CYCLOPS. 101 



Cyclops coronatus, Clans. Uber das Genus Cyclops (Weig- 

 mann's Archiv, 1857), taf. ii, figs. 1 — 11 ; 

 and Die frei-lebenden Copepoden, p. 97, 

 taf. ii, fig. 16, and taf. x, fig. 1 (1863). 



— — Fric. Die Krustenthiere Bohniens, p. 218, 



fig. 11 (1871). 



— obesicornis, g Teinpleton. Trans. Entom. Soc. London, 



vol. i, p. 196, fig. 12 {fide Clans) (1836). 



Cephalotliorax broadly ovate. Anterior antennas 

 (fig. 4) quite as long as the cephalotliorax, attenuated 

 towards the extremity, and bearing on the last joint 

 a serrated ridge ; the two preceding joints also bear 

 longitudinal crests of a similar character, but not 

 toothed; these are interruptedly continuous with a 

 somewhat similar line, which courses down the 

 limb across most of the joints to near its base ; the 

 eighth, ninth, tenth, twelfth, thirteenth, and fourteenth 

 joints have the distal border edged with rows of fine 

 teeth. Posterior antennas (fig. 6) long and slender; 

 second joint fringed on its lower margin with a 

 comb-like series of short spine-like hairs ; third and 

 fourth joints much more slender. Fifth foot (fig. 11) 

 2-jointed ; basal joint large and broad, finely ciliated 

 on the inner margin, and bearing at the outer distal 

 angle a long seta; second joint much smaller, pro- 

 duced at the apex into a small median process, which 

 gives attachment to a long slender seta ; two stouter 

 and shorter setas are attached to the lateral angles. 

 The first segment of the abdomen is as long as the 

 two following, the fifth is the shortest; caudal seg- 

 ments broad and short, not equal in length to the two 

 preceding segments. Outer tail-seta very short; the 

 next equal in length to the whole abdomen, including 



