INFERIOR OOLITE. 



155 



repositories in the series of secondary strata : one group lies above the 

 chalk ; another is included between the chalk and the lias ; and a third 

 occupies the coal measures and mountain limestone. A cursory observer 

 may, perhaps, be led to confound together the ferns and calamites of the 

 coal district with the ferns and equiseta of the oolitic rocks ; though to 

 a botanical eye their difference is very apparent : but who can mistake 

 the lepidodendra of the former, the cycadiform fronds of the middle 

 period, and the dicotyledonous leaves and fruits which abound above the 

 chalk ? Many interesting inquiries connected with this subject, as the 

 temperature and condition of the earth, when these plants flourished 

 upon its surface, their inhumation beneath vast deposits of marine shells, 

 and their subsequent conversion to coal of different chemical properties, 

 must here be left unexplored ; but I cannot avoid calling the attention of 

 geologists to the perfect harmony between the distribution of fossil plants 

 and fossil shells. The three great divisions of secondary strata which en- 

 close the three peculiar groups of fossil plants are precisely those which 

 are, in the most decided manner, characterised by the distinct races of 

 molluscous animals which existed during their deposition. 



FOSSILS OF THE INFERIOR OOLITE, OR, DOGGER. 

 Dicotyledonous wood ... ... ... Coldmoor, Blue wick. 



Caryophyllia convexa 

 Meandrina 

 Cidaris, a plate 



Gastrochaena tortuosa (Min. Conch.) 

 Psammobia laevigata 

 My a. 1. calceiformis 



2. dilata 



3. literata (Min. Conch.) 

 4>. aequata .-.>. 



ZOOPHYTA AND BADIARIA. 



PI. XI. fig. 1. Blue wick, Cold moor. 



Blue wick. 



PL XL fig. 2. Ditto. 



MOLLUSCA. 



PI. XL fig. 36. Blue wick. 



PI. IV. fig 5. Ditto, and other strata. 

 PI. XL fig. 3. Ditto. 



fig. 4. Glaizedale (Whitby Mus.) 



PL VII. fig. 5. Cold moor, near Stokesley. 



PI. XL fig. 12. Blue wick. 

 x 2 



