436 



MESOZOIC TIME. 



The famous beds of Lithographic slate at Solenhofen, a very fine-grained calcareous 

 rock, affording remains of many Insects, several species of Saurians, Pterodactyls, etc., 

 are situated in the district of Pappenheim in Bavaria, and are of the age of the Middle 

 Ooly te, or that of the Coral Limestone. 



II. Life. 



1. Plants. 



The land-plants of the Jurassic period were mainly Ferns, Conifers, 

 and Gycads, as in the Triassic. Leaves and stems are found in many 



Figs. 761, 762. 



Fig. 761, Section from near Lullworth Cove, showing stumps of trees (a) in the Portland " dirt 

 bed ; " 762, stump of the Cycad, Mantellia (Cycadeoidea) megalophylla (X-j 1 ^)- ' 



of the strata, and remains of a forest in what is called the Portland 

 dirt-bed (Fig. 761), the trees of which were Conifers and Cycads. 

 Figure 762 represents, much reduced, one of the Cycad stumps. 

 Near Whitby, on the sea-coast of Yorkshire, and in the Stonesfield 

 slate, fossil ferns are common. 



No Jurassic Angiosperms are known. 



2. Animals. 

 Sponges were not uncommon ; one kind is shown in Fig. 768. The 

 Figs. 768-770. 



Sponge, of the Oblyte. — Fig. 768, Scyphia reticulata. Polyp-Corals, of the Oolyte. 

 Montlivaltia caryophyllata ; 770, Prionastraea oblonga. 



■Fig. 769, 



