108 BRITISH COPEPODA. 



I have had no opportunity of comparing my speci- 

 mens with Koch's figures ; but they seem to agree in 

 almost all points with Sars' description, the only 

 important difference which I can discover referring to 

 the fifth foot ; Sars says, " articulus basalis minimus," 

 whereas in my specimens the joints are about equal in 

 size, and neither of them very small. 



(b. Anterior antennce 14*-jointed.) 



6. Cyclops insignis, Clans. PI. XXI, figs. 1 — 9. 



Cyclops insignis, Claus. Das Genus Cyclops (Weigmann's 

 Archiv, Band xxiii), p. 209, t. xi, figs. 8 — 12; 

 Die frei-lebenden Oopepoden, p. 101 (1857). 



— — Sirs. Oversigt Ferskvandscopepoder, p. 38 



(1863). 



— — Frio. Die Krustenthiere Bohmens, p. 222, 



fig. 17 (1871). 



— Lubboclcii, Brady. Nat. Hist. Trans. Northumberland 



and Durham, vol. iii, p. 127, pi. iv, figs. 

 1—8(1868). 



Anterior antennas (fig. 1) rather shorter than the 

 first body-segment, 14-jointed, the eighth joint being 

 incompletely divided; first and eighth joints larger 

 than the rest; last two joints moderately long and 

 slender. Posterior antennas moderately robust. Man- 

 dibles (fig. 7) dilated at the apex; teeth broad and 

 strong. Anterior foot-jaws moderately robust and bear- 

 ing several plumose setae ; posterior foot-jaws strong, 

 with a powerful terminal claw. Fifth foot (fig. 6) 

 2 -jointed, first joint short and bearing a single seta ; 



