PREFACE. 



This little work is merely intended to assist the Geological 

 Student, by affording him a general view of the Fauna 

 and Flora of some of the principal formations as they are 

 developed in the British Isles, so as to enable him more 

 readily to comprehend the numerical proportion of these 

 fossil organisms, as well as the objects to which his atten- 

 tion shoidd be directed in his various examinations of the 

 different strata. Appended to each division adopted in 

 this volume, is a very slight sketch of the subordinate 

 beds belonging to them, as compiled from the principal 

 authors who have written on the subject. A few of the 

 chief localities are given where the deposits may be best 

 examined, and lists are also inserted of the more impor- 

 tant works, memoirs, or papers which have especial refer- 

 ence to each of the formations, so that the Student may be 

 directed to those sources where more detailed information 

 is to be obtained of any particidar deposits, which may, at 

 any time, engage his attention. 



