134 



POST-TERTIARY ENTOMOSTRACA. 



2. Candona detecta {Miiller). Plate I, figs. 7 — 9. 



1785. Cypris detecta. Miiller. Entoraostraca, p. 49, tab. iii, figs. 1 — 3. 

 1850. Candona — Baird. Brit. Entom., p. 161. 



1868. — — Brady. Monog. Recent Brit. Ostrac, p. 384, pi. xxiv, figs. 



35 — 38, and pi. xxxvii, fig. 2. 



Carapace, as seen from the side, elongated, reniform, greatest height situated in the 

 middle, and equal to half the length ; extremities nearly equally rounded, the posterior 

 rather narrower and flatter; superior margin evenly arched, inferior sinuated in the 

 middle; seen from above, ovate, widest in the middle, width less than the height, 

 extremities acuminate, the anterior the more acute. Shell surface quite smooth or very 

 faintly punctate. Colour whitish. 



Length, 4^th of an inch, 



C. detecta approaches very nearly the following species, C. lactea, and in some cases 

 is not easily separable from it. It is, however, a smaller species, and more distinctly 

 curved or reniform in outline wdien viewed laterally. 



Distribution. Becetii. — England, Germany. 



Fossil. — England : Branston Fen. 



3. Candona lactea, Baird. Plate I, figs. 14 — 16. 



1850. Candona lactea, Baird. Proc. Zool. Soc. Lond., p. 255, pi. xviii (Annulosa), 



figs. 25—27. 



1868. — — . Brady. Mouog. Recent Brit. Ostrac, p. 382, pi. xxiv, 



figs. 55 — 58. 



Shell, as seen laterally, subreniform, height equal to half the length and nearly equal 

 throughout ; anterior extremity well and evenly, posterior somewhat obliquely rounded ; 

 superior margin straight in the middle and sloping towards the extremities, inferior very 

 slightly incurved ; seen from above, the outline is regularly ovate, with moderately and 

 nearly equally acuminate extremities, greatest width situated in the middle and scarcely 

 equalling half the length. Surface of the shell smooth, yellowish-white. 

 Length, y^^rd of an inch. 



Distribution. Recent. — Holland, Great Britain, Ireland. 



Fossil. — England : Hornsea, Whittlesea, Branston Pen. South Wales : Cardiff 

 new dock basin. Ireland : Belfast new docks. Scotland .- Crofthead. 



