pene) 
VII. 
ON CARBONIFEROUS OSTRACODA FROM IRELAND. 
By T. RUPERT JONES, F.R.S., anv JAMES W. KIRKBY. 
(Pirates XI. anp XII.) 
[COMMUNICATED BY PROFESSOR W. J. SOLLAS, LL.D., F.R.S. | 
[Read Marcu 18, 1896.] 
INTRODUCTION. 
In 1866, Messrs. Jones and Kirkby made a critical examination of all that had 
been published about the Carboniferous Entomostraca of Ireland.* Thirteen 
species were tabulated at p. 49, op. cd¢., with their localities, according to indica- 
tions given by Professor M‘Coy in the ‘ Journ. Geol. Society Dublin,” vol. ii., 
1839; and more especially in his ‘‘ Synopsis of the Characters of the Mountain- 
limestone Fossils of Ireland,” 1844. In determining these species Messrs. Jones 
and Kirkby had been favoured by Sir Richard Griffith with the opportunity of 
studying the specimens which Professor M‘Coy had examined and named. Other 
specimens had been submitted to them for examination by the officers of the 
Geological Survey (see pages 48-51 of the same Memoir); but they mostly repre- 
sented the same species as were enumerated in the Table at p. 49. 
Of the Entomostraca alluded to above, the majority are Ostracoda of the 
Podocopa group, more or less allied to the Cytheride ; only three or four belong 
to the group of the Myodocopa, namely Cypridinide and Entomoconchide. 
In 1874, however, thirty-one of the latter great group were described and 
figured, as occurring in Ireland, in the ‘‘ Monograph Brit. Foss. Biv. Entom. 
Carbonif. Formations,” by Jones, Kirkby, and Brady, pt. 1., Palawont. Soe. 
One of the Cytherellide, belonging to the Platycopa group, and an Ostracod 
were included in the Second Number of that Part in 1884, p.72. In the “Journ. 
Roy. Geol. Soc. Ireland,” N.S., vol. v., pt. 8, 1880, pp. 90 and 94, Mr. W. H. 
Baily enumerated a few Irish Carboniferous species that had been named by 
Kirkby and Jones. In the “ Quart. Journ. Geol. Soc.,” vol. xlii., 1886, pp. 508— 
513, ten species are tabulated by Jones and Kirkby, none of them new. 
* See the ‘‘ Ann. and Mag. Nat. Hist.,” ser. 3, vol. xviii., pp. 37-51. 
TRANS. ROY. DUBL. SOC., N.S. VOL. VI., PART VII. 
