241 
stout, with both rami bi-articulate (fig. 6); last pair of feet 
two-jointed (fig. 2), the basal joint short and not very distinct, apical 
joint slender, bearing two long setae, the distal one being needle- 
shaped. Colour stated by Dr. Dalziel to be ‘ greyish green, eye, deep 
red.’ The general characters of this species are very similar to those 
of C. gracilis , Lilljiborg, and C. bicolor , G. O. Sars, and the 
natatory feet are not unlike those of C. pachycomus, one of the many 
spedes described by the latter author from Lake T anganyika. 
Dr. Dalziel’s specimens are from several difterent sources. The 
species would seem to be generally distributed in the region investi¬ 
gated by him. Sources A. B. C. D. E. 
Cyclops virescens, G. S. Brady. Plate XVIII, figs. 8-16. 
Female, length 0^65 mm. Body slender, the anterior segment 
ovoid in form, and scarcely at all produced in front (fig. 8), thu 
other thoracic segments not expanded laterally, last segment short 
(fig. 10); urosome slender, genital segment equal in length to the 
two following segments, scarcely at all dilated (fig. 10), caudal 
rami short, about equal in length to the last tail segment, not at all 
divergent. Anterior antennae (fig. 9 )> eleven-jointed, reaching when 
reflexed to the posterior border of the third body segment, slender 
and sparingly setiferous; natatory feet (figs, u, 15. l6 )> Wlth both 
branches three-jointed; fifth pair of feet uni-articulate and bearing 
two apical setae (fig. 14). First segment of the urosome m the 
male produced ventrally into a slender spine (fig- 1 3 )- 
This, like the preceding species, occurred in various gatherings, 
and Dr. Dalziel’s notes assign to it a wide range of colour, from yellow 
to green and brown. Sources A. B. C. D. E. 
There can, I think, be little doubt as to identifying Dr. Dalziel’s 
specimens with those already imperfectly described by me from Di. 
Graham’s collection under the specific name of virescens. Dr. 
Graham’s notes, made from an examination of freshly gathered speci¬ 
mens, assign ten joints to the anterior antennae, whereas the numbei 
of joints in Dr. Dalziel's specimens is, so far as I can make out, eleven. 
But the jointing, as seen in spirit-specimens, is very indistinct, and m 
any case the slight difference might possibly depend upon the age o 
the animals. In all other respects the two forms agree with each other. 
I am indebted to Dr. Caiman, of the British Museum, for the oppor- 
