160 PEOCEEDINGS OF THE GEOLOGICAL SOCIETY. [Jan. 27, 



in believing it to be distinct, the proportions of the polypary being 

 much greater, and the number of serratures to the inch not much 

 more than half those in G. Jlcwcidus as described by Professor Hall. 

 The only other species observed at this place was a single-celled 

 form, which I have with some hesitation referred to G. Hisingeri 

 ( i=i Sagittarius). 



At jN'ewtown Head, Waterford Harbour, a single -celled Graptolite 

 occurs sparingly with numerous Caradoc-Bala fossils ; this I have 

 doubtfully referred to G. priodon. 



In the adjoining county of Wexford there are several good Grap- 

 tolite-localities, mostly in rocks on the shore of Courtown harbour. 

 At Ballymoney, near Gorey, black slates occur with Diphgrapsus 

 pristis, much distorted by cleavage; and a little south of Ballymoney 

 fishery the following species were collected, — 



Graptohthus Hisingeri? ( = Sagittarius). 

 Didymograpsus sextans. 



Diplograpsus mucronatus. 



teretiusculus. 



Dicranograpsus ramosus. 



flaccidus. 

 Diplograpsus pristis. 



At Ballinatray, near Gorey, fine examples of Dicranograpsus ramosus 

 were collected. West of Ballinatray the black slates, much distorted 

 by cleavage, contain an abundance of Diplograpsus pristis, accom- 

 panied by Cyrtograpsus gracilis ; and a little south of Breanoge 

 Head, near Courtown, a Graptolite, which I have referred to G. 

 Sedgwicki, was collected by Mr. Galvan from a compact greenish 

 slaty rock, such as Graptolites are not usually found in. At Tin- 

 naglogh, four miles N.N.E. of Duncannon, Wexford, the black argil- 

 laceous slates abound with Diplograpsus pristis in a very perfect 

 condition, showing prolonged axis and proximal termination. At 

 Churchtown, one mile north of Tagoat, and about 7 miles S.S.E. of 

 Wexford, the remarkable little branched Graptolite Didymograpsus 

 caduceus, Salter, is not uncommon, accompanied by what I believe to 

 be Graptolithus Hisingeri {=^ Sagittarius), and associated with fossils 

 of Caradoc-Bala age. 



In the south-west of Ireland a few miles north of the city of 

 Limerick, and near Six-mile Bridge, in the county of Clare, a re- 

 markably rich locality for Graptohtes was discovered by Mr. G. H. 

 Kinahan, of the Geological Survey of Ireland, on the western 

 flank of the Slieve Bernagh mountains. The rocks consist of black- 

 argillaceous slates, readily separating into laminae ; the fossils are 

 disclosed in the most perfect condition, the prevailing species being 

 Diplograpsus pristis in all its varieties, resulting from pressure in 

 various directions : examples having very long filamentary processes 

 proceeding from the mouth of the cells appear to me to be identical 

 with Hall's figures of D. mucronatus-, this and D. dentatus, Brongniart, 

 may, however, be only a more perfect condition of D. pristis. It is 

 probable that the bodies I have figured and described as Theca come- 

 toides, from this place*, may be, as suggested by Mr. Carruthers, 



* Journal of the Geological Society of Dublin, vol. ix. 1861, pi. 4. fig. 8. 



