02 BRITISH ENTOMOSTRACA. 



Abdomen bilobed at extremity, each lobe giving off 

 several short setae. 



Hal). Salt-pans at Lymington, Hants ; Schlosser, 

 Rackett, S. Stevens, Esq., 1848; British Museum. 



ORDER II CLADOCERA * 



CLADOCERA, Latreille, Cuv. Regue Anim., iv, 151. 



Burmeister, Beit, zur Naturg. der Rankcnfuss. 

 DAPIINIDES, Straus, Mem. Mus. d'Hist. Nat. v. 

 DAPHNOIDES ou CLADOCKRES, M. F.<//';/,-<1s, Hist. Nat. Crust., iii, 372. 



Lucas, Explor. Sc. de 1'Algerie. 



Character. Body, except the head, which is distinct 

 and projecting, entirely inclosed within a carapace formed 

 of two valves, joined together on the back. Feet four to 

 six pairs ; articulations partly cylindrical, but chiefly fo- 

 liaceous, branchiform, and not adapted for organs of mo- 

 tion. Eye single, and very large. Antennae two pairs ; 

 inferior branched, large, and performing the functions of 

 swimming organs. Mandibles without palpi. 



Family I DAPHNIAD.E. 



DAPHXIA, MiiUer. 



DAI-IINIDES, Straus, Ainu. Mus. d'Hist. Nat., v. 



DAPHNIDIENS, M. EJic<if<1.*, Hist. Nat. Crust., iii, 371 (cxclus. Lynceus). 



Character. Superior antennae generally very small ; 

 inferior, large, almost always two-branched. Five or six 

 pairs of feet, all inclosed within the valves of the carapace. 

 Eye single, large. Intestine straight. 



Bibliographical Ilixfon/. Swammerdam is the first 

 author \ve know that has taken notice of any of the 



, a branch ; and Ktpac, a lioru. 



