JURASSIC PLANTS. 



427 



Fig. 634. 



Fig. 635 



Figs. 631-636.— Jurassic Plants— Cycads and Ferns: 631. Pterophyllum comptum (a Cycad). 632. 

 Hemitelites Brownii (a Fern). 633. Coniopteris Murrayana. 634. Pachypteris lanceolata. Con- 

 ifers : 635. Cone of a Pine. 636. Cone of an Araucaria. 



very abundantly in connection with the coal-bearing strata. It is prob- 

 able, therefore, that the coal is composed largely of these plants. Some 

 remains of Jurassic plants are given (Figs. 631-636), and also of living 

 Cycads (Figs. 630, 637), for comparison. 



