$. V. ARRANGEMENT. 1ST 



Tribes, or Families, into which Linnseus has else- 

 where distributed the vegetal kingdom (v. Phil. 

 Bot. p. 27. 37.) as numberless detached parts of 

 plants occur ia the fossil state, which cannot, at 

 present, be referred to those divisions Hence, ex- 

 traneous fossils that owe their form to plants, can 

 properly constitute but one genus ; viz. 



1. PHYTOLITHUS f . 



The FAMILY (Familia) is a subdivision of the 

 genus. Families are either permanent and natural, 

 or temporary and artificial. 



Permanent ( Families permanentes ) contain per- 

 manent species only (v. species,, inf.) and are 

 founded on the natural divisions (genera or orders). 

 of the originals, e. g. Entrochitcs, Echinites > &c. 

 Genus HELMINTHOLITHUS, 



which the original subject belongs except such fossil owe its 

 form to a plant from a natural family or tribe (viz. Alga, Fillets, 

 c.) with which some of the classes in the sexual system agree- 

 On the contrary, the fossil remains of animals, however small or 

 detached the parts may be, are always referable to the classes of 

 their prototypes For these divisions, in the Linneaii arrangement 

 of animals, are established on real and not on factitious dis- 

 tinctions ; and under natural tribes, every part of an individual 

 will be found impressed with characteristic marks of the division 

 to which nature has assigned it. 



f Linnaeus appears to have been well aware of the difficulty of 

 forming more than ope genus for the fossil remains of plants ; and 

 accordingly we find him, even in the last Edit, of the Systema Nat. 

 rejecting the Lit hophy Hunt, Lithoxyhn, Rizolithus, kc. of Vogel 

 and other authors, as genera, though he has assumed them *i 

 specie*. 



