294 
HISTORY OF BRITISH CRUSTACEA. 
is widely distributed both recent and as a fossil. Mr. Jones 
says that as a recent species it occurs in Britain, in the West 
Indies, Mauritius, Manilla, and Australia. It has been found 
in the London clay of Copenhagen Fields. See ‘ Entomo- 
straca of the Tertiary Formation/ p. 52. 
Fam. II. CTPRIDINADM , Baird. 
Eyes two, pedunculated. Two pairs of feet-like antennae. 
Two pairs of feet, one always within the shell. Abdomen 
ending in a broad lamellar plate, armed with strong claws 
and hooked spines. 
Gen. 159. CYPBIDINA, M. Edwards. 
This genus, the characters of which are those of the fa- 
mily, is essentially marine. The pair of feet within the shell 
forms a peculiar organ, apparently for supporting the ova. 
Some of the exotic species are highly luminous, and are 
described by Mr. Arthur Adams, who observed one in the 
Eastern seas, as being very quick in motion, darting about 
with great velocity, and constantly revolving. 
Cypridina Macandrei, Baird. (Plate XYII. fig. 2.) — 
Shell oval, sharply pointed at both ends; convex surface 
dotted over with small points; anterior edge deeply notched. 
