IN NORTHUMBERLAND AND DURHAM. 147 
2. Cypris acuneata, Liljeborg. (Pl. III. figs. 7-10.) 
Cypris aculeata, Liljeborg, om de inom Skane forkom. 
Crust. af Ord. Cladocera, Ostracoda och Copepoda, 
p- 117. tab. XI. figs. 15-16. 
Forma brevis et alta, reniformis ; margo dorsalis valde 
arcuatus ad apicem rotundatum fere in medio situm 
assurgens ; margo ventralis leviter smuatus. Forma 
desuper spectata elongato-ovata, antice angustior, 
acuminata. Latitudo maxima altitudine multo 
minor, pone medium sita. Basis convexa. Val- 
varum superficies aculeis arcuatis pilisque inter- 
mixtis admodum hispida, cellulis numerosissimis 
excavata. Color cxruleo-viridis. Long. 2; unc. 
Habitat regionem Dunelmensem prope Sunderland et 
Stockton. 
Carapace reniform, very high in proportion to its length, 
covered all over with very numerous cells, and clothed with a 
hispid covering of intermixed hairs and arched spines. The 
spines are most evident near the dorsal margin, but there are 
none fringing the anterior and posterior margins (the only posi- 
tion which spines occupy in the last described species.) The 
_ dorsal margin is greatly arched, rising to a rounded summit, 
which is situated nearly in the centre of a valve ; ventral margin 
slightly incurved centrally. 
The form of the carapace, viewed from above, is elongated 
ovate, slightly narrower in front than behind, and in no part more 
than slightly convex, so that the height greatly exceeds the 
diameter. The inferior antenne have four long and two short 
slightly plumose filaments. The base is convex. 
Colour dark blue-green. Length 4% inch. 
Cypris aculeata, now first added to the British Fauna, has 
been well described and figured by Liljeborg. I received the 
species in the early part of the summer, from Mr. G. 8. Brady, 
the friend to whom I am moreover indebted for his most kind 
assistance in illustrating this paper. 
Mr. Brady found it ina pond connected with the pumping 
engine of the Monkwearmouth Colliery, near Sunderland. The 
