Smyth — Faunal Zones of Rush-Skerries Carhoniferoiis Section. 549 



" (5) Chonetes cf. comoidi'^ abounds at the top of the Lane Limestone, biit is 

 absent from the Eiish Slates : papilionaceous Chonetes are, however, 

 common in the Carlyan Limestone." 



It will be seen that in this paper the conglomerates are taken as of the 

 same age. It is therefore necessary to examine the comparison just quoted. 

 Wifli the resemblances given the author is in agreement. The differences 

 will be considered in turn : — 



(1) This is so, but is easily explained by difference in conditions of 



deposit, e.g. distance from shore or from river-mouth. 



(2) The two species were found to be equally common in the Rush 



Conglomerate. M. megastoma was not found above either con- 

 glomerate, but above both occurs a form resembling M. tenuisepta. 



(3) Campophylliim aff. Murchisoni was not found. Diphyphyllum suhi- 



bicimcm occurs in the Kate Eocks, which apparently belong not 

 far above the Eush Conglomerate, and which resemble the beds 

 above the Lane Conglomerate in other ways (vide siqjra). 



(4) The second part of this statement does not now hold (see faunal list 



for Holmpatriek Limestone, above). 



(5) Chonetes ef. comoides occurs in the upper part of the Eush Slates (see 



faunal list). 



Rush Conglomerate (upper part). 

 R 10 & 11 (except R 10 b & c). 



Corals : — 



Cyathaxonia cornu, Mich. 

 Zapihrentis densa. Car. 



,, cf. enniskUleni, Ed. & H. 

 ,, cf. dkj}tncta, Car. 



„ amplexoides, Wilmore. 

 Densiphylhim afl. riishianum, Vau. 



„ nodosum, sp. nov. 



Caninia sp. (large). 

 Campophyllum caninoides, Sibly. 



,, cilia turn, Gar. 



Lithostrotion cyathophylloides, Vau. 

 Lophophylliim costatum, M'Goy. 

 ^ Arachniophyllum simplex, gen. et sp. nov. 

 Carruthersella compacta, Gar. 



