CYPEIDEIS. 287 



Casdona hispida, Baird. — Shell oval, uniform brown; 

 valves very rough ; surface covered with spines. 



Hab. Near London, and Yetholm. 



Candona detecta, Miiller, sp. — Shell oblong, oval, 

 valves flattened, pellucid, quite smooth, anterior part rather 

 narrower than posterior ; colour dull-white. 



Hab. Near London, etc. 



Candona similis, Baird. — Shell elliptical, flat, narrower 

 behind than in front; white, with two orange spots on back. 



Hab. Clapham Common. Dr. Baird observes that the 

 motion of this species is very deliberate; when it creeps 

 along the plants, it first puts one foot forward and then lei- 

 surely draws up the other. 



Candona lactea.* — Valves of the carapace oblong, 

 ovate, the surface smooth and shining, and of a dull size. 



Hab. Charing, Kent; and Regent's Park. 



A very small species. 



Cyprideis toeosa, Rupert Jones. (' Entomostraca of the 



Tertiary Formation/ p. 21, pi. ii. fig. 1; and woodcut, p. 



16, fig. 2.) — Pound in the pleistocene sands of Essex; 



* A species described by Dr. Baird, in the Proc. Zool. Soc. subsequently 

 to the publication of his work. 



