﻿262 ME. C. I. OAEDINEE AND PE0F. S. H. EEYNOLDS ON [May 1 9 10, 



indicates that the entire gritty, ashy, and calcareous series (Shangort 

 and Tourmakeady Beds) of both the Glensaul and the Tourmakeady 

 districts represents a somewhat lower horizon than we believed 

 to be the case at the time when our paper on the Tourmakeady 

 district was published. 



A small band of limestone breccia overlies this fossiliferous 

 deposit, running for a short distance west-north-westwards from 

 under the footbridge ; and two other small patches occur near the 

 bend of the stream, about 200 yards to the west. 



Exactly at this bend, and again at a spot about 50 yards below 

 the bridge, thinly-bedded, black and grey, cherty beds are seen. In 

 the latter patch (397) a few badly preserved graptolites were found. 

 These were determined by Miss Elles to be Glyptograptus dentatus 

 (Brongn.) and possibly Didymograptus extensus (Nich.). Both 

 patches show considerable disturbance. 



(2) The exposures between Tonaglanna and Glensaul 

 School. — In this area there is a far finer development of the 

 calcareous beds than anywhere else in the district. The successive 

 bands of tuff, described as occurring in the Greenaun and Garrana- 

 gerra area, are not here very clearly distinguishable, although coarse 

 tuff occurs along the margin of the felsite mass which (as seen in 

 the map, PI. XX) is faulted northwards from the Greenaun felsite. 

 West of this, and immediately north of the triangular patch of 

 Mount Partry Beds faulted in to the west of the felsite, occurs 

 an interesting development of calcareous rocks well exposed in 

 certain old quarries. The upper part of this calcareous series 

 consists of limestone breccia; below this, however, comes a broken-up 

 mass of limestone which we do not regard as limestone breccia, 

 that is, as a rock produced by explosive action, but as a limestone 

 shattered by earth-movement, like the one already described at 

 (97). This limestone (155) is highly fossiliferous, and we obtained 

 from it the following species : — 



Hyolithes aff. dispar, Holm. 

 Orthis of. bolclatchiensis, Dav. 

 Orthis obtusa (var.), Pander. 

 Orthis par va, Pander. 

 Plectambonites sericea, Sow. 

 Plectambonites (?) grayoe, Dav. 

 Christiania youngiana, Dav. 

 Porambonites sp. 

 Lingu/a sp. 

 Orinoid stems. 



lllcenus weaveri, Eeed. 

 Illeenus sp. 

 Niobe sp. 



Sp>h(erocoryphe sp. 

 Orthoceras(?J sp. 

 Trochonema sp. 

 Lophospira sp. 

 Cyclonema sp. 

 Liospira sp. 

 Loxonema (?) sp. 



On the same line of strike, a short distance to the north-east, 

 is a small patch of dolomitized limestone not broken up in any 

 way. 



North-east of this exposure occur three more or less continuous 

 bands of limestone breccia, striking in a north-north-easterly 

 direction. They are surrounded by tuff, in the main fine and gritty, 



