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

OSTRACODA. 201
Scheldt, and Meuse.—C. canadensis and dawsoni, spp. nn., Brady, /. c. pp. 452,
453, pi. 19. figs. 4-6 and 8-10, Gulf of St. Lawrence; C. leioderma, Norman,
from the same locality, described and figured, ibid. p. 451, figs. 11-13.
Cythere silicula and margaritifera, spp. nn., Vera Cruz; curvistriata, sp. n.,
Cape Verde Islands; spongiosa and solandi, spp. nn., Pulo Pinang; margollei,
zurcheri, contractu, and cuboidea, spp. nn., Magellan Straits. Brady in Berchon
and Folin, Fonds de la Mer, parts xii. and xiii. pp. 192-201, pi 27. figs.
1-4, pi 19. figs. 22,23, pi 28. figs. 1-4, pi 27. figs. 5,6,13,14, and 17-22.
Cytheridea torosa (Jones), var. n., and incequalis, sp. n., Brady, Ann. N.
11.(4) vi. pp. 21, 22, pi 8. figs. 6, 7, and pi. 9. figs. 1-4, Northumberland.
C. littoralis, Brady, is a variety of the former, ibid, footnote.
Loxoconcha pusUla, sp. n., Brady, I. c. p. 23, pi 8. figs. 1-3, Frith of
Forth, some rivers in Norfolk, and Scheldt.—L.fragilis, G. 0. Sars, ibid.
p. 24, pi 10. fig. 3, Montrose Basin and Budle Bay.
Cytherura propinqua, sp. n., Brady, I. c. p. 24, pi. 10. figs. 1, 2, Thames
estuary.—C. undata, Sars, var., from the Gulf of St. Lawrence, Brady, ibid.
p. 454, pi 19. fig. 7.
Cytherideis foveolata, sp. n., Brady, 1. c. p. 454, pi 19. figs. 1-3, Gulf of
St. Lawrence.
Polycheles*, gen. nov. Shell fragile, structureless; lucid spots ten to
twelve, arranged in a subradiate manner. Right valve much larger. Superior
antenna? 6-, inferior 4-jointed, and bearing strong terminal claws. First
maxilla furnished with eight long and strong curved seta?, and with a long
biarticulate digit, which terminates in four curved claws. Third pair of feet
much the longest, armed with two strong curved claws and one shorter seta.
P. stevensoni, sp. n., Brady, 1. c. p. 25, pi 7. figs. 1-7, and pi 10. figs. 4-14,
tidal rivers and lakes of Northumberland, also in the Scheldt.
CYTHERELLIDJE.
Cytherella cuneolus, sp. n., Cape Verde Islands, and simUis, sp. n., Magellan
Straits. Brady, in Berchon and Folin, Fonds de la Mer, parts 12 and 13,
pp. 199, 202, pi 19. figs. 18,19 and 16, 17.
Xestoleberis polita, sp. n., Brady, in Berchon and Folin, Fonds de la Mer,
p. 202, pi. 27. figs. 15,16, Magellan Straits.
ENTOMOSTRACA.
COPEPODA.
CYCLOPID^E.
F. PLATEAU gives several physiological observations and experiments
concerning this family, and especially Cyclopsine
castor (Jurine), having employed Ehrenberg's carmine process.
Each eye has its proper optic ganglion. The heart, the genital
orifices, and the glands by which the ovisac is formed are described.
Electrical discharges of moderate intensity do not kill
the animal, but make it motionless for some time. Cyclops
quadricornis (Miill.) dies in sea-water after a few minutes,
* Preoccupied by C. Heller, 1862, in Crustacea.
1870. [VOL. VII.] *