Oil the Palteordology of County Dublin. 1G0 



Dublin, between Milltown and Clonskea on the banks of the 

 river Dodder, at several places near Rathgar and Rath- 

 farnham, Kimmage, Crumlin, Goldenbridge, &c., Clondalkin 

 and Lucan, all south of the river Liffey ; and at Killester 

 railway cutting and quarry, south of Finglas, quarries and 

 cuttings at Blanchardstown, east and south of the village, on 

 the north side of the river Liffey. All these are more or less 

 fossiliferous localities, considered by the officers of the Geological 

 Survey* to belong to the Upper Limestone ("Calp " of Sir Richard 

 Griffiths), although the Palseontological evidence affords no 

 grounds for such division. Quarries at Castleknock a little 

 south of the village, and in the townland of Mitchelstown, three 

 miles N.N.W. of Finglas, at Cloghran, Dunsink, north of Cappoge, 

 the large quarries at Saint Doulagh's, rocks on shore near Howth 

 Lodge, and quarry to the south, near the Deer Park, are all in 

 compact Lower Limestone, usually containing a large assemblage 

 of fossils. At Baiscaddan Bay, north of Howth Harbour, are 

 Lower Limestone shales. These lower beds, consisting of dark 

 earthy limestone and shales, are highly fossiliferous. On the 

 shore south-east of Malahide similar strata appear, the low cliffs 

 containing an abundance of corals, crinoids, and Brachiopods. In 

 some beds near the second Martello tower from Malahide, bunches 

 of coral, Lithodendron junceum, may be seen attached to a large 

 bivalve shell, Pleurorhynchus fusiformis; other beds are full of 

 Spirifera bisidcata, Athyris planosulcata, &c. 



The old quarries inland — at Seamount, south of Malahide, and 

 Feltrim to the south-west — have furnished a large number of 

 species. Still further north, near the northern boundary of 

 Sheet 102 Geological Survey Map, a little south of Skerries, a 

 large quarry in the Lower Limestone has also yielded many 

 fossils, amongst them being the large and beautiful univalve shell, 

 Platyschisma (Turbo) tia^a, a fossil which has also lately been 

 collected by Captain Bennett, at How^th quarry, and Clare, Co. 

 Kildare. 



The following is a list of the quarries and other places in the 

 County of Dublin where Lower Carboniferous Limestone 

 fossils have been observed, t These localities are numbered, 



♦ Explanation of Sheets 102 and 112, Geological Survey ./f Ireland, 1861, p. 7. 

 f Ibid,, p. 13, &c. 



