. VII. DELINEATIONS. 205 



The trivial name of temporary species should be 

 formed so as to point out, by the termination, the 

 part furnishing the reliquium. e.g. MAMMODOLI- 



THUS crinidens PHYTOLITHUS recurcifoVnis 



PHVT. nodicaulis PHYT. sulciculmis &c. 



$. VII. 

 DELINEATIONS OF RELIQUIA. 



Elementary Parts. 



The leading parts in the delineation of a reli- 

 quium are the specific character or diagnosis, and 

 the general description. 



Ruta muraria ASPL. Adiantum nigrum HELMINTHOLI- 

 THUS Asteria columnaris. &c. &c. &c. Wliere the original of a 

 reliquium is known, we consider the Linncan name, consisting of 

 the generic and trivial appellations, as the established deno- 

 mination of the recent species, and retain both words, as the 

 trivial name for the fossil. By this, we at once point out the ori- 

 ginal plant or animal, and at the same time avoid a difficulty that 

 would otherwise arise in distinguishing the reliquia, whose proto- 

 types happen to have the same nomen trivia'e assigned them, in 

 the Linnean system. Thus, for instance, the Buccinum decus- 

 satum and Murex decussatum are both found in the fossil state, 



