ng.4. 



Fig.5. 



Fig.e, 



Fig.7. 



iML/^ 



Fig.8. 



fig. 9. 



ng.io. 



r^^ 



Fig.ll. 



Fig.lZ. 

 Fig. 1 3. 



Fig. 20. 



Fio. 01.— Cheek-teeth of Alticola. 

 (For explanation see opposite page.) 



