DINOSAURS. 97 
zamia, or ‘‘ false palm’’), constituted the groves and forests of its 
plains and valleys ; and in its fens and marshes the equisetacez 
(mare’s-tails) and plants of a like nature prevailed. 
The Iguanodons of the Wealden epoch did not live and die 
where their bones are now found—the condition in which their 
fossil relics occur proves that they floated down the streams and 
rivers, with rafts of trees and other spoils of the land, till, arrested 
in their course, they sank down and became buried in the 
fluviatile and sometimes marine sediments then being slowly laid 
down. In this way only can we account for the generally 
broken and rolled condition of the bones, their separation from 
each other, the numerous specimens of teeth which must have 
been detached from their sockets, and the broken stems and 
branches of trees without leaves that have been found in the 
Wealden strata of England. 
Since the days of Dr. Mantell, the remains of Iguanodon, or 
closely allied genera, have been found on the continent, in other 
parts of England, and in North America, in strata of various 
ages, from the Trias or New Red Sandstone to the Chalk (see 
Table of Strata, Appendix I.). The American Hadrosaurus must 
have decidedly resembled the Iguanodon. 
The beautiful restoration by our artist (plate VII.) is based 
upon the Belgian specimens described in the following chapter. 
