"^'iSi!^,i:t" ^MMm in the Uni.

200
CRUSTACEA.
author puts it forward as a striking example of morphological progress without
adaptative modification, and therefore destined to disappear!
POLYPHEMID^E.
Evadne nordmanni, Loveh, var. jaltensis, n., Czerniavski, Mat. zoogr. Pont.
p. 57.
Podon, Lilljeborg, the generic character emended with regard to the presence
of outer appendages in the last three pairs of feet, and P. meznikovii,
sp. n., described by Czerniavski, I. c. pp. 58-60, pi 8. fig. 47-51.
Pleopis schcedlerii, sp. n., Czerniavski, I. c. p. 60.
OSTRACODA.
CYPRIDID^E.
Cypris ventricosa, tumefacta, fretensis, sp. n., Brady, Ann. N. H. (4) vi.
pp. 12-13, pi. 4. figs. 1-3, 4-6, and 7-9, tidal rivers and lakes in Northumberland,
the last also in the Meuse and Scheldt.
Cypridopsis? newtoni, sp. n., Brady, /. c. p. 14, pi. 7. figs. 14-16, tidal
rivers and lakes in Northumberland.— C. obesa, Brady, is probably a variety
of vidua, Miill. ibid. p. 15.
Goniocypris, gen. nov. Valves compressed, subequal, thin and fragile.
Seen from the side triangular, the inferior margin terminating at each extremity
in an acutely produced angle, the superior margin rising to an acute
central point; hinge simple. Animal unknown.— 67. mitra, sp. n., Brady,
/. c. p. 15, pi 7, figs. 10-13, tidal rivers and lakes of Northumberland.
Argillcecia ? auvea, sp. n., Brady, I. c. p. 16, pi 8. figs. 4, 5, river Ouse at
Lynn.—A. mevidionalis, sp. n., Brady in Berchon and Folin, Fonds de la Mer,
p. 198, pi. 27. figs. 9, 10, Magellan Straits.
Candona Candida (Miill.), var. tuniida, new var., C. kiugslcyi, diuphana, and
hyalina, spp. nn., Brady, I. c. pp. 10-19, pi 9. figs. 13-15, 9-12, 5-8, pi. 5.
figs. 1-3 and 4-11, tidal rivers and lakes of Northumberland.
Bairdia fasciata, sp. n., Cape-Verde Islands; uugulata and dcwattrei, spp.
nn., MageDan Straits. Brady in Berchon and Folin, Fonds de la Mer, p. 193,
pi 19. figs. 20, 21; p. 199, p! 27. figs. 11,12 and 17,18.
Metacypris, gen." nov. Shell moderately strong and thick, excessively
tumid; ventral surface deeply impressed along the central and posterior portions
of the median line. Hinge formed on the right valve by a laminated
angular projection anteriorly, posteriorly by a strong rectangularly produced
flange, from which projects a single sharply cut tooth; on the left by a deep
sulcus behind and a shallower one in front.—M. cordata, sp. n., Brady, /. c.
p. 19, pi 6, tidal rivers and lakes in Northumberland, also in the Meuse
and Scheldt. Animal not known; therefore it remains doubtful whether it
is to be placed among the Cyprida? or the Cytheridae.
CYTHERID.E.
Cythere. Four species inhabiting the Black Sea mentioned; one of them,
C. nigrescens, Baird, figured by Czerniavski, Mat. zoogr. Pont. p. 62, pi. 4.
fig. 11.
Cythere fidicula, sp. n., Brady, I. c. p. 21, estuaries of the rivers Thames,