﻿Yol. 66.] THE ORDOVICIAN OF THE GLENSAUL DISTRICT. 



265 



top of Lettereeneen, and is finely exposed in many large ice-worn 

 surfaces. As has been already mentioned when dealing with the 

 Mount Partry Beds, a strike-fault repeats their upper part and 

 the base of the Shangort Beds ; but the series, when repeated by the 

 fault, does not show by any means so fine a development of the 

 coarse breccia as that forming the crest of the hill. The blocks 

 in the coarse breccia consist of felsite, and the matrix has the 

 character of a gritty ash. 



Bands 1 & 3 do not require any special description, but Band 4 

 is a coarser rock and more definitely a grit than is generally met 

 with in the Shangort Beds of the district : it resembles that under- 

 lying the felsite of the Greenaun ridge. 



III. Table of Eossils from the Shangort and 



ToURMAKEADY BEDS. 



Names of Genera and Species. 



Camerella cf. cuneatella, Dav 



Camerella thomsoni, Dav 



Christiania youngiana, Dav 



Lingula s p 



Lingula brevis, Portl. (?) 



Indeterminable Meri stellid 



Orbiculoidea (?) sp 



Orthis sp 



Orthis cf . balclatchiensis, Dav 



Orthis obtusa, Pander (var.) 



Orthis parva, Pander 



Orthis testudinaria, Dalm 



Plectambonites (?) grayce, Dav 



Plectambonites quinquecostata (?) , M'Coy. 



Plectambonites sericea, Sow 



Porambonites sp 



Rafinesquina imbrex, var. semiglobosina, 



Dav 



Siphonotreta (?) sp 



Streptis affinis, Reed 



Bathyurellus glensaulensis, sp. nov 



Bathyurellus sp 



Bathyurus aff. nero, Billings 



©" © 

 ro © 



z 3 



© GQ w 



3 si ^ 



SI1 



'£ -4-) © 

 CO jji © 



+ 



££ . 



© —i 



2 £ o 



c "" o 



2 ,2 -=5 

 I 'goo 



*9 s 



<3 © £ 



O *3 <M 



.o -gco 



* H o w 



.C © £ 



« s s 



© «<- U 





^^ 



<1^ 



