Ostracoda and Foraminifera of Tidal Rivers. 15 
We have great pleasure in inscribing this species to Prof. 
Alfred Newton, of Cambridge, whose assistance we have 
acknowledged in a previous page. 
_Cypridopsis obesa, B. & R., 
brown in fresh water; moreover some of those taken at 
Whittlesea, though brownish in the ground tint, had distinct 
dark bands, after the manner of C. vidua. In some localities 
both species ist ee E D is remarkable that C. 
vidua, when it occurr dredged terial, was never other- 
wise than wenn etu C. rase was often exceedingl 
abundant; on the contrary, gatherings made with the Wem 
net amongst weeds or in clear water, though often n 
C. vidua in plenty, never showed a single specimen of C. obesa ; 
so that it appears certain that the brilliantly banded vidua and 
the dingy obesa, whether we regard them as distinct species or 
merely as varieties, live often in the same situations, the one 
on the bottom mud, the other amongst the supernatant weeds. 
Genus GONIOCYPRIS, nov. gen. 
Valves compressed, subequal, thin, and fragile. Seen from the 
side, triangular, the inferior margin terminating at each ex- 
tremity in an acutely produced angle, the superior margin 
rising to an acute central point; “hinge simple. Animal ` 
unknown. 
Goniocypris mitra, nov. sp. (Pl. VII. figs. 10-13.) 
Carapace, as seen from the side, triangular; right valve rather 
larger than the left; height and length nearly e ual; ante- 
rior and posterior morgins obliquely arched (the anterior 
the more convex) and meeting in an acute point nearly over 
the cce of the shell: inferior margin straight, produced 
at cach extremity into an angular point. Seen 
rom picos ve, compressed, ovate, widest in the middle; ex- 
tremities obtusely and nearly equally pointed ; width eq 
