196 JONES AND KrrKpy—On Carboniferous Ostracoda from Ireland. 
An elongate narrow variety of this species occurs at Carland. It has the 
straight hinge-line, anterior and posterior dorsal slopes, obliquely rounded front, 
and sharply outstanding hinder end of the type, with a somewhat sinuous ventral 
border. But, instead of being stout, large, and sub-oblong, like the type, this 
specimen presents a neat, elongate, narrow, and subfusiform outline. 
At first sight it might seem to be B. subelongata or B. subcylindrica, but it 
retains too much of the angular back of B. Hisingeri to be separated from that 
species. 
36. Bairdia, sp. 
An indeterminate sub-rhomboidal cast probably of a Bairdia occurs at Carland. 
It reminds us of Bairdia precisa, Jones & Kirkby, Quart. Journ. Geol. Soc., vol. 
xxxv., 1879, p. 577, pl. xxxil., figs. 1-6, but it is longer and differently pro- 
portioned. 
37. Bairdia curta, M‘Coy. 
(Plate xu. figs. 21a, 0.) 
1844. Bairdia curtus [ta], . M‘Coy, ‘‘Synops. Char. Carb. Foss. Ireland,” p. 166, 
pl. xxuu., fig. 15. 
1859. Bairdia curta, . . . Kirxsy, Tr. Tyneside N. F.C., vol. iv., pp. 142, 158. 
1866. 3 » «+ + + Jones & Kirxsy, Ann. Mag. Nat. Hist., ser. 3, vol. 
Xvill., pp. 41, 42; 1867, Trans. Soc. Geol. 
Glasgow, vol. i1., p. 221. 
1870. %) » + + + dongs, Monthly Microsc. Journ., vol. iv., p. 185, 
pl. txu tgs. ta, Os vol. x.) Oro, padie 
1879. es ,, (and vars.) Jones & Kirxsy, Quart. Jour. Geol. Soc., vol. xxxv., 
p. 567, pl. xxviii., figs. 1-8; 1886, vol. xlii., 
p- 513. 
1885. 9 53 . . Jones & Kirxsy, Geol. Mag., dec. 3, vol. 1., p. 540; 
1886, Proceed. Geol. Assoc., vol. ix., p. 512. 
1884. 5 - . . Vine, Proc. Yorksh. Geol. Polyt. Soc., N.S., vol. 
Vill., p. 231. 
When first seen by us, Sir R. Griffith’s specimen, figured by M‘Coy, seemed to 
be aimost, if not quite, the same as B. plebeia, Reuss, but after it was quite freed 
from its matrix, we recognized its distinct individuality. 
This species is well known in the Carboniferous strata of England, Scotland, 
