216 POST-TERTIARY ENTOMOSTRACA. 



1869. ScLERocHiLXJS (?) GRACILIS, Brachj and Robertson. Ami. Mag. N. H., ser. 



iv, vol. iii, p!. xx, 

 figs. 11, 12. 



Carapace, seen laterally, elongated, subtriangular, greatest height situated in the 

 middle, and equal to less than half the length ; extreaiities nearly equal, narrowed, and 

 sharply rounded, superior margin very boldly and evenly arched, inferior gently sinuated 

 in the middle. Seen from above, ovate, W\i\\ equal obtusely pointed extremities ; greatest 

 width situated in the middle, rather less than the height. Shell-surface smooth, destitute 

 of ornament of any kind, but in recent specimens often beautifully banded with dark 

 olive or black. 



Length, -g^th of an inch. 



Distribution. Recent. — Britain, Ireland, Norway. 



Fossil— '&coi\sindi : Loch Gilp, Cartsdyke, West Tarbert. South Wales : Cardiff New 

 Dock-basin. Ireland : Belfast New Dock. 



6. Paradoxostoma flexugsum, Brady. Plate XVT, figs. 19, 20. 



1866. Bythoctthere (?) flexuosa, Brady. Brit. Assoc. Keport, 1866, p. 211. 



1868. Paradoxostoma elexuosum, Brady. Mouog. Rec. Brit. Ostrac, p. 461, pi. 



XXXV, figs. 30 — 34. 



1872. — — Brady and Robertson. Ann. Mag. N. H., 



ser. iv, vol. ix, 

 p. 55, pi. i, figs. 

 8,9. 



Carapace, seen laterally, elongated, flexuous, greatest height situated near the middle, 

 and equal to rather more than one third of the length ; extremities sharply rounded, the 

 anterior being the narrower and more acute, superior margin boldly and equally arched, 

 inferior distinctly sinuated in front of the middle, gently convex behind. Seen from 

 above, much compressed, ovate, extremities acuminate, greatest width in the middle, and 

 equal to about one fourth of the length. Surface of the shell smooth, marked usually 

 with very faint and delicate longitudinal striae. 

 Length, -j^th of an inch. 



The longitudinal striations referred to in this description are imperceptible except 

 with a tolerably high microscopic power, and they exist probably in all — certainly in 

 many others — of the genus. 



Distribution. Recent. — Britain. 



Fossil — Scotland -. Loch Gilp. South Wales : Cardiff New Dock-basin. 



