28.2 Dr. W. Baird on new species of Entomostracous Crustacea. 



size. The superior antennae, underneath the beak, are rounded, 

 of considerable size, and terminated by four or five short seta?. 

 The inferior antennae have the basal portion stout and thick ; 

 the joints are all rough with minute spines; filaments plumose. 

 In the number of joints and filaments it agrees with D. pulex. 

 The surface of the carapace is rough with minute spines, and is 

 finely reticulated ; it is of a very light colour. The eye is large, 

 and the black spot near the beak is very distinct, almost as 

 much as that of the Lynce'xdce. The abdomen is narrow, the 

 lower edge armed with a row of short spines, and the termi- 

 nating spines rather strong and hooked. The sixth segment of 

 the body has three spurs or projections, the upper one of which 

 is curved upwards, the lower sending off two rather long setae, 

 which are plumose only on the lower half of their length. 



I have only seen females. 



Hab. Pool of Gihon, Jerusalem. 



Approaches very near D. pulex. Ephippia, from which these 

 young most probably spring, are different in shape, being longer, 

 narrower, and sharp-pointed. 



Oypris celtica. PL VI. fig. 1. 



Carapace wedge-shaped, like the most usual form of the stone 

 implements known by the name of celts. Anterior extremity 

 considerably broader than the posterior, and compressed. Pos- 

 terior extremity pointed and compressed also. Dorsal margin 

 rounded, convex. Ventral margin nearly straight, or very 

 slightly sinuated. Surface of carapace very smooth and shining, 

 destitute of all appearance of hairs or pubescence. The interior 

 of the valves, owing to the compression of the two extremities, 

 hollow in the centre only ; each valve, for a short distance at 

 each extremity, lying upon the other so as to fill up the hollow, 

 and limit the space allowed for the animal, to about the centre. 



Pediform antennas furnished with a rather long pencil of 

 plumose filaments. The colour of the shell is a light olive- 

 green, with a lighter streak running diagonally across the pos- 

 terior part of the carapace. 



This species resembles somewhat the British species C. clavata 

 in the shape of the carapace, but is shorter, has no hairs or setae 

 on its surface, and has larger pediform antennae and feet. 



Hab. Pool of Gihon, Jerusalem. Mus. Brit. 



Cypris orient alls, PI. VI. fig. 2. 



Carapace of nearly a reniform shape; dorsal margin convex Iy 

 rounded ; ventral margin rather deeply sinuated. Anterior ex- 

 tremity slightly compressed. Posterior extremity nearly of the 



