Smyth — Faunal Zones of Rush- Skerries Carhoniferous Section. 547 



Rush Slates and Eush Conglomerate. 



Before presenting the new evidence from these beds we must glance 

 at a discussion of their position in the Loughshinny paper of Matley 

 and Vauglian.' Here Vaughan says that the correlation suggested in 

 their Eush paper." namely — 



Rush Slates — Z. ; Rush Conglomerate and Carlyau Limestone — C to S,, 

 depends upon the similar succession of similar coral-faunas, as set out in the 

 following table : — 



He then gives five points which seem to throw doubt upon this 

 correlation : — 



" (rt) Zaphventes, identical with tliose of the Eush Slates, occur in equal 



abundance near Colne and in the Lane Limestone, and in both 



cases the horizon is probably D. . . . 

 " (6) A. specimen of MicheUnia tenuisepta, found loose near the top of the 



Rush Conglomerate, is identical with the form common in the 



Cyathaxonia beds here assigned to Dji,, and is not known from 



the C-Si level. 

 " (c) Clisiophi/num cf. ohlongum bears a much closer resemblance to the 



highly developed Clisiopbyllids of D than to the Lithostrotion- 



like Clisiophyllids of Sj. 

 " {d) Michelinia megastoma (Phili.) is probably a D species ; . . . 



Quart. Journ. Geol. Soc, vol, Ixiv, 190S, pp. 441-2. 

 Quart. Journ. Geol. Soc, vol. Ixii, 1906, p. 300 



