Smyth — Faunal Zones of Rush- Skerries Carboniferous Section. 541 



Camarotoechia cf . flexistria, Phil. 



„ ef. pleurodon, Phil.* 



Dielasma of. hastatum, Sow.* 



,, of. gillingensis, Dav. 



Faunal characters : — 



Chonetes of. papilionacea, vars. and Diphyphyllum subibicinum are common 

 throughout. 



In the middle parts the following are common at a few levels : — 

 Large Schizophoria. 

 Bisulcate Spirifers. 

 Concinnoid Produoti. 

 SchellwieneUa cf. crenintria. 

 Productus margaritaceus. 

 Cyathaxonia nishiana. 

 Zaphrentis enniskilleni. 

 Lithostrotion Mm'tini. 

 The upper parts are characterized by the abundance of Productus 

 corrugato-hemisphericus. The specimens of Michelinia obtained are frag- 

 mentary. They resemble M. tenuisepta, but have larger tubes and thicker 

 -walls. Possibly they belong to M. gmndis. Similar fragments were obtained 

 from the Carlyan Limestone. 



In 1908 Vaughan' placed these beds, together with the Lane Limestone 

 and Lane Conglomerate, in D, but with some hesitation, owing to the 

 " imperfect and scanty material." The evidence relied upon was the presence 

 of the following : — 



(1) Planicostate Spirifers. 



(2) " A single, poor specimen" of Productus humerosus, Sow. "found loose" 



in the Lane beds. 



(3) Productus longispimis. 



(4) Martinia glabra. 



(5) Michelinia cf. tenuisepta. 



(6) A new genus of Clisiophyllid, of which only two other specimens were 



recorded, one from the top of the Midland Massif, near Wetton, 

 the other from the Cyathaxonia-heds of Eush. 



(7) A new species of Densiphylloid Zaphrentis also occurring in the 



neighbouring Dibunophyllum beds which have an undoubted 

 D fauna. 



1 Quart. Journ. Geol. Soc, vol. Ixiv, 1908, p. 439. 



