state, in by far the greatest part of the substances towards which our in- 

 quiries will be directed, will be found to be that of lime-stone, marble, 

 calcareous spar, chalk, c. When found in this state, and still pos- 

 sessing traces of their original mode of existence, they will be regarded 

 as fit subjects to derive illustration from the labours of the artist. 



LETTER IL 



ARRANGEMENT OF LINNAEUS. ... OF WALLERIUS...THAT ADOPTED IN 

 THE PRESENT WORK....ZOOPH YTES CLAIM PRIORITY OF EXA- 

 MINATION... .CORALS. 



JT HE arrangement which has been adopted in the present volume 

 requires a few words in explanation. Linnaeus commences his arrange- 

 ment of secondary fossils with the mineralised remains of man, passes 

 on to those of mammalia, birds> amphibia, fishes, and insects, and 

 concludes with those of worms; in which are comprised, asteriae y 

 echini, the inhabitants of shells, and those animals which, from 

 apparently partaking both of an animal and vegetable nature, have 

 been distinguished by the name of zoophytes. After having noticed, 

 in this order, 'the fossil remains of animals, he then proceeds to those 

 of vegetables. 



WaHerius, on the other hand, treats first of the vegetable kingdom, 

 and then proceeds to arrange those of the animal kingdom, in the 

 following order ; corals* worms, shells, insects, amphibia, fishes, birds, 

 quadrupeds, and, lastly, man. The latter of these arrangements, ap- 

 pearing to be in several respects preferable to the former, it has beea 

 here nearly adopted. 



