CANDONA. 161 



prominent or gibbous in the centre, and glabrous, the 

 edges being fringed with rather long hairs. The colour 

 is of a light whitish-green, variegated with marks on the 

 anterior and posterior margins ; and on the sides, of the 

 same colour, but of a deeper hue. 



Hab. Neighbourhood of London, summer months. 

 Yetholm Loch ; Newnham Loch, Northumberland, Dr. 

 Johnston. 



3. CANDONA HISPIDA. Tab. XIX, fig. 4. 



CYPRIS HISPIDA, Baird, Trans. Berw. Nat. Club, i, 99, t. 3, f. 14, 1835 ; 



Mag. Zool. and Bot., ii, 135, t. 5, f. 6. 

 M. Edwards, Hist. Nat. Crust., iii, 405. 

 CANDONA HISPIDA, Baird, Traus. Berw. Nat. Club, ii, 153, 1845. 



Shell oval, rather ventricose, the anterior extremity a 

 little broader than the posterior. The colour is a uniform 

 brown, with one or two marks of a deeper hue running 

 across the centre ; both extremities partaking of the same 

 dark shade. The valves are very hispid, their surface 

 being covered with spines rather than hairs. 



Hab. Neighbourhood of London ; Yetholm. Summer 

 months. 



4.- CANDONA DETECTA. 



CYPRIS DETECTA, Midler, Zool. Dan. Prod., No. 2386, 1776 ; Euto- 



mostraca, 49, t. 3, f. 1-3. 

 Bosc, Man. d'Hist. Nat. Crust., ii, 295. 

 Latreille, Hist. Nat. Crust., iv, 211. 

 Leach, Edinb. Encyc. art. Crust., vii, 388. 

 Baird, Mag. Zool. and Bot., i, 525. 

 Lamarck, Hist. An. s. Vert., v, 124. 

 MONOCULUS DETECTUS, Gmelin, Linn. Syst. Nat., 3001, No. 36. 



Manuel, Euc. muth., vii, 725, No. 30, t. 266, 



f. 15-17. 



Sees, Eucyclop., art. Mouoculus. 



SMOOTH WHITE INSECT, Mutter, Phil. Trans,, Ixi, 230, t. 7, f. 1-3. 

 CANDONA DETECTA, Baird, Trans. Berw. Nat. Club, ii, 153, 1S45. 



Shell oblong oval; the anterior extremity rather narrower 



11 



