184 Jonrs AND Kirkpy—On Carboniferous Ostracoda from Ireland. 
13. Leperditia Wrightiana, sp. nov. 
(Plate xm., figs. 4, 5.) 
Besides the foregoing species of Leperditia, there are two valves (from Carland) 
of another form, evidently belonging to this genus, but unknown to us, and 
apparently undescribed. These belong to the group of nearly featureless 
Leperditice, in which the usual characteristics are obsolete. 
The larger specimen, nearly oblong, is one-sixteenth inch in length; rather 
less than twice as long as high; higher and altogether larger behind than before ; 
and with a slightly oblique swing backward. The dorsal border is long and 
straight; the ventral border is boldly rounded, with a slight obliquity; and the 
anterior extremity is smaller than the posterior. The valves are convex, and 
appear to have been comparatively thin; a stout rim bounds their free margins ; 
and the surface, so far as can be judged, is smooth. 
Had these specimens been less in height, and thus relatively longer, they 
would have agreed with the characters of LZ. parallela*, Jones & Kirkby. In 
their general outline, they come somewhere between that species and the elongate 
forms allied to Z. Okeni, such as L. oblonga, Jones & Kirkby, Ann. Mag. Nat. Hist. 
ser. 3, vol. xv., 1865, p. 407, pl. xx., fig. 5. For the specimens under notice, we 
propose the name LZ. Wrightiana, in compliment to Mr. Joseph Wright, F.G.S., who 
supplied us with the Carboniferous Shale from Carland, near Dungannon. 
We have a Leperditia of somewhat similar outline, though of less size, from the 
Carboniferous Limestone of Clitheroe, Lancashire; but it has the surface covered 
with large and deep pits. Another possibly kindred form occurs in the 
Glencartholm beds of Eskdale, Dumfriesshire, which has also a pitted surface, 
somewhat like the last-mentioned. 
Now and then, among the countless multitudes of L. Scotoburdigalensis, as they 
occur in the Calciferous Sandstone of Fife, we have noticed a larger and longer 
form of carapace that does not fit in with any species already described, and 
which may be of near kinship to this form from Carland. 
14. Leperditia acuta, Jones & Kirkby. 
1865. Leperditia Okeni, var. acuta, Jones & Kirxsy, Ann. Mag. Nat. Hist., ser. 3, 
vol. xv., p. 406, pl. xx., figs. 4a, b. 
1884. -s a Jones & Kirxpy, Geol. Mag., dec. 3, vol. 1, 
p. 357, pl. xii, figs. 4a, 6. 
* Ann, Mag. Nat. Hist., ser. 3, vol. xv., 1865, p. 407, pl. xx., figs. 6a, 0. 
