49 Crust, 
CRUSTACEA. 
OSTRACODA. 
G. S. Brady gives an analytic table of the known families, descriptive 
and critical notes on most of the known marine genera (3 new), and 
descriptions and figures of 141 new marine species, in Zoology of H.M.S. 
‘Challenger,’ i. pt. 3, 184 pp., 44 pis. Interesting general remarks cn 
the geographical and bathymetrical distribution of the marine Ostracoda 
are given, pp. 1-5. They are much scarcer in the greater depths than 
between tidemarks and in the Laminarian zone, and almost absent in the 
Glohigerina-oozQ and red clay ; 19 (or rather 17) species were obtained 
from depths exceeding 1500 fath., most of them incapable of swimming, 
and therefore indigenous to the depth, not transported or subsided ; 52 
are enumerated from depths exceeding 500 fath. Three new genera are 
described, but none of them exhibits striking, unexpected, or remarkably 
palaeontological features. Two natatory pelagic species, Halocypris 
atlantica (Lubbock) and hrevirostris (Dana) are cosmopolitan. 6 British 
species have been found at Kerguelen, but not at intermediate stations. 
Macrocypris, Bairdia, and Cytherella are especially strongly represented 
in the Australasian province. 
Parthenogenesis observed in Cypris incongrua, fiiscata, reptans^ and 
vidua, only females being found in the three former; sexual reproduction 
and parthenogenesis observed in C, vidua and in Candona Candida. 
Weismann, Zool. Anz. iii. pp. 82-84 ; abstract in J. R. Micr. Soc. hi. 
p. 431. 
Males are exceedingly rare and sporadic in Cypris ornata, puhera^ 
fasciata, fuscata, aurantia, aculeata, affinis, and hicolor, whereas they are 
common at all seasons in C. ovum, punctata, dispar, Notodromus monachal 
Candona Candida and fahiformis, and probably in all species of Cythere 
and Cypridina. Cypris ornata is very prolific ; it produces about 20 eggs 
every second day, or 200-300 in all. Several differences in the sexual 
organs, their mode of copulating and spawning, and the sexual differences 
of various species of Cypris, are described by W. Muller, Z. ges. Naturw. 
(3) V. pp. 221-235, pi. iv. 
Observations on the sexual organs, sexual difference of the shells, 
occurrence of males, and viviparity of some Cytlieridce ; id. 1. c. pp. 237- 
245, pi. V. 
Systematic table of the 7 recognized families of Ostracoda by Brady , 
1. c. p. 6. 
CyPRIDiE. 
Cypris hicolor, sp. n., W. Muller, 1. c. p. 236, pis. iv. figs. 24-26, Thu- 
ringia, in slowly current or stagnant water. 
Cypris granulata, sp. n. [not described], Robertson, P. N. H. Soc. Glasg. 
iv. p. 18, Scotland. 
Candona. Variability in the male sexual organs in the same species, 
probably depending on maturity and age ; Muller, 1. c. p. 233. 
Candona euplectella and nitens, spp. nn. [not described], Robertson, 
1. c. pp. 23 & 25, Scotland. 
