KiLROE — Silurian and Metamorphic Rocks. 



155 



cumstances suggest either the inTersion mentioned, or that the lime- 

 stone is much older than Eala, or yet again that the limestone has 

 heen caught in the hreak between two plains which sever it from 

 the Llandeilo grits on the north, as well as from the Ludlow rocks on 

 the south. In any case it is obvious that on the south side of Killary 

 Harbour occur considerable areas of Llandeilo strata. 



On the north side of the harbour, an ascending series of coarse grits 

 and conglomerates, with intercalated bands of green shales forms the 

 imposing liill !Mweelrea, upon the south flank of which, at a short 

 distance above Bunnaglass, were collected fossils believed, even when 

 the ground was mapped, to be indicative of Caradoc strata.^ At some 

 five points at the foot of the hill, on its west side in Oggool, was 

 found a somewhat abundant fauna, also indicative of Caradoc rocks; and 

 on the north side below the summit, west and north of Lough Eellawaum, 

 Caradoc forms- were also collected, while on the east side of the 

 same small lake fossils were found believed to be determinative of 

 Llandovery strata.^ Here, therefore, a boundary was drawn between 



^Explanatory Memoir of Sheets 83 ana p. 28. The fossils reported from 

 near Bunnaglass were : — 



Leptaena sericea. 0. testudinaria. 



Orthis calligramma. Belleiophon trilobatus. 



Those given from the west foot of Mweelrea included the above-mentioned, 

 together with — 



Lingula ovata. 



Murchisonia trochiformis. 



M. sp. mdet. 



Platyschisma helicites. 



Raphistoma elliptica. 



E. sp. indet. 



Bellerophon bilobatus. 



B. trilobatus. 

 - Those named in the Memoir are : — 



Lepta-na sericea. 



Lingula ovata. 



Orthis biforata. 



0. testudinaria. 



0. (?) vespertili. 



Porambonites intercedens. 

 ^ Explan. Mem. Sheets S3 and 84, pp. 28-30. Some of the above species vrere 

 obtained at the point east of Lough Bellawaum. Those not reported from the 

 other localities were: — 



Orthis elegantula. Orthoceras tenuicinctum. 



Pentamerus galeatus. Phacops sp. indet. 



Holopella cancellata. Proetus latifrons. 



Ecculioniphalus Bucklandi. 

 Theca revessa. 

 T. triangularis. 

 Orthoceras ibex. 

 0. subundulatum.' 

 Asaphus radiatus. 

 A. sp. indet. 



Ctenodonta transversa. 

 Bellerophon bilobatus. 

 B. trilobatus. 

 Orthoceras ibex. 

 Asaphus radiatus. 



