tunity of examining the type specimens of C. virescens , and it is on 
this that the foregoing remarks are based. 
Cyclops longistylis ?, G. S. Brady. Plate XIX, figs. 17-23. 
Cyclops longistylis , Brady. Notes on Dr. Graham’s collection of 
Cyclopidae. (Annals of Tropical Medicine and Parasitology, Vol. 1, 
No. 3, 1907.) 
Female, length 077 mm. Body slender, tapering gradually from 
before backwards (fig. 17), first segment longer than broad, 
sub-ovoid, the three following segments scarcely at all produced 
laterally, last thoracic segment very small; urosome slender, genital 
segment not at all tumid, caudal rami very slender, about six times 
as long as broad, scarcely divergent; anterior antennae ten-jointed, 
when reflexed somewhat shorter than the first body segment 
(fig. 22). All the natatory feet have both branches three- jointed, 
feet of the fifth pair very minute, almost obsolete, bi-articulate 
(fig- 2 3)> the first joint bearing two setae, the distal joint one seta; 
attached to this pedigerous segment just in front of the foot are 
three rather strong setae—longer than the foot itself. The spines 
of the second and third pairs of feet are in the male unusually 
strong (fig. 19), those of the fourth pair not quite so strong, and 
those of the first pair almost normal (fig. 20). 
The specimens here described were found in Dr. Dalziels 
gatherings from the Benue River (Source E), ‘ colour dark green or 
greenish-yellow, the egg masses brown, carried close to the body. 
The reference of these to C. longistylis is somewhat doubtful, and 
the type-specimens being now in the British Museum — very few in 
number, and in an imperfect condition — I am unable to verify the 
reference. 1 he principal doubt arises from a discrepancy in the 
recognisable number of joints in the anterior antennae, Dr. Grahams 
1 ecord of twelve joints disagreeing with my own observation of ten 
joints only in Dr. Dalziels specimens. But these details are not easily 
observed in spirit-specimens, and need not be absolutely insisted on 
Cyclops leuckarti, Claus. Sources A. B. C. D. E. 
Cyclops bicolor, G. O. Sars. Sources A. C. 
Cyclops brevipes, n. sp. Plate XX, figs. 31-34. 
F emale, length 075 mm. Body slender (fig. 31). the first seg¬ 
ment occupying not much less than half of its entire length, rounded 
