151 



only altogether different from the present, but also very 

 different from one another. To do this we must go back to 

 that far distant time when Cleveland was under the seas of 

 the Mesozoic or Secondary Epoch. No Quaternary or 

 lertiary deposits exist in our area, so that the history of the 

 past marine faunas is necessarily very imperfect, and has 

 to be filled in with details drawn from other parts of the 

 country. It is proposed, however, to contrast the fossil 

 animals of the local stratified rocks with those inhabiting 

 the coast to-day, ascertain in what way they differ or agree 

 and see what conclusions can be drawn from them regarding 

 the climate of Cleveland when they nourished. 



Table II. 

 Census of the Fauna op the Lias. 



class 



Pterosaur 



Crocodilia 



Plesiosauri 



Ichthyosauri 



Fishes 



Crustacea 



Insects 



Ceplialopods 



(other than Nautili 

 Ammonites and 

 Belemnites) 

 A'autili 

 Belemni es 

 Ammonites 

 Univalves 

 Scaphopods 

 Bivalves 

 Lamp Shells 

 Worms 

 Echinoderms 

 Corals 



Protozoa (Foraminifera) 



Total 



654 



152 



