.V. ARRANGEMENT. 197 



some affection to which the reliquium is subject 

 from a variation in the essential form (. III. 33. 

 p. 70. ) from the mode or state of its mineral 

 change (. III. Modus, p. 33) from accidental 

 form (. III. 36. p. 71.) or from the constituent 

 substance (. III. Substantia. p. 135.) Speci- 

 mens, therefore are either 



1. Specimens of the Species or such as exhibit 

 the specific characters 



2. Specimens of the Varieties in which the acci- 

 dental differences in the original species are shewn 



3. Specimens of the Mode exhibiting the diffe- 

 rent states and degrees of mineral change under 

 which the reliquium is found. 



4. Specimens of Accidental Fc.rins in which va- 

 riations of figure arising from the model and con- 

 ditional form (. III. 38. 39. p.p. 72. 73.) are 

 present or 



5. Specimens of the Constituent Substances 

 which display the various materials which have 

 been found constituting the reliquium. 



In the enumeration of specimens, those which 

 have been collected as particular examples of the 

 species and its varieties are not to be separately no- 

 ticed, as they are necessarily included in the specific 

 character and general description (v. . VII.). 



Specimens of the mode are not to be separately 

 described The mode in which the reliquium usu- 

 ally occurs may be stated after the specific cha- 

 racter, and any variations in that mode may be 



