xii CONTENTS. 



VARIETIES. 



5172. Ordinary Confufon of Varieties with 



Species - page 292 



173. Criteria of Varieties to It: taken from 

 external Appearances - - ibid* 



174. llhijl ratio n of external Ma rks 293 



175. Amorphous Fojjils ibid. 



176. Cbr \Jluline Fojjils - ibid. 



177. External Marks taken from the Tex- 

 ture of Fojjils - - 294 



178. from the Colour ibid. 



179. Plnjical Marks - -295 



180. Varieties of organic Fojjils ibid. 

 8i. Epilogue ibid. 



Of GIVING NAMES to FOSSILS. 



182. The Utility of Names Properly adapted 



in Mineralogy - - . 2(jf 



183. IHJhry of Names in Natural Philofv- 

 phy - ibid. 



184. Of reforming the Names of Fojfils 297 



185. Names that that are evidently abfurd 



c light to expunged 300 



186. Andfalfe names Jikewife Hid. 



187. JVhat then are the Names to be adopt- 301 

 ed ? 301 



1 8 8. IVbat ore the Names to be tolerated? ibid. 



% 189. Nunfies 



