150 



Mil. 1. C. THOMPSOT^ ON THE COPEPODA OF 



similar experience to Brady's. His specimens of this species 

 (' Cliallenger ' Eeport on the Copepoda, p. 77) were sparingly 

 found in three remarkably distinct areas. 



Temora dubia, Luhhock. 



Very abundant in all the gatherings. 



IsiAS CLAYIPES, Boeck. 



First abdominal segment of female has two remarkable trifid 

 spines on ventral side, not described by Boeck or Brady. I first 

 noticed this point in specimens taken in Liverpool Bay. The 

 fifth feet of male also diff'er considerably from Brady's drawing. 



CeNTBOPAGES BRACHIATrS. 

 C. TYPICTIS. 

 C. VIOLACEUS. 



Our specimens of the latter are most profusely and elegantly 

 adorned with violet plumose setae. 



Mectnoceea, n. gen. 

 Cephalothorax 6-jointed ; head united with thorax ; abdomen 

 4-jointed in the male, 3-jointed in the female. Anterior antennje 

 23-jointed, very long. .* Outer branch of posterior antennae 3- 

 jointed, the inner branch 7-jointed. Mandibles and maxillae 

 well developed. Anterior foot-jaw 3-jointed and very muscular, 

 and, like the posterior, clothed with strong plumed setae. Swim- 

 ming-feet alike in both sexes, fifth feet entirely wanting. 



Mecynocera Clatjst, n. sp. (PI. XI. figs. 1-4.) 



Length inch. Eostrum bifid and very slender. Anterior 

 antennae 23-jointed, alike in both sexes, about twice the length 

 of the entire animal (fig. 1) ; the lltli, 12th, and 13th joints of 

 left antennae only edged with fine saw-teeth (fig. 2). Basal 

 portion of both antennae bear several short setae and a few long 

 ones, and at intervals, and especially at apex, are several long 

 whip-like setae. Posterior antennae very muscular; the outer 

 branch 3-jointed, the inner 7-jointed and terminated by spread- 

 ing setae. Mandibles finely toothed. Maxillae well developed, 

 with, two spreading setiferous branches and broad rounded palp. 

 Anterior foot-jaw 3-jointed, and, like the posterior, which is 

 small, bearing a large number of j)lumose setae. 



Swimming-feet (fig. 3) have small hooked spines at ends of 

 joints, but no terminal spines besides the strong spinous setae. 



