Smyth — Faunal Zones of Rush-Skerries Carboniferous Section. 539 



The chief change, necessitated by the new evidence, is the shifting of the 

 Lane and Holmpatrick beds bodily from D to and Si. This settles the 

 long-debated question of the equivalence of the two conglomerate groups. 

 They are equivalent, though, perhaps, not exactly coincident. Possibly the 

 Lane Limestone, which contains frequent, inconstant pebbly and shaly 

 layers, may be represented, at least in part, by the lowest beds of the Eush 

 Conglomerate Q-roup. The evidence is not sufficient to decide this. 



The fresh material has enabled a close correlation to be made with the 

 exposures round the English Lake country (north-western province), the 

 Holmpatrick fauna containing a great many species in common with the 

 Arnside and other exposures of Garwood's Chonetes-carinata sub-zone and 

 " Gastropod Beds.'" 



Acknowledgments. 



To Dr. Arthur Vaughan the author is indebted for initiating him into 

 the subject of Carboniferous Zoning, for suggesting the present research, and 

 for frequent help during its progress ; to Professor J. Joly, f.u.s., for giving 

 him every facility and encouragement in carrying out the work, and for 

 valuable advice in photographing the coral slices ; to Dr. 0. A. Matley for 

 the generous loan of his collection from the locality. At least one half the 

 fossils were collected by Mrs. L. B. Smyth. 



Faunal Lists and Correlation. 

 (It has been thought unnecessary to indicate by any mark the species 

 already recorded. They can be ascertained by a glance at the original 

 papers, to which the reader is also referred for particulars of stratigraphy 

 and lithology.) 



Holmpatrick Limestone. 



Corals ; 



Cyathaxonia rushiana, Vau. 



„ cornu, Mich. 



Zaphrentis of. ennisJcilleni, Edw. & H.* 



,, amhigiia, Car. 



„ cf. densa, Car. 



„ sp. 

 Densiphylhim aff. rushianum, Vau. 

 Caninia sp. 



Campophylloid Caninia, 

 Diphyphyllum subibicinum, M'Coy.* 



Quart. Journ. Geol. Soc, vol. Ixviii, 1912, pp. 468 and 470. 



