gonophores or generative buds of Graptolites (possibly of D. pristis), and that they are analogous to those of the Sertularidae, as in Sertularia fallax, pumila, &c.[1]
The following are the species from this locality.
- ***Diplograpsus pristis.
- —mucronatus, prob. synonym.
- —bicornis, Hall, with appendages at the proximal end as figured by Mr. Carruthers under the name of D. pristis.
- Didymograpsus sextans.
- Cyrtograpsus gracilis (Hall). This pretty branching species, not uncommon at this locality, is easily recognized from Hall's figure[2], as characterizing the Utica slate and Hudson-River groups: of the single serrated forms, the remaining species are
- Graptolithus Hisingeri (=Sagittarius).
- —tenuis.
About one mile and a half from this locality, and two miles south-west of Broadford, in the same county, single-celled Graptolites only were collected; these I have referred to G. priodon.
In the townland of Kilnacreagh, three miles east of Six-mile Bridge, the species observed were Graptolithus priodon and tenuis, with a diverging form referred to Didymograpsus Forchhammeri, the accompanying fossils being of an Upper-Silurian type.
At a few other places in the same county, and near to the last-named locality, there are similar Graptolites associated with Upper-Silurian fossils, as at the Townland of Glenagross, three miles and a half E.S.E. of Six-mile Bridge, where Graptolithus priodon is found associated with Cardiola interrupta and a Crinoid allied to, if not identical with, Actinocrinus pulcher, a Wenlock species.
At Trough Cottage, Clare, 6 miles east of Six-mile Bridge, Graptolithus priodon occurs associated with the same Crinoid. Half a mile E. of the preceding locality, in the same townland, Graptolithus priodon and G. tenuis were the species observed.
In the adjoining county of Tipperary, Mr. A. B. Wynne (now of the Geological Survey of India), whilst surveying the district, discovered many fossil localities; at several of them Graptolites occurred associated with Upper-Silurian fossils, such as Euomphalus discors, Cardiola fibrosa and interupta, Orthoceras &c. Graptolithus priodon, the characteristic Upper-Silurian species, and most abundant of the single-celled forms, occurs at the following localities in this county, viz.:—at Boosnafarney; Cloncannon; Big Park, near Latteragh; Knocknagoogh, S.E. of Latteragh, in profusion; N.W. of Barnane House in an uncompressed state; Garrangreena; Gortnaskea; Curreeny common, &c.; and, accompanied by Graptolithus tenuis and Graptolithus Hisingeri (=Sagittarius) at Reaghfadda.
The pretty little branching species, Cyrtograpsus hamatus, Baily, sp.[3], was collected by Mr. Wynne at Garrangreena and Kilmacuddy, in the same county.
On Knockshigowna Hill, nine miles north-west of Roscrea, Tip-
