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. CTPR1DINADJE, Baircl. 

 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. CYPBXDINA, 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, Baircl. (Plate XVII. fig. 2.) — 

 Shell oval, sharply pointed at both ends; convex surface 

 dotted over with small points; anterior edge deeply notched. 



