IN THE ANGLO-PARIS BASIN 



V. 



(c) The Zone of Euhoplites lautus 

 Links with other Faunal Provinces . 



A. The boundaries of the hoplitinid province 



B. Links with sequences of other countries 

 (i) West Pakistan 



(ii) Tethyan belt 

 (hi) Algeria 

 (iv) Somalia . 

 (v) Madagascar . 

 (vi) South America 



(a) Colombia 



(b) Peru . 



(vii) 



(vih) 

 (ix) 

 (x) 



Texas 

 Canada . 

 Greenland 

 Conclusion 



VI. 



VII. 



VIII. 



Conditions of deposition in England 



(a) The Margins of the depositional basin in England and 

 Northern France 



(b) The Structural Controls on Deposition in Southern England 



(c) Source of Middle Albian Sediments 



(d) The cristatum Subzone disturbance 

 Review of the Ammonite Fauna . 



A. Description of new species 



B. Stratigraphical list 

 References ..... 



129 

 130 

 J 30 

 133 

 133 

 133 

 134 

 134 

 134 

 134 

 134 

 135 

 135 

 137 

 138 

 138 

 139 



140 

 143 

 147 

 148 

 149 

 149 

 152 

 155 



SYNOPSIS 



Much new information on the stratigraphy of the Middle Albian substage gained from sections 

 in England and France is recorded, and where possible previous knowledge is revised, sufficient 

 to stabilize the Ammonite Zonal scheme in the Anglo-Paris Basin ; d'Orbigny's type area of the 

 Stage. The succession in England is compared in detail with that of northern France by refer- 

 ence to sections in the Pas de Calais, Meuse, Marne, Haute Marne, Aube, Yonne, Pays de Bray, 

 and Pays de Caux, several misconceptions being eliminated. The ammonite zonal scheme is 

 discussed in detail to provide the basis for international agreement of a zonal scheme for the 

 faunal province, here termed the hoplitinid ammonite faunal province, of which the Anglo- 

 Paris Basin is but a part. A brief review is made of the faunal links between the hoplitinid 

 province, covering much of Europe, and neighbouring ammonite faunal provinces. These links 

 occur essentially in the lyelli Subzone near the base of the Middle Albian, and in the cristatum 

 Subzone at the base of the Upper Albian. The palaeogeographical implications of the distribu- 

 tion of the faunal provinces are mentioned briefly. A study of the conditions of Middle Albian 

 deposition in England shows that it tends to follow the pattern of Lower Albian and Aptian 

 sedimentation in direct contrast to that of the Upper Albian where a different pattern pre- 

 vailed. A review of the ammonite fauna terminates the work. 



R£SUM£ 



L'auteur presente des nouvelles informations sur la stratigraphie de l'Albien moyen de 

 l'Angleterre et de la France, afin d'etablir le plan zonale des ammonites dans le bassin anglo- 

 parisien, qui est la region typique de l'etage de d'Orbigny. Les couches de l'Angleterre sont 

 compares en detail avec ceux-la de la France septentrionale. L'auteur donne tous les detail du 

 plan zonale des ammonites, afin d'etablir une province faunistique des ammonites hoplitinid6s. 

 L'auteur discute les liens faunistique entre la province des hoplitinides et les provinces faunisti- 

 que avoisinantes des ammonites. Ces liens ont bien surtout dans la sous-zone de lyelli aupres 



