THE 



INTELLECTUAL OBSERVER 



REVIEW OF NATURAL HISTORY 



MICROSCOPIC RESEARCH 



AND 



BBCBBATIVE SCIENCE 



VOLUME X. 



ILLUSTRATED WITH PLATES IN COLOURS AND TINTS, AND NUMEROUS 

 ENGRAVINGS ON WOOD 



LONDON 



GROOMBHIDGE AND SONS 



PATERNOSTER ROW 



MDCCCLXVII. 



