Jones AND Kirxkpy—On Carboniferous Ostracoda from Ireland. 185 
1885. Leperditia Okeni, var. acuta, Jones & Kirxsy, Geol. Mag., dec. 3, vol. ii., 
p. 540. 
1886. e a » Jones & Kirxpy, Quart. Journ. Geol. Soc., vol. 
xli., p. 510; Ann. Mag. Nat. Hist., ser. 5, 
vol. xviil., p. 256, pl. vii., fig. 9. 
There are two or three carapaces of this Leperditia from Carland. They agree 
well with the figure given of the species in the “Annals of Natural History” 
in 1886, and can be distinguished from ZL. Okeni by the smaller and sharper 
anterior extremity. 
LI. acuta is of rare occurrence, but is known from the Lower Carboniferous 
strata of Scotland, Westmoreland, Northumberland, Somerset, and Bavaria; and 
from the Coal-measures of Nova Scotia. 
» 
15. Leperditia rhombica, sp. nov. 
(Plate x11., fig. 6.) 
Together with Z. Okenz, in the Carland Shales, occur some larger forms, having 
the ventral margin more strongly arched, and the posterior extremity subangulate. 
In the latter respect, it is suggestive of L. Youngiana,* Jones & Kirkby, but differs 
from that species in the dorsal angles, and in the non-punctate surface and more 
swollen curvatures of the valves. It is an ally of LZ. Okeni; and, as in the case 
of so many other congeneric forms, it is more convenient to regard it as a 
“species” than to catalogue it as one of the varietal modifications. 
16. Leperditia compressa, Jones & Kirkby. 
1867. Leperditia compressa, . Jones & Kirxsy, Trans. Geol. Soc. Glasgow, vol. 11., 
p- 219; 1886, Ann. Mag. Nat. Hist., ser. 5, 
vol. xvill., p. 256, pl. vii., figs. 7a, 4; 1886, 
Quart. Journ. Geol. Soc., vol. xlu., p. 511; 
1887, Proc. Geol. Assoc., vol. ix., p. 504. 
Sub-oval; hinge-line distinct, without angles; surface smooth, and very much 
flattened ; variable in some of its features. 
In Lower Carboniferous rocks in Stirlingshire and Durham, and in the 
Carboniferous Limestone near Bundoran, Co. Donegal. 
* Ann. Mag. Nat. Hist., ser. 5, vol. xviii., 1886, p. 254, pl. vii., figs. 3a, b,c. 
