CONILERA. 251 



quickly. In Ireland it has been found at Larne and at 

 Carrickfergus (Thompson) . 



Gen. 130. JEGA, Leach. Fish-Louse. 



Eyes large, granular, oblong, oblique, marginal. Upper 

 antennae with a very large basal joint, which, with the 

 second, is wide and compressed. Body seven-jointed. Tail 

 six-jointed, last joint the largest, the base on each side fur- 

 nished with two leaf-like appendages. 



_/£ga bicarinata, Leach. (Plate XIY. fig. 5.) — Last 

 joint of abdomen with two oblique keels; its extremity trun- 

 cated and notched. 



British coast, rare. 



^Ega tridens, Leach. — The last joint of the tail with 

 three keels, which are produced beyond the tip into teeth, 

 the inner process truncated. 



Scotland (Dr. Leach) ; Ireland, Belfast (Col. Portlock). 



Gen. 131. CONILERA. 

 Eirst two joints of upper antennae nearly cylindrical. Eyes 

 small, separate, not at all prominent. Sides of the seg- 

 ments of abdomen nearly straight. 



