d JfREPACE. 



in the remarks on Classification, the author of the Treatise on Botany has been 

 drawn, by force of circumstances, to give much prominence to the Linnaean system ; 

 and this is the less to be regretted, since the analysis of the system, and the directions 

 which follow it, may suffice to enable the reader to enter upon the study with facility, 

 and to learn almost without trouble the positions of nearly all the most important 

 plants of native origin. He will also find not only that there is a similarity between 

 plants and animals from the presence of vital functions viz., those of reproduction, 

 respiration, circulation, digestion, growth, and decay but that the very structures 

 which give them bulk and form have in many instances close analogical resemblances. 

 Thus the simple cell, which is the universal basis of animal structures, is, in like 

 manner, and in equal degree, the universal basis of vegetable tissues. The thick- 

 walled cells are very like to bone cells, the milk-bearing vessels to capillary blood- 

 vessels, and their milky juice to the chyle or digested food of animals. Many other 

 parts are analogous to those of. animals in appearance ; whilst others, again, are like 

 them in function. 



In accordance with the train of reasoning which this close connexion between 

 Plants and Animals suggests, the ordinary method of arranging the animal kingdom haa 

 been reversed ; the arrangement adopted having the obvious advantage of bringing 

 together those plants and animals which so closely resemble each other as to render it 

 sometimes doubtful to which of the kingdoms of Nature they belong. 



"With these few remarks we conclude the Natural History of PLANTS And INTER- 

 TEBRATED ANIMALS. The remaining portion of Organic Nature, which embraces the 

 nigher forms of animal organization, commencing with the Fishes and terminating 

 with Man, will be concluded in another volume. 



LONDON, January, 1855. 



