produced internally into a short digitiform process or rudimentary 
inner branch; the outer ramus short, bi-articulate, the last joint 
bearing a small setiferous papilla. The protopodite bears on its 
distal margin a couple of papilliform processes which overlap 
slightly the basal joint of the limb. The tail setae of the male are 
much more slender than those of the opposite sex, and are 
non-plumose. 
This species seems to be more nearly allied to D. galcboides, G. 0 . 
Sars, than to any other described species, though whether that form 
be really specifically distinct from D. galebi of Mrazek may perhaps 
be doubted. The types of D. galebi were taken in Egypt, those oi 
D. galeboides in Lake Tanganyika. 
Dr. Dalziel’s specimens, here described, are from ‘ a rocky pool 
of a hill-stream, 7. II. 09/ 
OSTRACODA 
Cypris subovata , n. sp. Plate XX, figs. 35-39- 
Shell subovate, tumid; seen from the side subreniform, highest 
in the middle, height more than equal to half the length, extremities 
well rounded, the anterior being the narrower of the two, dorsal margin 
gently arched, ventral slightly sinuated in the middle (fig. 35 ) i seen 
dorsally the outline is ovate, tumid, greatest width behind the middle 
and equal to considerably more than half the length (fig- 3 ^)> 
extremities obtusely pointed, the left valve larger than the right 
and distinctly overlapping in front; shell surface smooth, clothed 
at the extremities with fine hairs. Length 077 mm. Setae of the 
posterior antennae reaching beyond the apices of the terminal claws. 
Caudal rami slender (fig. 37), their terminal claws simple, only 
slightly curved, the marginal seta short, attached near the distal 
end of the limb about one-fourth of its length from the apex. 
Sources A. D. 
Cypridopsis circinata , n. sp. Plate XX, figs. 40, 41. 
Shell very tumid, sub-spherical; seen from the side sub-ovate, 
gibbous, greatest height situated in the middle, and equal to about 
three-fourths of the length, extremities very broadly rounded, dorsal 
margin boldly arched, gibbous in the middle, ventral slightly convex 
