rior antenna 2-jointed. The hand of the second foot-jaw 

 (fig. 4) is long and slender, ciliated on the inner margin 

 and provided with one large seta, one also at the 

 apex of the preceding joint. The outer branch of the 

 first swimming-foot has the middle joint scarcely at 

 all larger than the other two (fig. 5), the entire length 

 of the branch being less than that of the first joint of 

 the inner branch; the apical spines of the first and 



