562 ME. J. A. DOUGLAS ON THE [Xov. 1909, 



fossils. 1 The latter beds, which Dr. Wheelton Hind has shown 

 to be the equivalents of the Pendleside Series, crop out along the 

 conspicuous escarpment to the west of Inchiquin Lough. Chert is 

 very abundant in the Upper Limestone Beds of this locality, 

 occurring in continuous well-defined bands, one of which forms the 

 summit of Slate Island in the centre of the Loueh. 



(E) Barony of Burren. 



Nearly the whole of the Barony of Burren, which lies in the 

 extreme north of the county, is formed by a vast elevated plateau 

 of Upper Limestone, rising on the west, north, and east in steep 

 terraced cliffs and dipping gently to the south and south-west 

 beneath the Coal Measures. 



The thickness of limestone visible above sea-level amounts to 

 about 1500 feet; and, as the beds undulate considerably, though 

 the dip rarely exceeds 5°, it is almost impossible to trace their 

 stratigraphical sequence over this large area, the bare surface of 

 rock which it presents being too vast to admit of the detailed work 

 necessary for accurate zoning. It is possible, however, by following 

 a definite line across the country, to identify the zones and trace 

 them within certain limits ; but to map their extension over the 

 whole area would entail many years of arduous work, and the 

 results would hardly repay the time expended. 



The district of Oughtmama in the extreme north, between the 

 bays of Aughinish and Muckinish, is almost completely covered by 

 Drift, and the lowest visible beds occur farther south, from the 

 foot of Ballyconreag, along the southern shore of Ballyvaghan 

 Bay, as far as the promontory of Black Head. These beds were 

 found to contain a fauna characteristic of the S 2 subzone, the pro- 

 fusion of Nematophyllum minus at one horizon being a conspicuous 

 local feature ; other fossils recorded from these beds were : — 

 CarcinopJiyllum sp., Syringopora geniculate/,, CampophyUum sp., 

 Lithostrotion martini and L. affine, Seminula ambigua, Dielasma aff. 

 hastatum and CJionetes papilionacea. 



Passing inland, attention was chiefly directed to the investigation 

 of a section drawn slightly east of south from Lough Bask (an 

 interesting inland tidal lake) past Wood Village and Ballyallaban 

 House, and another from Acres Village over Moneen Mountain. 

 An examination was also made of the district to the west comprised 

 in the townland of Gleninagh, including Black Head and the western 

 shore-line. The following description, however, deals chiefly with 

 the first section. 



1 The following fossils were obtained from this locality : — Orthoceras stein- 

 haueri, Sow., Myalina peralata, de Xon., Glyphioceras reticulatum, Phill. 

 Posidoniella Icevis, Brown, and plant-remains. 



