150 MU. I. C. THOMPSON ON THE COPEPODA OF 
similar experience to Brady’s. His specimens of this species 
( £ Challenger ’ Beport on the Copepoda, p. 77) were sparingly 
found in three remarkably distinct areas. 
Temora dubia, LubbocJc. 
Yery abundant in all the gatherings. 
IsiAS CLAYIPES, Boeck. 
Hirst 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 differ considerably from Brady’s drawing. 
Centropages brachiatus. 
C. TYPICUS. 
C. VIOLACEUS. 
Our specimens of the latter are most profusely and elegantly 
adorned with violet plumose setae. 
Mecynocera, n. gen. 
Cephalothorax 6-jointed ; head united with thorax : abdomen 
4-jointed in the male, 3-jointed in the female. Anterior antennae 
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 Clattst, n. sp. (PI. XI. figs. 1-4.) 
Length inch. Bostrum bifid and very slender. Anterior 
antennae 23-jointed, alike in both sexes, about twice the length 
of the entire animal (fig. 1) ; the 11th, 12th, and 13th joints of 
left antennae only edged with fine saw-teeth (fig. 2). Basal 
portion of both antennae bear several short setae aud 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 tw r o spreading setiferous branches and broad rounded palp. 
Anterior foot-jaw 3-jointed, and, like the posterior, which is 
small, bearing a large number of plumose setae. 
Swimming-feet (fig. 3) have small hooked spines at ends of 
joints, but no terminal spines besides the strong spinous setae. 
