"Vol. 65.] CARBONIFEROUS LIMESTONE OF COUNTY CLARE. 561 



Crusheen on the east to Corrofiu on the west, although the country 

 is covered to a large extent by lakes and superficial Drift- 

 deposits. 



The lowest beds, which occur along the north-western foot of 

 the Slieve Aughty Mountains, are for the most part obscured by 

 esker-like mounds of Drift, but the shales of the clathratus subzone 

 are visible in one or two localities in the neighbourhood of Doon 

 Lough. The Iconinclci subzone is also poorly exposed, but its 

 junction with the Syringothyris Zone, which here shows traces of 

 stratification, is visible about 200 yards north of Inchicronan 

 Lough, the intervening cherty beds being strongly developed. The 

 following fossils were found at this locality : — Syringothyris 

 cuspidata, Spirifer Iconinclci, Productus semireticulatus, Pr. aff. quin- 

 cuncialis, and Amplexus coralloides. 



The district to the south along the Ennis road abounds in fossils, 

 of which Vestinautilus carinifer, Aplieleceras mutahile, Pagnax 

 reniformis, Productus semireticulatus, and Amplexus coralloides are 

 the most abundant. 



The small patch of country to the east of the bog near Curraderra 

 Lough, coloured on the Geological Survey map as Upper Limestone, 

 was found to contain Zaphrentis Iconinclci, Z. omaliusi, Oaninia 

 cornucopice, Oampophyllum cylindricum, and Michelinia favosa, an 

 assemblage of corals characteristic of the top of the Zaphrentis 

 Zone ; and it is probable that the cherty beds which occur at 

 this level were mistaken for those at the base of the Upper Lime- 

 stone. 



About a mile north-west of Crusheen is exposed an extensive 

 tract of bare limestone, which stretches far to the north and west. 

 The rock is here dark-grey, compact, and crystalline, and is 

 quarried for building purposes. To the west of Garlick Hill the 

 contained fossils indicate a Lower Seminula age, the following 

 being abundant at this locality : — Campophyllum cylindricum 

 mut. Sj, Syringopora reticulata, Michelinia grandis, early Clisio- 

 phyllids, and Daviesiella cf. comoides. The beds to the westward 

 undulate considerably ; and, though south of Moyree Castle Dibuno- 

 phyllum is of common occurrence, the Seminula Zone is again met 

 with in the neighbourhood of Lough Nabrickoge : Productus cora 

 mut. S 2 , papilionaceous Chonetes, Seminula ambigua, Carcino- 

 phyllum, and Lithostrotion martini being the most abundant fossils. 

 From this point as far as Corrofin the rocks contain a fauna 

 characteristic of the Dibunophyllum Zone, the district between 

 Loughs Cullaun and Inchiquin being especially rich in fossils, 

 such as Dibunophyllum muirheacli, D. 6, Cyathophyllum mur- 

 chisoni, Lithostrotion junceum, L. martini, and Productus aff. 

 giganteus. No fossils characteristic of the Lonsdalia subzone were 

 recorded from this neighbourhood; but the topmost beds of the 

 limestone were found to contain Zaphrentis ennisTcilleni, Oaninia 

 aff. cornucopice, Bensiphyllum and Productus cf. scabriculus, while 

 the overlying black shales were crowded with goniatites and other 



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