20 THE ENTOMOSTRACA OF 



Dorsal profile lanceolate, or elongate-oval, with the ends acute and nearly equal ; 

 anterior, broadly ovate. 



Candona Candida is very common in the mud of ponds and rivers ; and occurs 

 equally abundantly in the peat-deposits of Berkshire (at Newbury), and Cambridge- 

 shire ; in the shell-marl of the Forfarshire lakes, described by Sir C. Lyell, ' Geol. 

 Trans./ 2d ser., vol. ii, p. 73 ; in the fresh-water beds at Copford ; and in the pleisto- 

 cene beds of Clacton and Grays, in Essex. 



No. 5. Candona (?) suByEQUALis, spec. nov. Plate I, fig. 9 a — 9 c. 



INCH. 



Length, -^ Recent? 



Post-tertiary : Essex. 



Carapace rather large, very convex, reniform ; anterior and posterior extremities 

 nearly equal ; dorsal margin arched, the curve being nearly uniform throughout its 

 length ; ventral margin incurved. Surface thickly studded with fine pimples, or 

 pedicles of setae. Lucid spots 7 — 8, forming four irregular oblique rows (System a). 



This species differs from C. Candida in its shape, setation, and lucid spots ; but 

 resembles it in general character. It much resembles in outline Cypris lutraria, Koch 

 ('Deutsch. Crust./ xxi Heft, t. 15), and C. elliptica. Baird ('Hist. Brit. Entom./ 

 p. 158, t. 19, fig. 12) ; but the means of comparison at command are unsatisfactory. 



Candona (?) subcequalis occurs not uncommonly in the post-tertiary fresh-water 

 deposit at Copford, near Colchester. 



Sub-genus (?) — Cyprideis, nov. 



[At page 9 (in a note added while these sheets were in the press,) I have mentioned 

 my reasons for expecting that, on further examination, this form will prove to be a 

 Cythere. As I have not had any opportunity of getting living specimens, I leave the 

 description of this interesting and peculiar form in the place it occupied in my MS., 

 and under the same provisional subgeneric heading. (November, 1856.)] 



Animal 1 having the pediform antennae hooked, not plumous, and the superior 

 antennae apparently simply setiferous. Carapace oblong ; marginal edges thickened, 



1 Not yet examined in a fresh state. 



