Vol. 65.] 



ROCKS OF THE TOTTRMAKEADY DISTRICT. 



117 



eastern border there is a remarkably fine development of the 

 limestone-breccia, and overlying this a series of coarse breccias, 

 consisting of felsite-blocks embedded in a fine ashy matrix, is exposed 

 at several points. 



The prevailing rock-type is, however, the calcareous grit or 

 gritty ash, which, as has been already mentioned, is especially 

 characteristic of the Llandeilo of the district. As elsewhere, the 

 rock when fresh is very hard and compact, and fossils could only 

 be detected when it was much weathered. The following fossils 

 were found a quarter of a mile south of Gortbunacullin (212) : — 



Camerella sp. 



Orthisina ascendens, Pander. 



Orthis crispa, M'Coy (?). 



Orthis t est 'udin aria, Dalin. 



Orthis sp. 



Acidaspis sp. 



Cyhele connemarica, sp. nov. 



Encrinurus sp. 



Phacops (Chasmops) sp. 

 Pliomera bencvolens, Salt. (?). 

 Pliomera pseudoarticulata, Portl. (?). 

 Hclicotoma or Euomphcdus sp. 

 Crinoids. 



Glyptccystis (?) sp. 

 Monticuliporoid. 



At a spot about a third of a mile south-south-west of Gortbuna- 

 cullin, and near a little patch of limestone-breccia, the following fossils 

 occurred in calcareous grit (318) : — Plectambonites sericea, Sow. (?), 

 Orthis cf. intercostata, Portl., Orthis sp., Triplecia spiriferoides, 

 Portl., Orthis cf. christianice, Kjerulf, crinoids, and Asaphus sp. 



(3) The district lying east of the main part of the 

 green f elsite-intrusion. — This district, which is on the line of 

 strike of that just described, and only separated from it by a 

 short space, has a length of rather over half a mile and a width of, 

 as a rule, 200 yards or less. 



In the southern part a large series of fossils was obtained from 

 ashy grits of the same type as those found near Gortbunacullin. 

 Mr. Beed has identified those enumerated in the following list from 

 a point (322) about half a mile south -south-west of Shangort. The 

 presence of Pliomera (= Arnjjhion), which occurs in some abundance, 

 definitely fixes the age of the beds as not later than Llandeilo. 



Camerella thomsoni, Dav. 

 Orbiculoidea sp. 



Orthisina ascendens, Pander (?). 

 Orthis cf. actonicB, Sow. 

 Orthis calligramma, Dalm. 

 Orthis crispa, M'Coy (?). 

 Orthis cf. interplicata, M'Coy. 

 Orthis testudinaria, Dalm. 

 Orthis sp. 



Plectambonites sericea, Sow. 

 Streptis affinis, sp. nov. 

 Apatocephalus (?) sp. 

 Asaphus sp. 

 Symphysurus (?) sp. 



Calymene sp. 



Cybele connemarica, sp. nor. 



Encrinurus cf. multisegmencai'us., 



Portl. 

 Planus sp. 

 Lichas sp. 



Pliomera benevolens, Salt. ( ?). 

 Pliomera cf. pseudoarticulata, 



Portl. 

 Sphcerocoryphe sp. 

 Turrilepas sp. 

 Eccyliomphalus sp. 

 Indeterminable gasteropod. 

 Glyptocystis (?) sp. 



Farther north a similar series of ashy grits is met with, in which, 

 at a point (217) about 300 yards south-west of Shangort, the 



