160 BRITISH ENTOMOSTRACA. 



Cypris. The others are deficient in this apparatus, and 

 instead of swimming gaily through the Umpid element, 

 crawl in the mud at the bottom of the pools in ^vhich they 

 are found, or creep along the aquatic plants which grow 

 there, and if dropped into a glass of water, fall to the 

 bottom, without being able to suspend themselves for the 

 shortest time. These constitute the genus Candona, which 

 I first published in the ' Trans. Berw. Nat. Club,' ii, p. 

 152, 1845, and afterwards in the 'Ann. and Mag. Nat. 

 Hist.,' xvii, p. 414.* 



1. Candona lucens. Tab. XIX, fig. 1. 



Cypris lucens, Baird, Traus, Berw. Nat. Club, i, 100, t. 3, f. 15, 1835 . 

 Cypris Candida, Baird, Mag. Zool. and Bot., ii, 13i, t. 5, f. 3. 

 Candona Candida, Baird, Trans. Berw. Nat. Club, ii. 153, 1845. 

 Cypris pelltjcida, Koch, Deutscli. Crust., h. xi, t. 5, 1837. 

 Cypris lucida (?), Koch, Deutsch. Crust., b. xxi, t. 18, 1838. 



Shell somewhat reniform, arched on the upper margin, 

 and sinuated underneath. The valves are ventricose in 

 the middle, smooth, except round the edges, which are 

 fringed with fine short hairs, shining, of a pure white 

 colour, with a pearly lustre, and nearly opaque. The 

 anterior extremity is narrower and flatter than the pos- 

 terior, which is prominently arched on the upper angle, 

 and prolonged inferiorly to a short point. 



Hab. — Neighbourhood of London, Cockburnspath, 

 Yetholm, &c. ; summer and autumn months. 



2. Candona reptans. Tab. XIX, figs. 3, 3«. 



Cypris reptans, Baird, Traus. Berw. Nat. Club, i, 99, t. 3, f. 1 1, 1835 ; 

 Mag. Zool. and Bot., ii, 135, t. 5, f. 5. 

 — M. Edwards, Hist. Nat. Crust., iii, 400. 



Candona reptans, Baird, Trans. Berw. Nat. Club, ii, 153, 1845, 



Shell ovate elliptical, nearly plane on upper margin, 

 and slightly sinuated underneath. The valves are rather 



* For further characters of this genus, see the forthcoming monograph 

 of the 'Entomostraca of the Cretaceous Formation of England,' by T. Rupert 

 Jones, Esq., publishing by the Palaeontographical Society. 



