392 PALEONTOLOGY 



7. LOWER CARBONIFEROUS (DINANTIAN 

 OR AVONIAN) ZONES. 



A scheme of zoning for the Carboniferous Limestone 

 of the Bristol district was developed by the late 

 Dr. Vaughan, and published in 1905. It proved 

 applicable over a wide area in South West England and 

 Wales and, with modifications, to the North of England 

 and Belgium. The zone-fossils being shallow water 

 Corals and Brachiopods, it is doubtful if the zones can 

 hold good over a much wider area. The table on p. 393 

 gives Vaughan's zones, and those established by 

 Professor Garwood in the North of England. 



8. FORAMINIFER ZONES OF CARBONI- 

 FEROUS AND PERMIAN. 



Fusulina kattaensis = base of Saxonian. 

 Fusulina verneuili= Artinskian. 

 Schwagenna princeps = Upper Uralian. 

 F'usulina longissima = Lower Uralian. 

 Fusulina cylindnca = Moscovian. 

 Fusulinella struvii = Visean. 



These zones appear to cover the complete range of the 

 sub-family Fiisulinina. 



