Jones AND Kirxkpy—On Carboniferous Ostracoda from Ireland. 195 
as Cythere teres,* Paradoxstoma Hibernicum,t and Krithe reniformist. To this last 
species we have to refer the specimen before us as being almost identically the 
same in shape. There are, however, some slight differences. 
Both Dr. Brady’s K. reniformis and the Cultra specimens are elongate and 
sub-cylindrical, with straight hinge-line (rather more than half the entire length), 
and slightly incurved ventral border, neatly rounded posterior, and broader 
(higher) and somewhat obliquely rounded anterior extremity, valves convex, thin, 
and smooth. 
In our fossils, however, the ventral incurve is more median, and their profile 
or edge-view has equally acute ends, and is not lanceolate as in the recent form. 
Neither the figured recent nor our fossil specimen is truly ‘‘ reniform” in the usual 
acceptation of the term. Making the most of the slight differences in shape, 
thinking it best to give our specimens a specific name, and keeping within 
touch of G. 8. Brady’s species, we name ours K. subreniformis. 
344. Krithe subreniformis, var. elongata. 
(Plate x11, fig. 19.) 
Among the material from Carland we find the interesting specimen, fig. 19, 
which can only be an outgrown individual, or elongate variety of the foregoing 
K. subreniformis. It is somewhat more hollow on the ventral border, and its 
anterior moiety is not so high, but there are no essential differences apparent. 
35. Bairdia Hisingeri (Miinster), variety. 
1830. Cythere Hisingert, . . Munster, Jahrbuch fiir Miner., &., p. 65, No. 18. 
1858. Bairdia Schaurothiana, Kirxsy, Ann. Mag. Nat. Hist., ser. 3, vol. ii, 
p. 829, pl. x., fig. 14; 1859, Trans. Tyneside 
Nat. Field-Club, vol. iv., p. 147, pl. ix., fig. 14 
and woodcut 10. 
1865. »,  Misingeri, . Jones & Kirxsy, Ann. Mag. Nat. Hist., ser. 3, vol. 
xv., p. 408, pl. xx., figs. 12a—c; 1879, Quart. 
Journ. Geol. Soc., vol. xxxv., p. 570, pl. xxix., 
figs. 4-10; 1880, Quart, Journ. Geol. Soc., vol. 
Xxxvi., p. 587; 1885, Geol. Mag., dec. 3, vol. 
i., p. 540; 1895, Ann. Mag. Nat. Hist., ser. 6, 
vol. xvi., p. 454, pl. xxi., fig. 1. 
* Trans. Roy. Dub. Soc., ser. 2, vol. iv., 1889, p. 138, pl. xiv., figs. 86, 37. 
t Ibid., p. 232, pl. xxi., figs. 15-17. t Ibid., p. 182, pl. xxi, figs. 23, 24. 
