THE FEE-ADAMITE EARTH. 



Jurassic age, the cicadeee, however, being less numerous in relation 

 to the ferns. The flora consisted principally of cryptogamous acro- 

 genous plants, such as the arborescent ferns, the marsileaceous, 

 and equisetaceous classes ; of dicotyledonous gymnosperms, such 

 as cicadese and conifers, and of many of doubtful classes. 



SECOND CRETACEOUS PERIOD. 



418. The composition of the second stage of the Cretaceous for- 

 mation corresponds nearly with the 14th group of Lyell, including 

 the Speeton clay of Yorkshire. 



419. A generic summary of the fauna (excepting the Annulata), 

 is given in the following table : 



Synopsis of the Animal Kingdom (exclusive of Annulata') during the 

 Second Cretaceous Period. 



420. The outlines of sea and land in Europe did not differ 

 much from their configuration in the preceding period. An island 

 was formed on the present site of the Alps, extending from Castel- 

 lane near Digue, in the department of the Basses- Alpes, to the 

 department of the Hautes- Alpes, See map, fig. 172. 



421. The marine fauna differed but little from that of the pre- 

 ceding period, consisting of numerous cephalopods of singular 

 forms (fig. 173, 174). 



422. That the land was clothed with vegetation is proved by 

 the numerous remains of wood found in the strata. M. Brongniart 

 has described a pine of this period, the cone of which measured 

 ten inches in length, and an inch and three quarters in diameter, 

 found in the bed of the Marne near St. Didier. 



106 



