254 
Annals of the Transvaal Museum. 
fcheir place, springing from the base of these claws. A concavity above 
the eye in both female and male is evident. In addition to the ventral 
margin of the carapace being setose for about two-thirds of its length 
the hinder margin is also setose, but the setae on this part are minute. 
In the male (fig. 3) the antennules are not ciliated ; they have indica- 
tions of segmentation and bear anteriorly at about a quarter of their length 
a single fine hair, and distally three curved bristles and a bunch of delicate 
processes, papilla tipped. The male is somewhat smaller than the female 
and naturally not so deep in proportion. 
Localities: — Transvaal: Wakkerstroom ; pond near Rifle Range, 
Pretoria ; Villieria, Pretoria ; Muckleneuk, Pretoria ; Roberts Heights, 
Pretoria. 
Bosmina longirostris 0. F. Muller, var. nov. (?) africana australis 
(PL, Fig. 2; PL, Fig. 3). Female: length as in text figure from head 
to tip of posterior horns of carapace 0‘40 mm., depth, O’ 32; male: 
length 0*33, depth, O’ 19. The length measurements would vary slightly, 
since the size of the posterior horns (fig. 3) of the carapace are not constant 
in size. These structures may be rather short and smooth or somewhat 
longer and notched along the central margin ; they always possess a slight 
upward curve. 
The female is sub-globular in form. The carapace at its dorso-posterior 
extremity forms an obtuse angle ; about six fairly long hairs are seen on 
the ventral margin towards the head region. The anterior part of the 
head is evenly rounded ; the eye is rather small. The antennules are 
fairly long. The telson bears in front of the long plumose setae a small 
spine, and towards its extremity two other small spines. The terminal 
claws are provided with two continuous series of setae, the proximal series 
stouter and longer than the distal. 
Locality : — Transvaal : Rifle Range Pond, Pretoria. 
