Yol. 65.] 



CARBONIFEROUS LIMESTONE OF COUNTY CLARE. 



549 



indices of the Bristol area, are of common occurrence throughout. 

 Leptcena cf . analoga, Orthotetes crenistria in a characteristic mutation, 

 and a small Chonetes with very fine ribbing (cf. Chonetes laguessiana, 

 de Kon.) are abundant. Eumetria, Camarotoechia, and Reticularia 

 occur sparingly. 



Z = Zone of Zaphrentis omaliusi (Zaphrentis Zone). 



The lithological characters are dealt with in the description of the 

 subzones. 



Former designation. 

 Stratified Limestone. 



-Lower Limestone Shales and Lower 



Z 3 = subzone of Zaphrentis konincki. 

 Zj = subzone of Spirifer aff. clathratus. 



Faunal list : — 



Corals : 



Zaphrentis omaliusi, M.-Ed. & H. 



and var. densa, Carruthers. 

 Zaphrentis konincki, M.-Ed. & H. 

 Zaphrentis vaughani, sp. no v. 

 Caninia cornucopia, Mich. 



Brachiopods : 



Spirifer aff. clathratus, M'Coy, 



Vaughan. 

 Spiriferina cf. octoplicata (Sow.). 

 Athyris lamellosa (L'Eveille). 

 Athyris cf. glabristria (Phill.). 

 Rhipidomella michelini (L'Eveille, 



Dav.). 

 Schizophoria aff. resupinata 



(Mart.). 

 Syringothyris aff. cuspidata 



(Mart.) mut. Z. 



Other groups : 



Phillipsia gemmulifera (Phill.). 

 Phillipsia truncatula (Phill.). 

 Actinocrinus polydactylus (Miller) 

 Palatal teeth of fishes. 

 Fenestella sp. 



Subdivisions :■ — 

 Horizon /3. 



The only indication of this horizon of faunal overlap is the co- 

 occurrence of Zaphrentis and Spiriferina cf. octoplicata at the base 

 of the Lower Limestone Shales. Exposures are very poor, and the 

 evidence is far from satisfactory. 



Athyris lamellosa occurs commonly in these beds ; a form which 

 is characteristic of the ' octoplicata subzone ' (K 2 ) in the Mendip 

 area. 



Campophyllum c-ylindricum 



(Scouler) [= Caninia']. 

 Syringopora ' 9 ' of Vaughan. 

 Michelinia favosa (Groldf .). 

 Cyathophyllum patula, Mich. 



Syringothyris laminosa (M'Coy). 

 Orthotetes crenistria muts. (Phill.). 

 Chonetes cf. hardrensis, Phill. 

 Chonetes cf. crassistria (M'Coy). 

 Beticidaria cf. reticulata, M'Coy. 

 Derbya bristolensis, Vaughan. 

 Product us aff. pustulosis, Phill. 

 Leptcena cf. analoga (Phill.). 

 Productus cf. burlingtonensis, Hall. 

 Productus aff. semireticulatus 

 (Mart.). 



and other crinoid-stems. 



