PALAEONTOLOGY 



Neocomian=Hauterivian + Valanginian, and is sometimes used to include 

 also Barremian and even Aptian. 



Urgonian is the name of a special facies, partly Barremian, partly Aptian. 



Tithonian = Portlandian + Aquilonian approximately, as developed in Alpine- 

 Mediterranean region. 



Volgian = from Portlandian to Barremian, as developed in Russia. 



Bononian is in England generally divided between Portlandian and Kim- 

 meridgian. 



Corallian is a facies name of variable age, roughly Argovian and Sequanian. 



Oxfordian is used in several senses ; it covers Divesian with either higher 

 stages up to Sequanian or part of Callovian below. 



Bathonian as originally defined included Vesulian, and Bajocian included at 

 least a part of Aalenian, and these terms are still used in the wider sense. 



Toarcian = Yeovilian + Whitbian . 



Pliensbachian = Domerian + Charmouthian ; and Charmouthian was origin- 

 ally synonymous with Pliensbachian. 



Charmouthian has recently been divided by Mr. Buckman into Hwiccian, 

 Wessexian, and Raasayan, and Sinemurian into Deiran, Mercian, and 

 Lymian (see pp. 388-9). 



