Jones AnD Kirksy—On Carboniferous Ostracoda from Ireland. 199 
41. Bairdia brevis, Jones & Kirkby. 
1867. Bairdia brevis, . . Jones & Kirxsy, Trans. Geol. Soc. Glasgow, vol. 
ll., p. 221; 1879, Quart. Journ. Geol. Soc., 
vol. xxxy., p. 575, pl. xxxi., figs. 1-8; 1880, 
Quart. Journ. Geol. Soc., vol. xxxvi., p. 587; 
1885, Geol. Mag., dec. 3, vol. ii, p. 540; 
1886, Quart. Journ. Geol. Soe., vol. xlii., p. 
013; 1887, Proc. Geol. Assoc., vol. ix., p. 512. 
Subrhomboidal and variable, sometimes obliquely acute-oval; short and thick. 
Not rare in the Carboniferous Limestone of England and Scotland. Found also 
in that formation at Castle Espie. 
Notes ON THE SPECIES FROM CASTLE EspIn. 
The specimens from the red Carboniferous Limestone of Castle Espie are not in 
good preservation, though most of them are carapaces,—not single valves. Many 
of them are distorted by pressure, and none show the true surface. This renders 
it difficult in many cases to say to what species the specimens belong, further than 
that they are Bairdiw. Most of them are of this genus. 
Bairdia plebeia, Reuss, is the most common ; and it occurs both in its typical 
form, and in one of its more elongate varieties. 
B. submucronata, Jones & Kirkby, is represented by a less number of indi- 
viduals ; the posterior extremity of some is drawn out somewhat after the fashion 
of B. mucronata, Reuss. 
B. brevis, Jones & Kirkby, is present, but very sparingly. 
B. subelongata, Jones & Kirkby, also occurs rarely, in full-sized examples. 
The only other determinable form in this lot is Cytherella recta, Jones & 
Kirkby, of which there is a single well-grown carapace; see above, page 178. 
Nore.—27* SyNAPHE ANNECTENS, var. CONFUSA, nov. 
(Plate xu., figs. 11 and 14.) 
In some specimens of Synaphe, from Cultra, the thin longitudinal ridge is 
replaced by a broad, swollen, ventral band, connecting the two tubercles, and 
giving a subquadrate shape to the dorso-central depression. ‘This form has some 
relationship to ‘‘ Ulrichia? confluens,” Ulrich (Journ. Cinn. Soc. N. H., vol. xiii, 
part 2, 1891, p. 208, pl. xii., fig. 11), from the Carboniferous Shales of Kentucky. 
2H 2 
