Fig. 147. Zamia pimgens. 



Fig. 148. Cycas revoluta. 



THE PRE-ADAMITE EARTH. 



CHAPTEE V. 



318. Convulsion which closed the age. Jurassic Age. 319. Division 

 of Jurassic formations into ten stages by M. D'Orbigny. 320. Nomen- 

 clature and thickness of the stages. 321. Section of the strata from 

 the Vosges towards Paris. 322. State of the earth in the Jurassic 

 age. 323. Jurassic age zoologically distinguished from the Triassic. 

 324. Distribution of the species into ten stages. 325. General 

 inference respecting the distribution of specific forms. 326. Geography 

 of Europe in Jurassic age D'Orbigny's map. 327. The Anglo- 

 Parisian basin. 328. The Pyrenean basin. 329. The Mediterranean 

 basin. 330. Variation of the shores of these seas from period to 

 period. 331. Discordances and isolation of the strata. 332. Cor- 

 responding observations on the organic deposits 333. Variations of 

 the outlines of land during this age. 334. Change of condition of 

 land between Toulon and Innspruck. 335. Accurate knowledge of the 

 Jurassic geography. 336. Elie de Beaumont's Jurassic map. 337. 

 Ichthyosaurus, Plesiosaurus, and Pterodactyle. 338. Other animals 

 of the Jurassic age. 339. Coral reefs. 340. Insects. 341. The 

 vegetable kingdom. FIRST JURASSIC PERIOD. 342. Convulsion that 

 closed the Triassic age. 343. First Jurassic stage determined by 

 discordances and isolation of stratification. 344. Extent of the seas 

 in Western Europe remarkable, discordances of stratification on the 

 Alps. 345. Synopsis of the animal kingdom. 346. Reptiles, fishes 

 and insects. 347. Convulsion which closed the period. SECOND 

 JURASSIC PERIOD. 348. Mineral character of this stage. 349. 

 Synopsis of animal kingdom. 350. Marine fauna, 351. No traces 

 of terrestrial fauna. 3 5 2. Vegetation of the period. 



LARDNER'S MUSEUM OF SCIENCE. F 65 



No. 148. 



