TRANSLATIONS AND NOTICES 



OF 



GEOLOGICAL MEMOIRS. 



Some considerations on PALiEONTOLOGiCAL Statics, drawn up 

 from the 'History of Nature" {Geschichte der Natur), or Index 

 PalcBontologicus. By Professor H. G. Bronn. 



(From Leonhard and Bronn's * Neues Jahrbuch,_Jahrgang 1849,' p. 123.) 



Four years ago Professor Goppert published a report in the ' Jahr- 

 buch ' (1845, pp. 415-418), on the present state of our knowledge 

 of fossil plants. This was an extract from his contribution to the 

 Index Pal^ontologicus of our * History of Nature,' in which, how- 

 ever, some additions have subsequently been embodied, to which we 

 have regard in what follows. The zoological portion of this treatise 

 was completed two years ago, and the printing (extending to 130 

 sheets) is also finished ; so that we are now able to give a general 

 review of the whole, in the four following tables, which, however, 

 are not so detailed as in the above place, and also require some fur- 

 ther illustration. We will therefore endeavour to extract a few of 

 the most essential results from out the sea of figures. 



In the Enumerator palseontologicus, which forms the second part 

 of the Index, we have enumerated the genera (Sippen) and species 

 {Arteri) of fossil bodies, according to the geological periods and for- 

 mations in which they occur, under five larger or more extensive, 

 and in twenty -four smaller or more limited heads, of which the first 

 are marked mth I — V. and the second with a — x. These signs are 

 more fully stated in the table below, and in the foUomng pages will 

 often be used for the sake of brevity to designate the different for- 

 mations. 



L 



Carboniferous 



II. Trias 



III. Oolite 



IV. Creta- 



v. 









I— v. 







Period. 





Period. 



Period. 



ceous Per. 



Tertiary I'enod . 







tone. 

 Sandstone. 





a3 



5 



>, 













u 



<u 

 be 

 O 







raes 



on. 



Red 



w 



"O 



e? 





o 



\U 





, 



K 





s s 



c4 ei 





s 



C3 



O 





<a 'Q 





u .3 



a .-a 



U Q 



u 





Kti CO 



Devonian. 

 Mountain Li 

 Coal-formati 

 Lower New 

 Zechstein. 



d 

 o 



Variegated S 

 Dluschelkalk 

 Keuper. 



Lias. 

 Oolite. 

 Kimmeridge 

 Wealden. 



Neocomien. 

 Greensand. 

 Chalk. 



4J 



1 



a 

 a 



2; 



I 1 



1 ^ 



6 S 



i 

 J 



4) 



a, 



w 



.-a 

 to 



I 



< 



c 



i3 



a b 



c d e f g 



h 



i k 1 



m n p 



q r f 



s 



t U 



V 



W X 



y 



z 



VOL. V. — PART 



II 















6 







