02 BRITISH ENTOMOSTRACA. 



Abdomen bilobed at extremity, each lobe giving off 

 several short setae. 



Hah. — Salt-pans at Lymington, Hants ; Schlosser, 

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



Okdeii II— CLADOCERA.* 



Cladoceka, Lalreille, Cuv. Reguc Auim., iv, 151. 



— Burmeister, Beit, zur Naturg. dcr Rankenfuss. 

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



Daphnoides ou Cladockres, M. Echcards, Hist. Nat. Crust., iii, 372. 



— — Lucas, E.Kplor. Sc. de I'Algcrie. 



Character. — Body, except the head, which is distinct 

 and projecting, entirely inclosed within a carapace formed 

 of two valves, joined together on the back. Eeet 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— DAPHNIADiE. 



Daphnia, Mitller. 



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



Dapiinidiens, M. Edwards, Hist. Nat. Crust., iii, .374 (cxclus. Lynceus). 



Characfcr. — Superior antennae generally very small; 

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

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

 Eye single, large. Intestine straight. 



Bihliop-ajMcal Historij. — Swanmierdam is the first 

 author we know that has taken notice of any of the 



* KXofioc, a brand) ; and icfpac, a horn. 



