﻿Vol. 66. 



THE ORDOVICIAN OF THE GLENSATJL DISTRICT. 



261 



gritty tuff exactly like the prevalent type of Shangort Beds in 

 the Tourmakeady area, except that it is rather more calcareous 

 when fresh. We obtained the following fossils at the spot marked 

 (62) :- 



Orthis obtusa (?) , Pander. 



Orthis sp. 



Rafinesquvna imbrex, var. semi- 



globosina, Dav. 

 Plectambonites quinquecostata (?), 



M'Coy. 

 Plectambonites sericea, Sow. 

 Porambonites sp. 

 Cystidean (? Echinosphara sp.). 

 Batkyurus aff. nero, Billings. 

 Baihyurus cf. timon, Billings. 

 Bathyurellus glensaulensis, sp. nov. 

 Nileus armadillo, Dalm. 



Illcenus sp. 

 Megalaspia (?) sp. 



Remopleurides sp. 



Cheirurus cf. clavifrons, Dalm. 



Cheirurus aff. ornatus, Dalm. 



Pliomera pseudoarticulata, Portl. 



Pliomera cf. barrandci, Billings. 



Encrinurus octocostntus, sp. nov. 



Cybele sp. 



Phacops (Chasmops) aff. odini, Eichw. 



Harpes sp. 



Platyceras (?) sp. 



Pig. 3. — Coarse volcanic breccia (Shangort Beds) north-east of 

 Glensaul School. The fragments tend to weather more quickly 

 than the matrix. 



a 



Although this deposit is the highest in the district from which 

 we obtained any fossils, except poorly preserved graptolites, the 

 fauna, as pointed out by Mr. Reed in his Palaeontological Notes 

 (p. 271), is rather of an Arenig than of a Llandeilo type, and 



