236 PEOCEEDIN-GS OF THE aEOLOGICAL SOCIETY. [Jan. 22, 



of these occasionally occur in the bed above. Belemnites jaculum 

 has now entirely disappeared, and its place is taken by Belemnites 

 lateralis, which occurs in prodigious numbers, and in every stage of 

 growth. But the most abundant and strikingly characteristic fossil 

 of this bed is that form (subspecies of Leymerie) of Exogyra sinuata 

 (the large and typical form of which never occui's) which is called 

 E. suhsinuata or E. Couloni, and is likewise so abundant in and cha- 

 racteristic of the Neocomian Limestone of Central and South-eastern 

 France. A soHtary specimen of an Echinoderm, Toxaster comjola- 

 natus, which is equally characteristic of those continental deposits, 

 was probably also obtained from this lowest division of the Speeton 

 clay. 



In my previous paper on the beds of Lincolnshire I abstained from 

 any attempt at correlating the beds below the Tealby series, on 

 account of the paucity and imperfection of their fossils ; but I pointed 

 out that the Carstone of ISTorfolk and Cambridgeshire represents the 

 upper and lower sandy series of Lincolnshire, the intermediate lime- 

 stone and ironstone series having entirely thinned out. I may now 

 state that the fossils of the lower sand and sandstone of Lincolnshire, 

 as well as those of the lower portion of the Carstone of Norfolk, 

 all point to the conclusion that these beds are of Lower-Neocomian 

 age ; and this view has been confirmed in the most striking manner 

 by the discovery of the richly fossiliferous deposits of Upware and 

 Potton. Among the fossils from those localities I find the different 

 varieties of Ammonites Speetonensis and Am. Noricus, a large number 

 of Lower-l!^eocomian species of Brachiopoda, and not a few bivalves 

 and univalves occurring in the same formation. 



I have already pointed oat the very striking correspondence 

 between the lower division of the Speeton Clay and the lower part 

 of the LQlsthon and the Hilsconglomerat of jS'orth- western Ger- 

 many, a correspondence which is sufficiently accounted for when 

 we take into consideration the resemblance in petrological character 

 between the two formations, and also their geographical relations. 



Less numerous, but still most unmistakeable, are the points of 

 analogy between these beds and the Lower-iS'eocomian limestones of 

 the Paris basin (^Caleaire a sjpatangues of Leymerie) and the enor- 

 mous deposits of yellow limestone of Provence and Switzerland, the 

 original ^N^eocomian Limestone (Calcaire i^eocomien a Toxaster com- 

 planatus of D'Archiac). The presence in the Yorkshire bed of such 

 eminently characteristic species as Exogyra Couloni, Toxaster com- 

 planatus. Ammonites Astierianus, Ammonites Noricus, Belemnites 

 lateralis, and others, leaves nothing further to be desired in esta- 

 blishing this correlation. The present state of our knowledge of 

 these foreign beds will not warrant any attempt at drawing a paral- 

 lelism between their subdivisions and the very distinct zones of their 

 Yorkshire representative, though such a parallelism may at some 

 future period be shown to exist. 



Other very extensive deposits of this age occur, as is well known, 

 in Spain, Italy, Austria, the Crimea and Caucasus, I^orthern Africa, 

 and South America. In a collection of Neocomian fossils from 



