. III. DIST. CHAR. Substance. 145 



so common,, under an organic form, as the earthy 

 The following are, perhaps, all that have yet been 

 discovered among the substances of reliquta. 



BITUMINOUS ORDER. 

 Bitumen. 



Asphaltum. Kirw. p. 46. Trans. Linn. Soc. v. 

 4. p. 132. F. An. and Veg. We have fre- 

 quently found it filling the cavities of petri- 

 fied shells and coral, and sometimes, though 

 rarely, constituting their entire substance 

 In these, ho w ever, the subjects have been 

 very small. Asphaltum now and then forms, 

 also, the external parts of vegetal remains. 

 Elastic. Hatchett. Trans. Linn. V. 4. p. 146. 

 It is said has been found at Castleton in the 

 form of a shell We have ourselves observed 

 small portions of it sticking in the cavities of 

 petrified shells, but never bearing their form. 

 Jet. Hatchett. Trans. Linn. Soc. V. 4. p. 134. 

 Is sometimes decorated with vegetal impres- 

 sion ; and has been found, we are informed, as 

 the substance of petrified wood. 

 Coal. 



Cannel. James, p. 75. F. Veg. and An. We 



have lately received from Lancashire petri | 



factions of fluviatile shells imbedded in pure 



cannel coal In some of these specimens, coal 



forms the whole of the constituent matter 



of the shell ; in others, only a part ; the rest 



of the petrifaction being made out, or filled, 



u 



