290 



THE WOKLD OF LIFE 



Fig. 103. — Macroscapliites ivanii. 

 Cretaceous. ' 



Fig. 104. — Hamites rotundus. 



Cretaceous. 



Fig. 105. — Ptychoceras emericianum. 



Cretaceous. 



Fig. lOG. — Ancyloceras Matheronianum. 



Gault. 

 Late Ammonites. (From Nicholson's Palaeontology.) 



Special Features in the Development of Vertehrates 



Another remarkable fact dwelt upon in Dr. Woodward's 

 address is the remarkably small brains of those early types 

 of vertebrates which were not destined to survive. The most 



