Eur< 



Cuba 



England 



France 



Pinar del Rio 





Pi 



03 



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o 



hi 





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a 



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pi 

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Superieur (Pur- 

 berckien) 



Inferieur 





05 



j Simlrirskites mexicanus, Kossmatia 

 zacatecana, K. victoris 



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Virgulien 

 Pterocerien 



Haploceras aft. fialar, Ataxioceras 

 lothari, Perisphinctes ribeiroi, 

 P. cf. pie oe jus, new species of 

 Ataxioceras, Oppelia and Peri- 

 sphinctes 



05 

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03 



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03 

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Pi 



Sequanien (As- 

 tartien) 



Rauracien 

 Argovien 



Ataxioceras virgulatum, Ocheto- 

 ceras marantianum, 0. semifal- 

 catum, Perisphinctes many spe- 

 cies, Haploceras 



Ochetoceras canaliculatum ourck- 

 hardti, 0. mexicanum 



o 



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hi 



o 



M 



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h 



o 



oT 



r— i 



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hi 

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hi 

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Oxfordien 



Aspidoccras perarmatum, Peri- 

 sphinctes plicatiloides, Peri- 

 sphinctes durangensis 



T3 



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c3 



•rH 

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o 



1— 1 



I-H 



03 

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Callovien 



New species of Perisphinctes and a 

 new nautiloid showing affinities 

 with Callovian species of Europe 



03 

 0> 

 4-a 



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 r— 1 

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 O 



P 

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pq 



Bathonien 



New species of PerispMnctes show- 

 ing affinities with late Bajocian 

 and Bathonian species of Europe 



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Bajocien 



New species of Strenoceras re- 

 lated to 8. niortense 



