CONTENTS. XV 



Page 



Monsters in Crystals 240 



Monsters in Vegetables 241 



Monsters in Animals 242 



Monsters before Birth 243 



Monsters after Birth 245 



Monsters Hereditary 246 



Supernumerary parts, how far affected by the Will 247 



Are particular Species subject to particular Monstrosities ? 248 



Classification of Monsters ; 248 



On Hermaphroditism . , 249 



Notes and Queries on Monsters 250 



Double-headed Snakes 251 



OBSERVATIONS ON PSYCHOLOGY. 



On Consciousness 252 



On the Mind 256 



Affections or States of Mind 259 



On the Action of the Brain 261 



On Reason 262 



On Ideas from Sensation 268 



On Command or Presence of Mind 264 



On Fear , 267 



On Superstition 267 



On Deceit 268 



Periods of Life as characterized by Mental Operations 271 



On Hereditary Right 275 



On Sympathies 275 



On Appetite and Passion 276 



On Instinct 277 



Notes and Queries on Imitation and Custom 278 



Miscellaneous Notes and Apophthegms 279 



OBSERVATIONS ON PALEONTOLOGY. 



Lecture I. On Hunter's printed Paper on Fossils 281 



Modes and Aims of studying Anatomy 281 



History of Hunter's published Paper on Fossils 286 



History of Hunter's posthumous Paper on Fossils 292 



Lecture II 296 



Lecture III. On Hunter's MS. Paper on Fossils 297 



Definition of 'Extraneous Fossils ' 297 



Extension of the term to ' Moulds,' ' Casts ' and ' Impressions ' 298 



True mode and limits of the study of Geology 299 



Historical sketch of Geology to the time of Hunter 299 



Comparison of Fossils to Historical Monuments, Coins and Medals .... 303 



