154 . III. DIST. CHAR. Substance. 



of the crustaceans covering of certain ani- 

 mals f. 



123. Testaceous (testaceum) 



of the shell of a worm. 



&c. &c. A vegetal unmineralized reliqufum 

 may be 



124. Ligneous (ligneumj retaining the sub- 

 siance of the wood of a plant. 



125. Foliaceous (foliaceum) 



- > of the leaf of a plant. 



&c. &c. 



The state of the organic substance may be ex- 

 pressed by a compound term ; as 

 C. 126. Bituminoso-ligneous (Mtuminoso-ligncumJ 

 preserving the structure of the wood, but bitu- 

 minated, or passing into the state of a bitumen. 

 127. Carboaaceo-ligneous (carbonaceo-ligneum) 

 retaining the structure of the wood, in the 

 state of carbon or charcoal, v. p. 48-50. 

 &c. &c.ft 



f The crust or covering of the Echinus is frequently found 

 fossil in an unmineralized state. 



t f In description, it will be sometimes necessary to note the 

 state in which the mineral substance exists, combined with the or- 

 ganic form ; as, an 



Impregnating mineral (min. imbuens) is one which fills the 

 pores of a conservatum. 



Inherent m. (m. inh&rens) one existing in small portions in the 

 cavities of another mineral which forms the principal bulk of the 

 petrifaction. 



Constituent m. (m. constituent} that which forms the principal 

 part of the petrifaction, &c. 



