226 NATURAL HISTORY 



lites, lenticulites, helicites, trochilites, buccinites, pate I- 

 lites, chamites, buccardites, donacites, venulites, ostra- 

 cites, terebratulites, anomites, gryphites, musculites, and 

 coraliiolites. Some varieties contain petrified fishes of 

 various genera and species, and also fossil amphibious 

 animals. The vegetable petrifactions that occur in this 

 formation are of stems and leaves, as those of the popu- 

 lus and rhamnus, and of flowers, as the ranunculus. 



V. Third Flcttz, or Shell Limestone. 

 This formation is newer than either the second lime- 

 stone or sandstone ; and the following list contains the 

 names of several of the petrifactions found in it. 



Asteriatites eremita. Schlottheim. Gotha. 

 Encrinites trochitiferus. Blumenb. Abbild. F. 60. 

 Pentacrinites Gottingensis. Heimberg, near Gottingen. 

 Britannicus. Blum. Abbild. T. TO. F. a. I. 



Dorsetshire.^ 



Echinites ruralis. Schlottheim. Tonna. 

 Dentalites obsoletus. Schlottheim. Tonna. 

 Bitubulites problematicus. Bl. Abb. T. II. F. 9. 

 Belemnites paxillosus. Schlottheim. Heimberg, near 



Gottingen. 



Ammonites nodosus. Mus. Tessin. T. 4. F. 3. Thuringia. 

 franconicus. Knorr. P. II. 1. A. 2. F. 1. 



Koburg. 



margaritatus. Montf. Fol. 90. Antwerp, 

 amaltheus. Knorr. P. II. 1. T. A. II. F. 3. 



France. 



planulites. Monf. F. T8. 

 dubius. Bourg. T. 39. F. 163. 

 spatosus. List. Anim. Angl. T. 6. F. 3. Got- 

 tingen. 



* Does this really belong to the shell limestone ? 



