Smyth — Faimal Zones of Rush-Skejries Carboniferous Section. 553 



Other Ci species occurring between R 6 and R 10 c are Clinnetes cf. comoides 

 and Spiriferina Imninosa. 



Comparison of Lane Limestone with Rush Slates, 

 UPPER + Rush Conglomeratks, lower. 



Both have been assigned above to Cj. Although their faunas differ 

 considerably, as do their lithological characters, the following points of 

 similarity may be noted : — 



Chonetes cf. comoides occurs, and the same Orthotetid is common in both. 



Zaphrentk anibigua is common in the lower beds, and dies out upwards in 

 both cases. 



Zaphreiitis ambigua. var. a, which is the characteristic coral of the Lane 

 Limestone, is also found in the upper Rush Slates. 



Some of the shaly beds in the Lane Limestone have a very strong 

 resemblance to certain beds about R 8 and 9, being full of black, lustrous 

 Orthotetid fragments, Ostracods, Mollusca, and Phillipsids. 



Corals : — 



Brachiopods : 



Rush Slates 

 lowest exposure to R 4 a (incl.). 



Cyathaxonia coriiu, Mich, common. 

 Zaphrentin ambigua, Car. common. 



„ delanoui, Edw. & H. 



„ cf. disjuncta, Car. 



,, amplexoides, Wilmore. 

 DemiphyUum nodomm, sp. nov. 

 Caninia cornucopiae, Mich, common. 

 Amplexus cf. Sowerbyi, Phil. 



„ cf. coralloides, Sow. 



Productus Wrightii, Day. 



,, cf. concinnus, Sow. 



„ burlingtonensis, Hall. ? 



„ cf. rugatus, Phil. 



„ cf. youngiaiius, Dav. 



,, laciuiaf.us, M'Coy. ? 

 Chonetes cf. lagiiessiana, de Kon. 

 Orthotetid (fragmentary). 



4x2 



