200 
CRUSTACEA. 
author puts it forward as a striking example of morphological progress with- 
out adaptative modification, and therefore destined to disappear ! 
PoLYPIIEMIDiE. 
Evadne nordmanni, Lov6n, y&x. jaltensis, n., Czerniavski, Mat. zoogr. Pont, 
p. 67. 
Podon, Lilljeborg, the generic character emended with regard to the pre- 
sence of outer appendages in the last three pairs of feet, and P. meznikovii, 
sp. n., described by Czerniavski, 1. c. pp. 58-60, pi. 8. fig. 47-61. 
Pleopis schoedlerii, sp. ii., Czerniavski, 1. c. p. 60. 
OSTRACODA. 
CvPRIDIDiE. 
Cypris ventricosay 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 Northum- 
berland, the last also in the Meuse and Scheldt. 
Cypridopsis? neivtom, sp. n., Brady, /. c. p. 14, pi. 7. figs, 14-16, tidal 
rivers and lakes in Northumberland. — (7. ohesa, 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 ex- 
tremity in an acutely produced angle, the superior margin rising to aji acute 
central point; hinge simple. Animal unknown. — G. mitra, sp. n., Brady, 
1. c. p. 15, pi. 7, figs. 10-13, tidal rivers and lakes of Northumberland. 
Aryilloecia ? aurea, sp. n., Brady, /. c. p. 16, pi. 8. figs. 4, 5, river Ouse at 
Lynn, — A. meridionalis, sp, n., Brady in Berchon and Folin, Fonds de la Mer, 
p. 198, pi. 27. figs. 9, 10, Magellan Straits. 
Candona Candida (Miill.), var. tumida, new var., C\ kinysleyi, diaphana, and 
hyalina, spp. nn,, Brady, 1. c. pp, 16-19, pi. 9. fig.s. 13-16, 9-12, 5-8, pi. 5. 
figs. 1-3 and 4-11, tidal rivers and lakes of Northumberland. 
Bairdia faaciata, sp. n,, Cape-Verde Islands ; anyulata and deivattrei, spp. 
nn., Magellan Straits. Brady in Berchon and Folin, Fonds de la Mer, p. 193, 
pi. 19. figs. 20, 21 ; p. 199, pi. 27. figs. 11, 12 and 17, 18. 
Metacypris, gen. nov. Shell moderately strong and thick, excessively 
tumid ; ventral surface deepl)'^ impressed along the central and posterior por- 
tions 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, 1. 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 Cypridae or the Cytheridae. 
Cytheridas. 
Cythei'e. Four species inhabiting the Black Sea mentioned; one of them, 
C. niyrcficens, Baird, figured by Czerniavski, Mat. zoogr. Pont. p. 62, pi. 4. 
fig. 11. 
Cy there Jidicula, sp. n., Brady, /. c. p. 21, estuaries of the rivers Thames, 
