1896.] Praegkr. — The Field Clubs in Cavan, 197 



granite of the L<eiiister chain, which occurs similarly, made 

 Crossdoney of especial interest. Unconformably on the 

 Ordovicians, the Lower Carboniferous sandstone was laid 

 down, and was succeeded by the great Carboniferous Linie- 

 stone, which forms the country west of Cavan, and which 

 includes the basin of Lough Oughter. The sandstone, which 

 is only of local occurrence, had been seen below Lisnamandra. 

 The relations of a small exposure of eurite to the adjacent 

 rocks had not been determined in the short time available ; 

 but there is little doubt that the eurite belongs to the Cross- 

 doney series, and was cold and denuded before the grey 

 quartzite, now seen close against it, was deposited as a sand- 

 bed in the Carboniferous sea. The true position of this eurite 

 is, however, a matter of much interest, as it ma}^ after all, 

 represent a post-Carboniferous intrusion, like the adjacent 

 andesite. The glacial deposits consist of thick boulder- clay, 

 with very little sand and gravel. The boulder-clay capping so 

 many of the hills gives them and their slopes the typical dome- 

 like contour, whether the underlying rock is Ordovician or 

 Carboniferous ; but the limestone of the latter period has 

 larger lakes upon its surface, solution doubtless aiding their 

 formation ; and the broad hollow of the Erne lies in it, 

 stretching away from Cavan to Bnniskillen. 



Afterwards, I was called on to give a short account of the 

 Bladderworts and their allies, as these interesting plants had 

 been particularly in evidence that day. Then a pleasant 

 function was performed as Prof. Cole presented to Henry 

 Hanna a prize recently awarded to him by the Committee of 

 the Belfast Club for the best set of twenty-four microscopical 

 slides showing general excellence. Afterwards we returned 

 to our specimens, and until a late hour the crowd of town's- 

 people round the hotel windows showed the interest that the 

 inhabitants of Cavan took in our mysterious researches. 



Cavan is notoriously a wet count)^ and the statement made 

 with some positiveness by local members, that there could not 

 be more than two such fine da5's in succession, proved correct. 

 Sunday morning was gloomy, and after breakfast heavy rain 

 began to fall. But, indeed, if it had to rain, the weather was 

 most considerate, for a less inconvenient time for rain during 

 our stay could not have been found. The church-goers were 

 in no way deterred, and a large party started oj6f for Killykeen 



