196 . V. PRINCIPLES OF 



Temporary species must be reduced to perma- 

 nent,, as soon as they are found connected with the 

 part, on which the establishment of permanent 

 species depend f . 



The VARIETY ( Varietas) a division of the species, 

 depending on an accidental variation of form in 

 the original Hence varieties in the original species 

 form varieties in the rcliquium. 



Differences of form arising from the loss or pre- 

 sence of an essential part of the original, or from 

 the mode in which the organic form has been pre- 

 served (v. modal accid. form. & conditional ac- 

 cid. form. p.p. 72. 73. ) do not constitute varieties 

 but specimens. 



The SPECIMEN (Specimen} is an individual reli- 

 quium retained as an example of the species, or of 



when discovered to originate from the same plant, they must be 

 arranged as one species, under the division that contains the 

 stems the stem being the part immediately connected \vilh the 

 leaf, on which the establishment of permanent species principally 

 depend. 



f The Reduction of temporary or artificial species into per- 

 manent and natural ones, is an object constantly to be kept in 

 view, by those who systematically cultivate the knowledge of extra- 

 neous fossils the nearer we approach this object, the nearer will 

 the study approximate to that degree of perfection necessary to it 

 as a science While, on the other hand, a neglect of the prin- 

 ciple, we now so strenuously wish to enforce, will, we are con- 

 vinced, increase the confusion and uncertainty, in which the inves- 

 tigation of reliquia is at present involved. 



