CRUSTACIEA. 301 
oval in shape, greenish grey in colour, fragile, semitransparent, and ribbed. 
6 mm. long, 3-4 mm, high. 
Head of the animal produced to a pointed beak. Protuberance above 
the neck. Anterior antennae long, the anterior margin having thirteen pro- 
tuberances on which are situated little lancet-like spines, which are most 
slrongly developed near the middle and decrease towards the extremity. The 
posterior or, as Dr. Klimzinger calls them, the steering antennae, because by 
them the animal entirely propels and directs itself through the water (the 
foliaceous appendages of the body being so feeble that in spite of their motion 
the animal sinlts to the bottom unless the antennae are in action) — the pos- 
terior antennae are nearly half as long again as the anterior, and consist of a 
wme- jointed peduncle supporting two flagella, consisting of 13 and 14 articuli, 
furnished on one side with spines and on the other with closely packed 
equal-sized hairs. The feet are twenty-two, and foliaceous. The two ante- 
rior pairs are subchelate in the male. The back of the animal is armed with 
spines or hairs, and terminates in two sickle-shaped appendages, which, with 
the posterior portion of the animal, are capable of being bent anteriorly and 
interiorly. The two globular compound eyes are united together by a suture 
in the median dorsal line. A large chalk-white organ situated in the inferior 
portion of the beak represents the simple eye. 
Dr. Klunzinger remarks that Africa appears to have produced, 
hitherto, the largest proportion of the species of Limnadia. 
Daphniidas. 
The Rev. A. M. Norman, in the sixth volume of the Tyneside Naturalists’ 
Field-club, 1863-G4, gives a description of the genus Acantholchcris of Lillje- 
borg {Acanthocercus, Schodler), as well as descriptions, with figures, of two 
species, together with some account of their habits^ that are new to Britain, 
viz. Ac. curvirostris (O. F. Miill.) and Ac. sordida (Lieven). 
Dr. Klunzinger contributes a paper (Zeitschr. wiss. Zool. Band xiv. p. 164) 
on the anatomy of Daphnia, and also a few observations on the freshwater 
fauna in the neighbourhood of Cairo. The Daphnia is longispina of Leydig, 
of which he found only females in some slightly brackish pools on the 
banks of tlie Nile. He observes that the parents carried about attached 
to them the young, after their escape from the ovum, for some time. In 
his description of the structure of the animal he dwells chiefly upon those 
parts which have been, he thinks, the least studied by naturalists. 
In his searches in the pools in the neighbourhood of Cairo, he found 
species of Sida^ Bosmina, and four new species of Daphnia, which he intends 
describing j and by their shells he was enabled to make out four kinds of 
Cypris ; he also found Cyclops quadricornk in the middle of the summer, and 
Cyclops castor in December. 
CYPR1D.E. 
Mr. George Brady describes several freshwater species new to 
Britain, among which are four new to science (Ann. & Mag. Nat. 
Hist. 1864, vol. xiii. p. 59, pis. 3 & 4). 
They are Cypris ohlonga, sp. n., C. striolata, sp. n., C. affinis (Fischer), Cau^ 
